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Upgrade to PHP 7.1 (#150)

Browse Source 
* upgrade to PHP 7.1

* bump travis and composer to PHP 7.1

* fix tests
This commit is contained in:
Tomáš Votruba 2017-11-14 21:21:23 +01:00 committed by Arkadiusz Kondas
parent 331d4b133e
commit 653c7c772d
127 changed files with 419 additions and 420 deletions
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5
.travis.yml
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@ -4,9 +4,6 @@ matrix:
fast_finish: true fast_finish: true
include: include:
- os: linux
php: '7.0'
- os: linux - os: linux
php: '7.1' php: '7.1'
@ -18,7 +15,7 @@ matrix:
language: generic language: generic
env: env:
- _OSX=10.11 - _OSX=10.11
- _PHP: php70 - _PHP: php71
before_install: before_install:
- if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then /usr/bin/env bash tools/prepare_osx_env.sh ; fi - if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then /usr/bin/env bash tools/prepare_osx_env.sh ; fi

2
composer.json
View File

@ -17,7 +17,7 @@
} }
}, },
"require": { "require": {
"php": ">=7.0.0" "php": "^7.1"
}, },
"require-dev": { "require-dev": {
"phpunit/phpunit": "^6.0", "phpunit/phpunit": "^6.0",

12
src/Phpml/Association/Apriori.php
View File

@ -11,13 +11,13 @@ class Apriori implements Associator
{ {
use Trainable, Predictable; use Trainable, Predictable;
const ARRAY_KEY_ANTECEDENT = 'antecedent'; public const ARRAY_KEY_ANTECEDENT = 'antecedent';
const ARRAY_KEY_CONFIDENCE = 'confidence'; public const ARRAY_KEY_CONFIDENCE = 'confidence';
const ARRAY_KEY_CONSEQUENT = 'consequent'; public const ARRAY_KEY_CONSEQUENT = 'consequent';
const ARRAY_KEY_SUPPORT = 'support'; public const ARRAY_KEY_SUPPORT = 'support';
/** /**
* Minimum relative probability of frequent transactions. * Minimum relative probability of frequent transactions.
@ -116,7 +116,7 @@ class Apriori implements Associator
/** /**
* Generate rules for each k-length frequent item set. * Generate rules for each k-length frequent item set.
*/ */
private function generateAllRules() private function generateAllRules(): void
{ {
for ($k = 2; !empty($this->large[$k]); ++$k) { for ($k = 2; !empty($this->large[$k]); ++$k) {
foreach ($this->large[$k] as $frequent) { foreach ($this->large[$k] as $frequent) {
@ -130,7 +130,7 @@ class Apriori implements Associator
* *
* @param mixed[] $frequent * @param mixed[] $frequent
*/ */
private function generateRules(array $frequent) private function generateRules(array $frequent): void
{ {
foreach ($this->antecedents($frequent) as $antecedent) { foreach ($this->antecedents($frequent) as $antecedent) {
if ($this->confidence <= ($confidence = $this->confidence($frequent, $antecedent))) { if ($this->confidence <= ($confidence = $this->confidence($frequent, $antecedent))) {

8
src/Phpml/Classification/DecisionTree.php
View File

@ -14,8 +14,8 @@ class DecisionTree implements Classifier
{ {
use Trainable, Predictable; use Trainable, Predictable;
const CONTINUOUS = 1; public const CONTINUOUS = 1;
const NOMINAL = 2; public const NOMINAL = 2;
/** /**
* @var array * @var array
@ -72,7 +72,7 @@ class DecisionTree implements Classifier
$this->maxDepth = $maxDepth; $this->maxDepth = $maxDepth;
} }
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
$this->samples = array_merge($this->samples, $samples); $this->samples = array_merge($this->samples, $samples);
$this->targets = array_merge($this->targets, $targets); $this->targets = array_merge($this->targets, $targets);
@ -354,7 +354,7 @@ class DecisionTree implements Classifier
/** /**
* Used to set predefined features to consider while deciding which column to use for a split * Used to set predefined features to consider while deciding which column to use for a split
*/ */
protected function setSelectedFeatures(array $selectedFeatures) protected function setSelectedFeatures(array $selectedFeatures): void
{ {
$this->selectedFeatures = $selectedFeatures; $this->selectedFeatures = $selectedFeatures;
} }

8
src/Phpml/Classification/Ensemble/AdaBoost.php
View File

@ -84,7 +84,7 @@ class AdaBoost implements Classifier
/** /**
* Sets the base classifier that will be used for boosting (default = DecisionStump) * Sets the base classifier that will be used for boosting (default = DecisionStump)
*/ */
public function setBaseClassifier(string $baseClassifier = DecisionStump::class, array $classifierOptions = []) public function setBaseClassifier(string $baseClassifier = DecisionStump::class, array $classifierOptions = []): void
{ {
$this->baseClassifier = $baseClassifier; $this->baseClassifier = $baseClassifier;
$this->classifierOptions = $classifierOptions; $this->classifierOptions = $classifierOptions;
@ -93,7 +93,7 @@ class AdaBoost implements Classifier
/** /**
* @throws \Exception * @throws \Exception
*/ */
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
// Initialize usual variables // Initialize usual variables
$this->labels = array_keys(array_count_values($targets)); $this->labels = array_keys(array_count_values($targets));
@ -149,7 +149,7 @@ class AdaBoost implements Classifier
$classifier->setSampleWeights($this->weights); $classifier->setSampleWeights($this->weights);
$classifier->train($this->samples, $this->targets); $classifier->train($this->samples, $this->targets);
} else { } else {
list($samples, $targets) = $this->resample(); [$samples, $targets] = $this->resample();
$classifier->train($samples, $targets); $classifier->train($samples, $targets);
} }
@ -216,7 +216,7 @@ class AdaBoost implements Classifier
/** /**
* Updates the sample weights * Updates the sample weights
*/ */
protected function updateWeights(Classifier $classifier, float $alpha) protected function updateWeights(Classifier $classifier, float $alpha): void
{ {
$sumOfWeights = array_sum($this->weights); $sumOfWeights = array_sum($this->weights);
$weightsT1 = []; $weightsT1 = [];

4
src/Phpml/Classification/Ensemble/Bagging.php
View File

@ -106,7 +106,7 @@ class Bagging implements Classifier
return $this; return $this;
} }
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
$this->samples = array_merge($this->samples, $samples); $this->samples = array_merge($this->samples, $samples);
$this->targets = array_merge($this->targets, $targets); $this->targets = array_merge($this->targets, $targets);
@ -117,7 +117,7 @@ class Bagging implements Classifier
$this->classifiers = $this->initClassifiers(); $this->classifiers = $this->initClassifiers();
$index = 0; $index = 0;
foreach ($this->classifiers as $classifier) { foreach ($this->classifiers as $classifier) {
list($samples, $targets) = $this->getRandomSubset($index); [$samples, $targets] = $this->getRandomSubset($index);
$classifier->train($samples, $targets); $classifier->train($samples, $targets);
++$index; ++$index;
} }

2
src/Phpml/Classification/KNearestNeighbors.php
View File

@ -26,7 +26,7 @@ class KNearestNeighbors implements Classifier
/** /**
* @param Distance|null $distanceMetric (if null then Euclidean distance as default) * @param Distance|null $distanceMetric (if null then Euclidean distance as default)
*/ */
public function __construct(int $k = 3, Distance $distanceMetric = null) public function __construct(int $k = 3, ?Distance $distanceMetric = null)
{ {
if (null === $distanceMetric) { if (null === $distanceMetric) {
$distanceMetric = new Euclidean(); $distanceMetric = new Euclidean();

4
src/Phpml/Classification/Linear/Adaline.php
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@ -9,12 +9,12 @@ class Adaline extends Perceptron
/** /**
* Batch training is the default Adaline training algorithm * Batch training is the default Adaline training algorithm
*/ */
const BATCH_TRAINING = 1; public const BATCH_TRAINING = 1;
/** /**
* Online training: Stochastic gradient descent learning * Online training: Stochastic gradient descent learning
*/ */
const ONLINE_TRAINING = 2; public const ONLINE_TRAINING = 2;
/** /**
* Training type may be either 'Batch' or 'Online' learning * Training type may be either 'Batch' or 'Online' learning

14
src/Phpml/Classification/Linear/DecisionStump.php
View File

@ -14,7 +14,7 @@ class DecisionStump extends WeightedClassifier
{ {
use Predictable, OneVsRest; use Predictable, OneVsRest;
const AUTO_SELECT = -1; public const AUTO_SELECT = -1;
/** /**
* @var int * @var int
@ -86,7 +86,7 @@ class DecisionStump extends WeightedClassifier
/** /**
* @throws \Exception * @throws \Exception
*/ */
protected function trainBinary(array $samples, array $targets, array $labels) protected function trainBinary(array $samples, array $targets, array $labels): void
{ {
$this->binaryLabels = $labels; $this->binaryLabels = $labels;
$this->featureCount = count($samples[0]); $this->featureCount = count($samples[0]);
@ -146,7 +146,7 @@ class DecisionStump extends WeightedClassifier
* points to be probed. The more split counts, the better performance but * points to be probed. The more split counts, the better performance but
* worse processing time (Default value is 10.0) * worse processing time (Default value is 10.0)
*/ */
public function setNumericalSplitCount(float $count) public function setNumericalSplitCount(float $count): void
{ {
$this->numSplitCount = $count; $this->numSplitCount = $count;
} }
@ -171,7 +171,7 @@ class DecisionStump extends WeightedClassifier
// Before trying all possible split points, let's first try // Before trying all possible split points, let's first try
// the average value for the cut point // the average value for the cut point
$threshold = array_sum($values) / (float) count($values); $threshold = array_sum($values) / (float) count($values);
list($errorRate, $prob) = $this->calculateErrorRate($targets, $threshold, $operator, $values); [$errorRate, $prob] = $this->calculateErrorRate($targets, $threshold, $operator, $values);
if ($split == null || $errorRate < $split['trainingErrorRate']) { if ($split == null || $errorRate < $split['trainingErrorRate']) {
$split = ['value' => $threshold, 'operator' => $operator, $split = ['value' => $threshold, 'operator' => $operator,
'prob' => $prob, 'column' => $col, 'prob' => $prob, 'column' => $col,
@ -181,7 +181,7 @@ class DecisionStump extends WeightedClassifier
// Try other possible points one by one // Try other possible points one by one
for ($step = $minValue; $step <= $maxValue; $step += $stepSize) { for ($step = $minValue; $step <= $maxValue; $step += $stepSize) {
$threshold = (float) $step; $threshold = (float) $step;
list($errorRate, $prob) = $this->calculateErrorRate($targets, $threshold, $operator, $values); [$errorRate, $prob] = $this->calculateErrorRate($targets, $threshold, $operator, $values);
if ($errorRate < $split['trainingErrorRate']) { if ($errorRate < $split['trainingErrorRate']) {
$split = ['value' => $threshold, 'operator' => $operator, $split = ['value' => $threshold, 'operator' => $operator,
'prob' => $prob, 'column' => $col, 'prob' => $prob, 'column' => $col,
@ -203,7 +203,7 @@ class DecisionStump extends WeightedClassifier
foreach (['=', '!='] as $operator) { foreach (['=', '!='] as $operator) {
foreach ($distinctVals as $val) { foreach ($distinctVals as $val) {
list($errorRate, $prob) = $this->calculateErrorRate($targets, $val, $operator, $values); [$errorRate, $prob] = $this->calculateErrorRate($targets, $val, $operator, $values);
if ($split == null || $split['trainingErrorRate'] < $errorRate) { if ($split == null || $split['trainingErrorRate'] < $errorRate) {
$split = ['value' => $val, 'operator' => $operator, $split = ['value' => $val, 'operator' => $operator,
@ -289,7 +289,7 @@ class DecisionStump extends WeightedClassifier
return $this->binaryLabels[1]; return $this->binaryLabels[1];
} }
protected function resetBinary() protected function resetBinary(): void
{ {
} }

12
src/Phpml/Classification/Linear/LogisticRegression.php
View File

@ -11,17 +11,17 @@ class LogisticRegression extends Adaline
/** /**
* Batch training: Gradient descent algorithm (default) * Batch training: Gradient descent algorithm (default)
*/ */
const BATCH_TRAINING = 1; public const BATCH_TRAINING = 1;
/** /**
* Online training: Stochastic gradient descent learning * Online training: Stochastic gradient descent learning
*/ */
const ONLINE_TRAINING = 2; public const ONLINE_TRAINING = 2;
/** /**
* Conjugate Batch: Conjugate Gradient algorithm * Conjugate Batch: Conjugate Gradient algorithm
*/ */
const CONJUGATE_GRAD_TRAINING = 3; public const CONJUGATE_GRAD_TRAINING = 3;
/** /**
* Cost function to optimize: 'log' and 'sse' are supported <br> * Cost function to optimize: 'log' and 'sse' are supported <br>
@ -97,7 +97,7 @@ class LogisticRegression extends Adaline
* Sets the learning rate if gradient descent algorithm is * Sets the learning rate if gradient descent algorithm is
* selected for training * selected for training
*/ */
public function setLearningRate(float $learningRate) public function setLearningRate(float $learningRate): void
{ {
$this->learningRate = $learningRate; $this->learningRate = $learningRate;
} }
@ -106,7 +106,7 @@ class LogisticRegression extends Adaline
* Lambda (λ) parameter of regularization term. If 0 is given, * Lambda (λ) parameter of regularization term. If 0 is given,
* then the regularization term is cancelled * then the regularization term is cancelled
*/ */
public function setLambda(float $lambda) public function setLambda(float $lambda): void
{ {
$this->lambda = $lambda; $this->lambda = $lambda;
} }
@ -139,7 +139,7 @@ class LogisticRegression extends Adaline
/** /**
* Executes Conjugate Gradient method to optimize the weights of the LogReg model * Executes Conjugate Gradient method to optimize the weights of the LogReg model
*/ */
protected function runConjugateGradient(array $samples, array $targets, \Closure $gradientFunc) protected function runConjugateGradient(array $samples, array $targets, \Closure $gradientFunc): void
{ {
if (empty($this->optimizer)) { if (empty($this->optimizer)) {
$this->optimizer = (new ConjugateGradient($this->featureCount)) $this->optimizer = (new ConjugateGradient($this->featureCount))

10
src/Phpml/Classification/Linear/Perceptron.php
View File

@ -88,12 +88,12 @@ class Perceptron implements Classifier, IncrementalEstimator
$this->maxIterations = $maxIterations; $this->maxIterations = $maxIterations;
} }
public function partialTrain(array $samples, array $targets, array $labels = []) public function partialTrain(array $samples, array $targets, array $labels = []): void
{ {
$this->trainByLabel($samples, $targets, $labels); $this->trainByLabel($samples, $targets, $labels);
} }
public function trainBinary(array $samples, array $targets, array $labels) public function trainBinary(array $samples, array $targets, array $labels): void
{ {
if ($this->normalizer) { if ($this->normalizer) {
$this->normalizer->transform($samples); $this->normalizer->transform($samples);
@ -111,7 +111,7 @@ class Perceptron implements Classifier, IncrementalEstimator
$this->runTraining($samples, $targets); $this->runTraining($samples, $targets);
} }
protected function resetBinary() protected function resetBinary(): void
{ {
$this->labels = []; $this->labels = [];
$this->optimizer = null; $this->optimizer = null;
@ -148,6 +148,8 @@ class Perceptron implements Classifier, IncrementalEstimator
/** /**
* Trains the perceptron model with Stochastic Gradient Descent optimization * Trains the perceptron model with Stochastic Gradient Descent optimization
* to get the correct set of weights * to get the correct set of weights
*
* @return void|mixed
*/ */
protected function runTraining(array $samples, array $targets) protected function runTraining(array $samples, array $targets)
{ {
@ -169,7 +171,7 @@ class Perceptron implements Classifier, IncrementalEstimator
* Executes a Gradient Descent algorithm for * Executes a Gradient Descent algorithm for
* the given cost function * the given cost function
*/ */
protected function runGradientDescent(array $samples, array $targets, \Closure $gradientFunc, bool $isBatch = false) protected function runGradientDescent(array $samples, array $targets, \Closure $gradientFunc, bool $isBatch = false): void
{ {
$class = $isBatch ? GD::class : StochasticGD::class; $class = $isBatch ? GD::class : StochasticGD::class;

2
src/Phpml/Classification/MLPClassifier.php
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@ -45,7 +45,7 @@ class MLPClassifier extends MultilayerPerceptron implements Classifier
/** /**
* @param mixed $target * @param mixed $target
*/ */
protected function trainSample(array $sample, $target) protected function trainSample(array $sample, $target): void
{ {
// Feed-forward. // Feed-forward.

10
src/Phpml/Classification/NaiveBayes.php
View File

@ -13,9 +13,9 @@ class NaiveBayes implements Classifier
{ {
use Trainable, Predictable; use Trainable, Predictable;
const CONTINUOS = 1; public const CONTINUOS = 1;
const NOMINAL = 2; public const NOMINAL = 2;
const EPSILON = 1e-10; public const EPSILON = 1e-10;
/** /**
* @var array * @var array
@ -57,7 +57,7 @@ class NaiveBayes implements Classifier
*/ */
private $labels = []; private $labels = [];
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
$this->samples = array_merge($this->samples, $samples); $this->samples = array_merge($this->samples, $samples);
$this->targets = array_merge($this->targets, $targets); $this->targets = array_merge($this->targets, $targets);
@ -77,7 +77,7 @@ class NaiveBayes implements Classifier
* Calculates vital statistics for each label & feature. Stores these * Calculates vital statistics for each label & feature. Stores these
* values in private array in order to avoid repeated calculation * values in private array in order to avoid repeated calculation
*/ */
private function calculateStatistics(string $label, array $samples) private function calculateStatistics(string $label, array $samples): void
{ {
$this->std[$label] = array_fill(0, $this->featureCount, 0); $this->std[$label] = array_fill(0, $this->featureCount, 0);
$this->mean[$label] = array_fill(0, $this->featureCount, 0); $this->mean[$label] = array_fill(0, $this->featureCount, 0);

2
src/Phpml/Classification/SVC.php
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@ -14,7 +14,7 @@ class SVC extends SupportVectorMachine implements Classifier
int $kernel = Kernel::LINEAR, int $kernel = Kernel::LINEAR,
float $cost = 1.0, float $cost = 1.0,
int $degree = 3, int $degree = 3,
float $gamma = null, ?float $gamma = null,
float $coef0 = 0.0, float $coef0 = 0.0,
float $tolerance = 0.001, float $tolerance = 0.001,
int $cacheSize = 100, int $cacheSize = 100,

2
src/Phpml/Classification/WeightedClassifier.php
View File

@ -14,7 +14,7 @@ abstract class WeightedClassifier implements Classifier
/** /**
* Sets the array including a weight for each sample * Sets the array including a weight for each sample
*/ */
public function setSampleWeights(array $weights) public function setSampleWeights(array $weights): void
{ {
$this->weights = $weights; $this->weights = $weights;
} }

2
src/Phpml/Clustering/DBSCAN.php
View File

@ -24,7 +24,7 @@ class DBSCAN implements Clusterer
*/ */
private $distanceMetric; private $distanceMetric;
public function __construct(float $epsilon = 0.5, int $minSamples = 3, Distance $distanceMetric = null) public function __construct(float $epsilon = 0.5, int $minSamples = 3, ?Distance $distanceMetric = null)
{ {
if (null === $distanceMetric) { if (null === $distanceMetric) {
$distanceMetric = new Euclidean(); $distanceMetric = new Euclidean();

8
src/Phpml/Clustering/FuzzyCMeans.php
View File

@ -71,7 +71,7 @@ class FuzzyCMeans implements Clusterer
$this->maxIterations = $maxIterations; $this->maxIterations = $maxIterations;
} }
protected function initClusters() protected function initClusters(): void
{ {
// Membership array is a matrix of cluster number by sample counts // Membership array is a matrix of cluster number by sample counts
// We initilize the membership array with random values // We initilize the membership array with random values
@ -80,7 +80,7 @@ class FuzzyCMeans implements Clusterer
$this->updateClusters(); $this->updateClusters();
} }
protected function generateRandomMembership(int $rows, int $cols) protected function generateRandomMembership(int $rows, int $cols): void
{ {
$this->membership = []; $this->membership = [];
for ($i = 0; $i < $rows; ++$i) { for ($i = 0; $i < $rows; ++$i) {
@ -98,7 +98,7 @@ class FuzzyCMeans implements Clusterer
} }
} }
protected function updateClusters() protected function updateClusters(): void
{ {
$dim = $this->space->getDimension(); $dim = $this->space->getDimension();
if (!$this->clusters) { if (!$this->clusters) {
@ -136,7 +136,7 @@ class FuzzyCMeans implements Clusterer
return $sum; return $sum;
} }
protected function updateMembershipMatrix() protected function updateMembershipMatrix(): void
{ {
for ($i = 0; $i < $this->clustersNumber; ++$i) { for ($i = 0; $i < $this->clustersNumber; ++$i) {
for ($k = 0; $k < $this->sampleCount; ++$k) { for ($k = 0; $k < $this->sampleCount; ++$k) {

4
src/Phpml/Clustering/KMeans.php
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@ -9,8 +9,8 @@ use Phpml\Exception\InvalidArgumentException;
class KMeans implements Clusterer class KMeans implements Clusterer
{ {
const INIT_RANDOM = 1; public const INIT_RANDOM = 1;
const INIT_KMEANS_PLUS_PLUS = 2; public const INIT_KMEANS_PLUS_PLUS = 2;
/** /**
* @var int * @var int

8
src/Phpml/Clustering/KMeans/Cluster.php
View File

@ -64,17 +64,17 @@ class Cluster extends Point implements IteratorAggregate, Countable
return $point; return $point;
} }
public function attachAll(SplObjectStorage $points) public function attachAll(SplObjectStorage $points): void
{ {
$this->points->addAll($points); $this->points->addAll($points);
} }
public function detachAll(SplObjectStorage $points) public function detachAll(SplObjectStorage $points): void
{ {
$this->points->removeAll($points); $this->points->removeAll($points);
} }
public function updateCentroid() public function updateCentroid(): void
{ {
if (!$count = count($this->points)) { if (!$count = count($this->points)) {
return; return;
@ -109,7 +109,7 @@ class Cluster extends Point implements IteratorAggregate, Countable
return count($this->points); return count($this->points);
} }
public function setCoordinates(array $newCoordinates) public function setCoordinates(array $newCoordinates): void
{ {
$this->coordinates = $newCoordinates; $this->coordinates = $newCoordinates;
} }

4
src/Phpml/Clustering/KMeans/Point.php
View File

@ -93,7 +93,7 @@ class Point implements ArrayAccess
* @param mixed $offset * @param mixed $offset
* @param mixed $value * @param mixed $value
*/ */
public function offsetSet($offset, $value) public function offsetSet($offset, $value): void
{ {
$this->coordinates[$offset] = $value; $this->coordinates[$offset] = $value;
} }
@ -101,7 +101,7 @@ class Point implements ArrayAccess
/** /**
* @param mixed $offset * @param mixed $offset
*/ */
public function offsetUnset($offset) public function offsetUnset($offset): void
{ {
unset($this->coordinates[$offset]); unset($this->coordinates[$offset]);
} }

6
src/Phpml/Clustering/KMeans/Space.php
View File

@ -47,7 +47,7 @@ class Space extends SplObjectStorage
/** /**
* @param null $data * @param null $data
*/ */
public function addPoint(array $coordinates, $data = null) public function addPoint(array $coordinates, $data = null): void
{ {
$this->attach($this->newPoint($coordinates), $data); $this->attach($this->newPoint($coordinates), $data);
} }
@ -56,7 +56,7 @@ class Space extends SplObjectStorage
* @param Point $point * @param Point $point
* @param null $data * @param null $data
*/ */
public function attach($point, $data = null) public function attach($point, $data = null): void
{ {
if (!$point instanceof Point) { if (!$point instanceof Point) {
throw new InvalidArgumentException('can only attach points to spaces'); throw new InvalidArgumentException('can only attach points to spaces');
@ -180,7 +180,7 @@ class Space extends SplObjectStorage
private function initializeRandomClusters(int $clustersNumber) : array private function initializeRandomClusters(int $clustersNumber) : array
{ {
$clusters = []; $clusters = [];
list($min, $max) = $this->getBoundaries(); [$min, $max] = $this->getBoundaries();
for ($n = 0; $n < $clustersNumber; ++$n) { for ($n = 0; $n < $clustersNumber; ++$n) {
$clusters[] = new Cluster($this, $this->getRandomPoint($min, $max)->getCoordinates()); $clusters[] = new Cluster($this, $this->getRandomPoint($min, $max)->getCoordinates());

2
src/Phpml/CrossValidation/RandomSplit.php
View File

@ -8,7 +8,7 @@ use Phpml\Dataset\Dataset;
class RandomSplit extends Split class RandomSplit extends Split
{ {
protected function splitDataset(Dataset $dataset, float $testSize) protected function splitDataset(Dataset $dataset, float $testSize): void
{ {
$samples = $dataset->getSamples(); $samples = $dataset->getSamples();
$labels = $dataset->getTargets(); $labels = $dataset->getTargets();

4
src/Phpml/CrossValidation/Split.php
View File

@ -29,7 +29,7 @@ abstract class Split
*/ */
protected $testLabels = []; protected $testLabels = [];
public function __construct(Dataset $dataset, float $testSize = 0.3, int $seed = null) public function __construct(Dataset $dataset, float $testSize = 0.3, ?int $seed = null)
{ {
if (0 >= $testSize || 1 <= $testSize) { if (0 >= $testSize || 1 <= $testSize) {
throw InvalidArgumentException::percentNotInRange('testSize'); throw InvalidArgumentException::percentNotInRange('testSize');
@ -61,7 +61,7 @@ abstract class Split
return $this->testLabels; return $this->testLabels;
} }
protected function seedGenerator(int $seed = null) protected function seedGenerator(?int $seed = null): void
{ {
if (null === $seed) { if (null === $seed) {
mt_srand(); mt_srand();

2
src/Phpml/CrossValidation/StratifiedRandomSplit.php
View File

@ -9,7 +9,7 @@ use Phpml\Dataset\Dataset;
class StratifiedRandomSplit extends RandomSplit class StratifiedRandomSplit extends RandomSplit
{ {
protected function splitDataset(Dataset $dataset, float $testSize) protected function splitDataset(Dataset $dataset, float $testSize): void
{ {
$datasets = $this->splitByTarget($dataset); $datasets = $this->splitByTarget($dataset);

4
src/Phpml/Dataset/FilesDataset.php
View File

@ -17,14 +17,14 @@ class FilesDataset extends ArrayDataset
$this->scanRootPath($rootPath); $this->scanRootPath($rootPath);
} }
private function scanRootPath(string $rootPath) private function scanRootPath(string $rootPath): void
{ {
foreach (glob($rootPath.DIRECTORY_SEPARATOR.'*', GLOB_ONLYDIR) as $dir) { foreach (glob($rootPath.DIRECTORY_SEPARATOR.'*', GLOB_ONLYDIR) as $dir) {
$this->scanDir($dir); $this->scanDir($dir);
} }
} }
private function scanDir(string $dir) private function scanDir(string $dir): void
{ {
$target = basename($dir); $target = basename($dir);

2
src/Phpml/DimensionReduction/EigenTransformerBase.php
View File

@ -48,7 +48,7 @@ abstract class EigenTransformerBase
* top eigenVectors along with the largest eigenValues. The total explained variance * top eigenVectors along with the largest eigenValues. The total explained variance
* of these eigenVectors will be no less than desired $totalVariance value * of these eigenVectors will be no less than desired $totalVariance value
*/ */
protected function eigenDecomposition(array $matrix) protected function eigenDecomposition(array $matrix): void
{ {
$eig = new EigenvalueDecomposition($matrix); $eig = new EigenvalueDecomposition($matrix);
$eigVals = $eig->getRealEigenvalues(); $eigVals = $eig->getRealEigenvalues();

10
src/Phpml/DimensionReduction/KernelPCA.php
View File

@ -10,10 +10,10 @@ use Phpml\Math\Matrix;
class KernelPCA extends PCA class KernelPCA extends PCA
{ {
const KERNEL_RBF = 1; public const KERNEL_RBF = 1;
const KERNEL_SIGMOID = 2; public const KERNEL_SIGMOID = 2;
const KERNEL_LAPLACIAN = 3; public const KERNEL_LAPLACIAN = 3;
const KERNEL_LINEAR = 4; public const KERNEL_LINEAR = 4;
/** /**
* Selected kernel function * Selected kernel function
@ -50,7 +50,7 @@ class KernelPCA extends PCA
* *
* @throws \Exception * @throws \Exception
*/ */
public function __construct(int $kernel = self::KERNEL_RBF, float $totalVariance = null, int $numFeatures = null, float $gamma = null) public function __construct(int $kernel = self::KERNEL_RBF, ?float $totalVariance = null, ?int $numFeatures = null, ?float $gamma = null)
{ {
$availableKernels = [self::KERNEL_RBF, self::KERNEL_SIGMOID, self::KERNEL_LAPLACIAN, self::KERNEL_LINEAR]; $availableKernels = [self::KERNEL_RBF, self::KERNEL_SIGMOID, self::KERNEL_LAPLACIAN, self::KERNEL_LINEAR];
if (!in_array($kernel, $availableKernels)) { if (!in_array($kernel, $availableKernels)) {

2
src/Phpml/DimensionReduction/LDA.php
View File

@ -47,7 +47,7 @@ class LDA extends EigenTransformerBase
* *
* @throws \Exception * @throws \Exception
*/ */
public function __construct(float $totalVariance = null, int $numFeatures = null) public function __construct(?float $totalVariance = null, ?int $numFeatures = null)
{ {
if ($totalVariance !== null && ($totalVariance < 0.1 || $totalVariance > 0.99)) { if ($totalVariance !== null && ($totalVariance < 0.1 || $totalVariance > 0.99)) {
throw new \Exception('Total variance can be a value between 0.1 and 0.99'); throw new \Exception('Total variance can be a value between 0.1 and 0.99');

4
src/Phpml/DimensionReduction/PCA.php
View File

@ -32,7 +32,7 @@ class PCA extends EigenTransformerBase
* *
* @throws \Exception * @throws \Exception
*/ */
public function __construct(float $totalVariance = null, int $numFeatures = null) public function __construct(?float $totalVariance = null, ?int $numFeatures = null)
{ {
if ($totalVariance !== null && ($totalVariance < 0.1 || $totalVariance > 0.99)) { if ($totalVariance !== null && ($totalVariance < 0.1 || $totalVariance > 0.99)) {
throw new \Exception('Total variance can be a value between 0.1 and 0.99'); throw new \Exception('Total variance can be a value between 0.1 and 0.99');
@ -73,7 +73,7 @@ class PCA extends EigenTransformerBase
return $this->reduce($data); return $this->reduce($data);
} }
protected function calculateMeans(array $data, int $n) protected function calculateMeans(array $data, int $n): void
{ {
// Calculate means for each dimension // Calculate means for each dimension
$this->means = []; $this->means = [];

8
src/Phpml/FeatureExtraction/TfIdfTransformer.php
View File

@ -13,14 +13,14 @@ class TfIdfTransformer implements Transformer
*/ */
private $idf; private $idf;
public function __construct(array $samples = null) public function __construct(?array $samples = null)
{ {
if ($samples) { if ($samples) {
$this->fit($samples); $this->fit($samples);
} }
} }
public function fit(array $samples) public function fit(array $samples): void
{ {
$this->countTokensFrequency($samples); $this->countTokensFrequency($samples);
@ -30,7 +30,7 @@ class TfIdfTransformer implements Transformer
} }
} }
public function transform(array &$samples) public function transform(array &$samples): void
{ {
foreach ($samples as &$sample) { foreach ($samples as &$sample) {
foreach ($sample as $index => &$feature) { foreach ($sample as $index => &$feature) {
@ -39,7 +39,7 @@ class TfIdfTransformer implements Transformer
} }
} }
private function countTokensFrequency(array $samples) private function countTokensFrequency(array $samples): void
{ {
$this->idf = array_fill_keys(array_keys($samples[0]), 0); $this->idf = array_fill_keys(array_keys($samples[0]), 0);

18
src/Phpml/FeatureExtraction/TokenCountVectorizer.php
View File

@ -34,7 +34,7 @@ class TokenCountVectorizer implements Transformer
*/ */
private $frequencies; private $frequencies;
public function __construct(Tokenizer $tokenizer, StopWords $stopWords = null, float $minDF = 0.0) public function __construct(Tokenizer $tokenizer, ?StopWords $stopWords = null, float $minDF = 0.0)
{ {
$this->tokenizer = $tokenizer; $this->tokenizer = $tokenizer;
$this->stopWords = $stopWords; $this->stopWords = $stopWords;
@ -44,12 +44,12 @@ class TokenCountVectorizer implements Transformer
$this->frequencies = []; $this->frequencies = [];
} }
public function fit(array $samples) public function fit(array $samples): void
{ {
$this->buildVocabulary($samples); $this->buildVocabulary($samples);
} }
public function transform(array &$samples) public function transform(array &$samples): void
{ {
foreach ($samples as &$sample) { foreach ($samples as &$sample) {
$this->transformSample($sample); $this->transformSample($sample);
@ -63,7 +63,7 @@ class TokenCountVectorizer implements Transformer
return array_flip($this->vocabulary); return array_flip($this->vocabulary);
} }
private function buildVocabulary(array &$samples) private function buildVocabulary(array &$samples): void
{ {
foreach ($samples as $index => $sample) { foreach ($samples as $index => $sample) {
$tokens = $this->tokenizer->tokenize($sample); $tokens = $this->tokenizer->tokenize($sample);
@ -73,7 +73,7 @@ class TokenCountVectorizer implements Transformer
} }
} }
private function transformSample(string &$sample) private function transformSample(string &$sample): void
{ {
$counts = []; $counts = [];
$tokens = $this->tokenizer->tokenize($sample); $tokens = $this->tokenizer->tokenize($sample);
@ -113,7 +113,7 @@ class TokenCountVectorizer implements Transformer
return $this->vocabulary[$token] ?? false; return $this->vocabulary[$token] ?? false;
} }
private function addTokenToVocabulary(string $token) private function addTokenToVocabulary(string $token): void
{ {
if ($this->isStopWord($token)) { if ($this->isStopWord($token)) {
return; return;
@ -129,7 +129,7 @@ class TokenCountVectorizer implements Transformer
return $this->stopWords && $this->stopWords->isStopWord($token); return $this->stopWords && $this->stopWords->isStopWord($token);
} }
private function updateFrequency(string $token) private function updateFrequency(string $token): void
{ {
if (!isset($this->frequencies[$token])) { if (!isset($this->frequencies[$token])) {
$this->frequencies[$token] = 0; $this->frequencies[$token] = 0;
@ -138,7 +138,7 @@ class TokenCountVectorizer implements Transformer
++$this->frequencies[$token]; ++$this->frequencies[$token];
} }
private function checkDocumentFrequency(array &$samples) private function checkDocumentFrequency(array &$samples): void
{ {
if ($this->minDF > 0) { if ($this->minDF > 0) {
$beyondMinimum = $this->getBeyondMinimumIndexes(count($samples)); $beyondMinimum = $this->getBeyondMinimumIndexes(count($samples));
@ -148,7 +148,7 @@ class TokenCountVectorizer implements Transformer
} }
} }
private function resetBeyondMinimum(array &$sample, array $beyondMinimum) private function resetBeyondMinimum(array &$sample, array $beyondMinimum): void
{ {
foreach ($beyondMinimum as $index) { foreach ($beyondMinimum as $index) {
$sample[$index] = 0; $sample[$index] = 0;

10
src/Phpml/Helper/OneVsRest.php
View File

@ -28,7 +28,7 @@ trait OneVsRest
/** /**
* Train a binary classifier in the OvR style * Train a binary classifier in the OvR style
*/ */
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
// Clears previous stuff. // Clears previous stuff.
$this->reset(); $this->reset();
@ -36,7 +36,7 @@ trait OneVsRest
$this->trainBylabel($samples, $targets); $this->trainBylabel($samples, $targets);
} }
protected function trainByLabel(array $samples, array $targets, array $allLabels = []) protected function trainByLabel(array $samples, array $targets, array $allLabels = []): void
{ {
// Overwrites the current value if it exist. $allLabels must be provided for each partialTrain run. // Overwrites the current value if it exist. $allLabels must be provided for each partialTrain run.
if (!empty($allLabels)) { if (!empty($allLabels)) {
@ -63,7 +63,7 @@ trait OneVsRest
$this->classifiers[$label] = $this->getClassifierCopy(); $this->classifiers[$label] = $this->getClassifierCopy();
} }
list($binarizedTargets, $classifierLabels) = $this->binarizeTargets($targets, $label); [$binarizedTargets, $classifierLabels] = $this->binarizeTargets($targets, $label);
$this->classifiers[$label]->trainBinary($samples, $binarizedTargets, $classifierLabels); $this->classifiers[$label]->trainBinary($samples, $binarizedTargets, $classifierLabels);
} }
} }
@ -80,7 +80,7 @@ trait OneVsRest
/** /**
* Resets the classifier and the vars internally used by OneVsRest to create multiple classifiers. * Resets the classifier and the vars internally used by OneVsRest to create multiple classifiers.
*/ */
public function reset() public function reset(): void
{ {
$this->classifiers = []; $this->classifiers = [];
$this->allLabels = []; $this->allLabels = [];
@ -158,7 +158,7 @@ trait OneVsRest
* *
* @return void * @return void
*/ */
abstract protected function resetBinary(); abstract protected function resetBinary(): void;
/** /**
* Each classifier that make use of OvR approach should be able to * Each classifier that make use of OvR approach should be able to

4
src/Phpml/Helper/Optimizer/ConjugateGradient.php
View File

@ -61,7 +61,7 @@ class ConjugateGradient extends GD
*/ */
protected function gradient(array $theta) : array protected function gradient(array $theta) : array
{ {
list(, $gradient) = parent::gradient($theta); [, $gradient] = parent::gradient($theta);
return $gradient; return $gradient;
} }
@ -71,7 +71,7 @@ class ConjugateGradient extends GD
*/ */
protected function cost(array $theta) : float protected function cost(array $theta) : float
{ {
list($cost) = parent::gradient($theta); [$cost] = parent::gradient($theta);
return array_sum($cost) / $this->sampleCount; return array_sum($cost) / $this->sampleCount;
} }

8
src/Phpml/Helper/Optimizer/GD.php
View File

@ -31,7 +31,7 @@ class GD extends StochasticGD
$theta = $this->theta; $theta = $this->theta;
// Calculate update terms for each sample // Calculate update terms for each sample
list($errors, $updates, $totalPenalty) = $this->gradient($theta); [$errors, $updates, $totalPenalty] = $this->gradient($theta);
$this->updateWeightsWithUpdates($updates, $totalPenalty); $this->updateWeightsWithUpdates($updates, $totalPenalty);
@ -61,7 +61,7 @@ class GD extends StochasticGD
$target = $this->targets[$index]; $target = $this->targets[$index];
$result = ($this->gradientCb)($theta, $sample, $target); $result = ($this->gradientCb)($theta, $sample, $target);
list($cost, $grad, $penalty) = array_pad($result, 3, 0); [$cost, $grad, $penalty] = array_pad($result, 3, 0);
$costs[] = $cost; $costs[] = $cost;
$gradient[] = $grad; $gradient[] = $grad;
@ -73,7 +73,7 @@ class GD extends StochasticGD
return [$costs, $gradient, $totalPenalty]; return [$costs, $gradient, $totalPenalty];
} }
protected function updateWeightsWithUpdates(array $updates, float $penalty) protected function updateWeightsWithUpdates(array $updates, float $penalty): void
{ {
// Updates all weights at once // Updates all weights at once
for ($i = 0; $i <= $this->dimensions; ++$i) { for ($i = 0; $i <= $this->dimensions; ++$i) {
@ -96,7 +96,7 @@ class GD extends StochasticGD
/** /**
* Clears the optimizer internal vars after the optimization process. * Clears the optimizer internal vars after the optimization process.
*/ */
protected function clear() protected function clear(): void
{ {
$this->sampleCount = null; $this->sampleCount = null;
parent::clear(); parent::clear();

4
src/Phpml/Helper/Optimizer/StochasticGD.php
View File

@ -191,7 +191,7 @@ class StochasticGD extends Optimizer
$result = ($this->gradientCb)($theta, $sample, $target); $result = ($this->gradientCb)($theta, $sample, $target);
list($error, $gradient, $penalty) = array_pad($result, 3, 0); [$error, $gradient, $penalty] = array_pad($result, 3, 0);
// Update bias // Update bias
$this->theta[0] -= $this->learningRate * $gradient; $this->theta[0] -= $this->learningRate * $gradient;
@ -249,7 +249,7 @@ class StochasticGD extends Optimizer
/** /**
* Clears the optimizer internal vars after the optimization process. * Clears the optimizer internal vars after the optimization process.
*/ */
protected function clear() protected function clear(): void
{ {
$this->samples = []; $this->samples = [];
$this->targets = []; $this->targets = [];

2
src/Phpml/Helper/Trainable.php
View File

@ -20,7 +20,7 @@ trait Trainable
* @param array $samples * @param array $samples
* @param array $targets * @param array $targets
*/ */
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
$this->samples = array_merge($this->samples, $samples); $this->samples = array_merge($this->samples, $samples);
$this->targets = array_merge($this->targets, $targets); $this->targets = array_merge($this->targets, $targets);

10
src/Phpml/Math/LinearAlgebra/EigenvalueDecomposition.php
View File

@ -119,7 +119,7 @@ class EigenvalueDecomposition
/** /**
* Symmetric Householder reduction to tridiagonal form. * Symmetric Householder reduction to tridiagonal form.
*/ */
private function tred2() private function tred2(): void
{ {
// This is derived from the Algol procedures tred2 by // This is derived from the Algol procedures tred2 by
// Bowdler, Martin, Reinsch, and Wilkinson, Handbook for // Bowdler, Martin, Reinsch, and Wilkinson, Handbook for
@ -236,7 +236,7 @@ class EigenvalueDecomposition
* Auto. Comp., Vol.ii-Linear Algebra, and the corresponding * Auto. Comp., Vol.ii-Linear Algebra, and the corresponding
* Fortran subroutine in EISPACK. * Fortran subroutine in EISPACK.
*/ */
private function tql2() private function tql2(): void
{ {
for ($i = 1; $i < $this->n; ++$i) { for ($i = 1; $i < $this->n; ++$i) {
$this->e[$i - 1] = $this->e[$i]; $this->e[$i - 1] = $this->e[$i];
@ -343,7 +343,7 @@ class EigenvalueDecomposition
* Vol.ii-Linear Algebra, and the corresponding * Vol.ii-Linear Algebra, and the corresponding
* Fortran subroutines in EISPACK. * Fortran subroutines in EISPACK.
*/ */
private function orthes() private function orthes(): void
{ {
$low = 0; $low = 0;
$high = $this->n - 1; $high = $this->n - 1;
@ -428,7 +428,7 @@ class EigenvalueDecomposition
* @param int|float $yr * @param int|float $yr
* @param int|float $yi * @param int|float $yi
*/ */
private function cdiv($xr, $xi, $yr, $yi) private function cdiv($xr, $xi, $yr, $yi): void
{ {
if (abs($yr) > abs($yi)) { if (abs($yr) > abs($yi)) {
$r = $yi / $yr; $r = $yi / $yr;
@ -451,7 +451,7 @@ class EigenvalueDecomposition
* Vol.ii-Linear Algebra, and the corresponding * Vol.ii-Linear Algebra, and the corresponding
* Fortran subroutine in EISPACK. * Fortran subroutine in EISPACK.
*/ */
private function hqr2() private function hqr2(): void
{ {
// Initialize // Initialize
$nn = $this->n; $nn = $this->n;

6
src/Phpml/Math/Statistic/Covariance.php
View File

@ -13,7 +13,7 @@ class Covariance
* *
* @throws InvalidArgumentException * @throws InvalidArgumentException
*/ */
public static function fromXYArrays(array $x, array $y, bool $sample = true, float $meanX = null, float $meanY = null) : float public static function fromXYArrays(array $x, array $y, bool $sample = true, ?float $meanX = null, ?float $meanY = null) : float
{ {
if (empty($x) || empty($y)) { if (empty($x) || empty($y)) {
throw InvalidArgumentException::arrayCantBeEmpty(); throw InvalidArgumentException::arrayCantBeEmpty();
@ -51,7 +51,7 @@ class Covariance
* @throws InvalidArgumentException * @throws InvalidArgumentException
* @throws \Exception * @throws \Exception
*/ */
public static function fromDataset(array $data, int $i, int $k, bool $sample = true, float $meanX = null, float $meanY = null) : float public static function fromDataset(array $data, int $i, int $k, bool $sample = true, ?float $meanX = null, ?float $meanY = null) : float
{ {
if (empty($data)) { if (empty($data)) {
throw InvalidArgumentException::arrayCantBeEmpty(); throw InvalidArgumentException::arrayCantBeEmpty();
@ -112,7 +112,7 @@ class Covariance
* *
* @param array|null $means * @param array|null $means
*/ */
public static function covarianceMatrix(array $data, array $means = null) : array public static function covarianceMatrix(array $data, ?array $means = null) : array
{ {
$n = count($data[0]); $n = count($data[0]);

2
src/Phpml/Math/Statistic/Mean.php
View File

@ -56,7 +56,7 @@ class Mean
/** /**
* @throws InvalidArgumentException * @throws InvalidArgumentException
*/ */
private static function checkArrayLength(array $array) private static function checkArrayLength(array $array): void
{ {
if (empty($array)) { if (empty($array)) {
throw InvalidArgumentException::arrayCantBeEmpty(); throw InvalidArgumentException::arrayCantBeEmpty();

4
src/Phpml/Metric/ClassificationReport.php
View File

@ -76,7 +76,7 @@ class ClassificationReport
return $this->average; return $this->average;
} }
private function computeMetrics(array $truePositive, array $falsePositive, array $falseNegative) private function computeMetrics(array $truePositive, array $falsePositive, array $falseNegative): void
{ {
foreach ($truePositive as $label => $tp) { foreach ($truePositive as $label => $tp) {
$this->precision[$label] = $this->computePrecision($tp, $falsePositive[$label]); $this->precision[$label] = $this->computePrecision($tp, $falsePositive[$label]);
@ -85,7 +85,7 @@ class ClassificationReport
} }
} }
private function computeAverage() private function computeAverage(): void
{ {
foreach (['precision', 'recall', 'f1score'] as $metric) { foreach (['precision', 'recall', 'f1score'] as $metric) {
$values = array_filter($this->{$metric}); $values = array_filter($this->{$metric});

2
src/Phpml/Metric/ConfusionMatrix.php
View File

@ -6,7 +6,7 @@ namespace Phpml\Metric;
class ConfusionMatrix class ConfusionMatrix
{ {
public static function compute(array $actualLabels, array $predictedLabels, array $labels = null) : array public static function compute(array $actualLabels, array $predictedLabels, ?array $labels = null) : array
{ {
$labels = $labels ? array_flip($labels) : self::getUniqueLabels($actualLabels); $labels = $labels ? array_flip($labels) : self::getUniqueLabels($actualLabels);
$matrix = self::generateMatrixWithZeros($labels); $matrix = self::generateMatrixWithZeros($labels);

2
src/Phpml/ModelManager.php
View File

@ -9,7 +9,7 @@ use Phpml\Exception\SerializeException;
class ModelManager class ModelManager
{ {
public function saveToFile(Estimator $estimator, string $filepath) public function saveToFile(Estimator $estimator, string $filepath): void
{ {
if (!is_writable(dirname($filepath))) { if (!is_writable(dirname($filepath))) {
throw FileException::cantSaveFile(basename($filepath)); throw FileException::cantSaveFile(basename($filepath));

6
src/Phpml/NeuralNetwork/Layer.php
View File

@ -17,7 +17,7 @@ class Layer
/** /**
* @throws InvalidArgumentException * @throws InvalidArgumentException
*/ */
public function __construct(int $nodesNumber = 0, string $nodeClass = Neuron::class, ActivationFunction $activationFunction = null) public function __construct(int $nodesNumber = 0, string $nodeClass = Neuron::class, ?ActivationFunction $activationFunction = null)
{ {
if (!in_array(Node::class, class_implements($nodeClass))) { if (!in_array(Node::class, class_implements($nodeClass))) {
throw InvalidArgumentException::invalidLayerNodeClass(); throw InvalidArgumentException::invalidLayerNodeClass();
@ -33,7 +33,7 @@ class Layer
* *
* @return Neuron * @return Neuron
*/ */
private function createNode(string $nodeClass, ActivationFunction $activationFunction = null) private function createNode(string $nodeClass, ?ActivationFunction $activationFunction = null)
{ {
if (Neuron::class == $nodeClass) { if (Neuron::class == $nodeClass) {
return new Neuron($activationFunction); return new Neuron($activationFunction);
@ -42,7 +42,7 @@ class Layer
return new $nodeClass(); return new $nodeClass();
} }
public function addNode(Node $node) public function addNode(Node $node): void
{ {
$this->nodes[] = $node; $this->nodes[] = $node;
} }

4
src/Phpml/NeuralNetwork/Network/LayeredNetwork.php
View File

@ -16,7 +16,7 @@ abstract class LayeredNetwork implements Network
*/ */
protected $layers; protected $layers;
public function addLayer(Layer $layer) public function addLayer(Layer $layer): void
{ {
$this->layers[] = $layer; $this->layers[] = $layer;
} }
@ -29,7 +29,7 @@ abstract class LayeredNetwork implements Network
return $this->layers; return $this->layers;
} }
public function removeLayers() public function removeLayers(): void
{ {
unset($this->layers); unset($this->layers);
} }

24
src/Phpml/NeuralNetwork/Network/MultilayerPerceptron.php
View File

@ -58,7 +58,7 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
/** /**
* @throws InvalidArgumentException * @throws InvalidArgumentException
*/ */
public function __construct(int $inputLayerFeatures, array $hiddenLayers, array $classes, int $iterations = 10000, ActivationFunction $activationFunction = null, int $theta = 1) public function __construct(int $inputLayerFeatures, array $hiddenLayers, array $classes, int $iterations = 10000, ?ActivationFunction $activationFunction = null, int $theta = 1)
{ {
if (empty($hiddenLayers)) { if (empty($hiddenLayers)) {
throw InvalidArgumentException::invalidLayersNumber(); throw InvalidArgumentException::invalidLayersNumber();
@ -78,7 +78,7 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
$this->initNetwork(); $this->initNetwork();
} }
private function initNetwork() private function initNetwork(): void
{ {
$this->addInputLayer($this->inputLayerFeatures); $this->addInputLayer($this->inputLayerFeatures);
$this->addNeuronLayers($this->hiddenLayers, $this->activationFunction); $this->addNeuronLayers($this->hiddenLayers, $this->activationFunction);
@ -90,7 +90,7 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
$this->backpropagation = new Backpropagation($this->theta); $this->backpropagation = new Backpropagation($this->theta);
} }
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
$this->reset(); $this->reset();
$this->initNetwork(); $this->initNetwork();
@ -100,7 +100,7 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
/** /**
* @throws InvalidArgumentException * @throws InvalidArgumentException
*/ */
public function partialTrain(array $samples, array $targets, array $classes = []) public function partialTrain(array $samples, array $targets, array $classes = []): void
{ {
if (!empty($classes) && array_values($classes) !== $this->classes) { if (!empty($classes) && array_values($classes) !== $this->classes) {
// We require the list of classes in the constructor. // We require the list of classes in the constructor.
@ -122,24 +122,24 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
*/ */
abstract protected function predictSample(array $sample); abstract protected function predictSample(array $sample);
protected function reset() protected function reset(): void
{ {
$this->removeLayers(); $this->removeLayers();
} }
private function addInputLayer(int $nodes) private function addInputLayer(int $nodes): void
{ {
$this->addLayer(new Layer($nodes, Input::class)); $this->addLayer(new Layer($nodes, Input::class));
} }
private function addNeuronLayers(array $layers, ActivationFunction $activationFunction = null) private function addNeuronLayers(array $layers, ?ActivationFunction $activationFunction = null): void
{ {
foreach ($layers as $neurons) { foreach ($layers as $neurons) {
$this->addLayer(new Layer($neurons, Neuron::class, $activationFunction)); $this->addLayer(new Layer($neurons, Neuron::class, $activationFunction));
} }
} }
private function generateSynapses() private function generateSynapses(): void
{ {
$layersNumber = count($this->layers) - 1; $layersNumber = count($this->layers) - 1;
for ($i = 0; $i < $layersNumber; ++$i) { for ($i = 0; $i < $layersNumber; ++$i) {
@ -149,7 +149,7 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
} }
} }
private function addBiasNodes() private function addBiasNodes(): void
{ {
$biasLayers = count($this->layers) - 1; $biasLayers = count($this->layers) - 1;
for ($i = 0; $i < $biasLayers; ++$i) { for ($i = 0; $i < $biasLayers; ++$i) {
@ -157,7 +157,7 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
} }
} }
private function generateLayerSynapses(Layer $nextLayer, Layer $currentLayer) private function generateLayerSynapses(Layer $nextLayer, Layer $currentLayer): void
{ {
foreach ($nextLayer->getNodes() as $nextNeuron) { foreach ($nextLayer->getNodes() as $nextNeuron) {
if ($nextNeuron instanceof Neuron) { if ($nextNeuron instanceof Neuron) {
@ -166,14 +166,14 @@ abstract class MultilayerPerceptron extends LayeredNetwork implements Estimator,
} }
} }
private function generateNeuronSynapses(Layer $currentLayer, Neuron $nextNeuron) private function generateNeuronSynapses(Layer $currentLayer, Neuron $nextNeuron): void
{ {
foreach ($currentLayer->getNodes() as $currentNeuron) { foreach ($currentLayer->getNodes() as $currentNeuron) {
$nextNeuron->addSynapse(new Synapse($currentNeuron)); $nextNeuron->addSynapse(new Synapse($currentNeuron));
} }
} }
private function trainSamples(array $samples, array $targets) private function trainSamples(array $samples, array $targets): void
{ {
foreach ($targets as $key => $target) { foreach ($targets as $key => $target) {
$this->trainSample($samples[$key], $target); $this->trainSample($samples[$key], $target);

2
src/Phpml/NeuralNetwork/Node/Input.php
View File

@ -23,7 +23,7 @@ class Input implements Node
return $this->input; return $this->input;
} }
public function setInput(float $input) public function setInput(float $input): void
{ {
$this->input = $input; $this->input = $input;
} }

6
src/Phpml/NeuralNetwork/Node/Neuron.php
View File

@ -25,14 +25,14 @@ class Neuron implements Node
*/ */
protected $output; protected $output;
public function __construct(ActivationFunction $activationFunction = null) public function __construct(?ActivationFunction $activationFunction = null)
{ {
$this->activationFunction = $activationFunction ?: new ActivationFunction\Sigmoid(); $this->activationFunction = $activationFunction ?: new ActivationFunction\Sigmoid();
$this->synapses = []; $this->synapses = [];
$this->output = 0; $this->output = 0;
} }
public function addSynapse(Synapse $synapse) public function addSynapse(Synapse $synapse): void
{ {
$this->synapses[] = $synapse; $this->synapses[] = $synapse;
} }
@ -59,7 +59,7 @@ class Neuron implements Node
return $this->output; return $this->output;
} }
public function reset() public function reset(): void
{ {
$this->output = 0; $this->output = 0;
} }

4
src/Phpml/NeuralNetwork/Node/Neuron/Synapse.php
View File

@ -21,7 +21,7 @@ class Synapse
/** /**
* @param float|null $weight * @param float|null $weight
*/ */
public function __construct(Node $node, float $weight = null) public function __construct(Node $node, ?float $weight = null)
{ {
$this->node = $node; $this->node = $node;
$this->weight = $weight ?: $this->generateRandomWeight(); $this->weight = $weight ?: $this->generateRandomWeight();
@ -37,7 +37,7 @@ class Synapse
return $this->weight * $this->node->getOutput(); return $this->weight * $this->node->getOutput();
} }
public function changeWeight(float $delta) public function changeWeight(float $delta): void
{ {
$this->weight += $delta; $this->weight += $delta;
} }

2
src/Phpml/NeuralNetwork/Training/Backpropagation.php
View File

@ -32,7 +32,7 @@ class Backpropagation
/** /**
* @param mixed $targetClass * @param mixed $targetClass
*/ */
public function backpropagate(array $layers, $targetClass) public function backpropagate(array $layers, $targetClass): void
{ {
$layersNumber = count($layers); $layersNumber = count($layers);

8
src/Phpml/Pipeline.php
View File

@ -28,12 +28,12 @@ class Pipeline implements Estimator
$this->estimator = $estimator; $this->estimator = $estimator;
} }
public function addTransformer(Transformer $transformer) public function addTransformer(Transformer $transformer): void
{ {
$this->transformers[] = $transformer; $this->transformers[] = $transformer;
} }
public function setEstimator(Estimator $estimator) public function setEstimator(Estimator $estimator): void
{ {
$this->estimator = $estimator; $this->estimator = $estimator;
} }
@ -51,7 +51,7 @@ class Pipeline implements Estimator
return $this->estimator; return $this->estimator;
} }
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
foreach ($this->transformers as $transformer) { foreach ($this->transformers as $transformer) {
$transformer->fit($samples); $transformer->fit($samples);
@ -71,7 +71,7 @@ class Pipeline implements Estimator
return $this->estimator->predict($samples); return $this->estimator->predict($samples);
} }
private function transformSamples(array &$samples) private function transformSamples(array &$samples): void
{ {
foreach ($this->transformers as $transformer) { foreach ($this->transformers as $transformer) {
$transformer->transform($samples); $transformer->transform($samples);

10
src/Phpml/Preprocessing/Imputer.php
View File

@ -8,8 +8,8 @@ use Phpml\Preprocessing\Imputer\Strategy;
class Imputer implements Preprocessor class Imputer implements Preprocessor
{ {
const AXIS_COLUMN = 0; public const AXIS_COLUMN = 0;
const AXIS_ROW = 1; public const AXIS_ROW = 1;
/** /**
* @var mixed * @var mixed
@ -43,19 +43,19 @@ class Imputer implements Preprocessor
$this->samples = $samples; $this->samples = $samples;
} }
public function fit(array $samples) public function fit(array $samples): void
{ {
$this->samples = $samples; $this->samples = $samples;
} }
public function transform(array &$samples) public function transform(array &$samples): void
{ {
foreach ($samples as &$sample) { foreach ($samples as &$sample) {
$this->preprocessSample($sample); $this->preprocessSample($sample);
} }
} }
private function preprocessSample(array &$sample) private function preprocessSample(array &$sample): void
{ {
foreach ($sample as $column => &$value) { foreach ($sample as $column => &$value) {
if ($value === $this->missingValue) { if ($value === $this->missingValue) {

16
src/Phpml/Preprocessing/Normalizer.php
View File

@ -10,9 +10,9 @@ use Phpml\Math\Statistic\StandardDeviation;
class Normalizer implements Preprocessor class Normalizer implements Preprocessor
{ {
const NORM_L1 = 1; public const NORM_L1 = 1;
const NORM_L2 = 2; public const NORM_L2 = 2;
const NORM_STD = 3; public const NORM_STD = 3;
/** /**
* @var int * @var int
@ -46,7 +46,7 @@ class Normalizer implements Preprocessor
$this->norm = $norm; $this->norm = $norm;
} }
public function fit(array $samples) public function fit(array $samples): void
{ {
if ($this->fitted) { if ($this->fitted) {
return; return;
@ -64,7 +64,7 @@ class Normalizer implements Preprocessor
$this->fitted = true; $this->fitted = true;
} }
public function transform(array &$samples) public function transform(array &$samples): void
{ {
$methods = [ $methods = [
self::NORM_L1 => 'normalizeL1', self::NORM_L1 => 'normalizeL1',
@ -80,7 +80,7 @@ class Normalizer implements Preprocessor
} }
} }
private function normalizeL1(array &$sample) private function normalizeL1(array &$sample): void
{ {
$norm1 = 0; $norm1 = 0;
foreach ($sample as $feature) { foreach ($sample as $feature) {
@ -97,7 +97,7 @@ class Normalizer implements Preprocessor
} }
} }
private function normalizeL2(array &$sample) private function normalizeL2(array &$sample): void
{ {
$norm2 = 0; $norm2 = 0;
foreach ($sample as $feature) { foreach ($sample as $feature) {
@ -114,7 +114,7 @@ class Normalizer implements Preprocessor
} }
} }
private function normalizeSTD(array &$sample) private function normalizeSTD(array &$sample): void
{ {
foreach ($sample as $i => $val) { foreach ($sample as $i => $val) {
if ($this->std[$i] != 0) { if ($this->std[$i] != 0) {

4
src/Phpml/Regression/LeastSquares.php
View File

@ -30,7 +30,7 @@ class LeastSquares implements Regression
*/ */
private $coefficients; private $coefficients;
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
$this->samples = array_merge($this->samples, $samples); $this->samples = array_merge($this->samples, $samples);
$this->targets = array_merge($this->targets, $targets); $this->targets = array_merge($this->targets, $targets);
@ -64,7 +64,7 @@ class LeastSquares implements Regression
/** /**
* coefficient(b) = (X'X)-1X'Y. * coefficient(b) = (X'X)-1X'Y.
*/ */
private function computeCoefficients() private function computeCoefficients(): void
{ {
$samplesMatrix = $this->getSamplesMatrix(); $samplesMatrix = $this->getSamplesMatrix();
$targetsMatrix = $this->getTargetsMatrix(); $targetsMatrix = $this->getTargetsMatrix();

2
src/Phpml/Regression/SVR.php
View File

@ -15,7 +15,7 @@ class SVR extends SupportVectorMachine implements Regression
int $degree = 3, int $degree = 3,
float $epsilon = 0.1, float $epsilon = 0.1,
float $cost = 1.0, float $cost = 1.0,
float $gamma = null, ?float $gamma = null,
float $coef0 = 0.0, float $coef0 = 0.0,
float $tolerance = 0.001, float $tolerance = 0.001,
int $cacheSize = 100, int $cacheSize = 100,

8
src/Phpml/SupportVectorMachine/Kernel.php
View File

@ -9,20 +9,20 @@ abstract class Kernel
/** /**
* u'*v. * u'*v.
*/ */
const LINEAR = 0; public const LINEAR = 0;
/** /**
* (gamma*u'*v + coef0)^degree. * (gamma*u'*v + coef0)^degree.
*/ */
const POLYNOMIAL = 1; public const POLYNOMIAL = 1;
/** /**
* exp(-gamma*|u-v|^2). * exp(-gamma*|u-v|^2).
*/ */
const RBF = 2; public const RBF = 2;
/** /**
* tanh(gamma*u'*v + coef0). * tanh(gamma*u'*v + coef0).
*/ */
const SIGMOID = 3; public const SIGMOID = 3;
} }

12
src/Phpml/SupportVectorMachine/SupportVectorMachine.php
View File

@ -97,7 +97,7 @@ class SupportVectorMachine
float $cost = 1.0, float $cost = 1.0,
float $nu = 0.5, float $nu = 0.5,
int $degree = 3, int $degree = 3,
float $gamma = null, ?float $gamma = null,
float $coef0 = 0.0, float $coef0 = 0.0,
float $epsilon = 0.1, float $epsilon = 0.1,
float $tolerance = 0.001, float $tolerance = 0.001,
@ -124,7 +124,7 @@ class SupportVectorMachine
$this->varPath = $rootPath.'var'.DIRECTORY_SEPARATOR; $this->varPath = $rootPath.'var'.DIRECTORY_SEPARATOR;
} }
public function setBinPath(string $binPath) public function setBinPath(string $binPath): void
{ {
$this->ensureDirectorySeparator($binPath); $this->ensureDirectorySeparator($binPath);
$this->verifyBinPath($binPath); $this->verifyBinPath($binPath);
@ -132,7 +132,7 @@ class SupportVectorMachine
$this->binPath = $binPath; $this->binPath = $binPath;
} }
public function setVarPath(string $varPath) public function setVarPath(string $varPath): void
{ {
if (!is_writable($varPath)) { if (!is_writable($varPath)) {
throw InvalidArgumentException::pathNotWritable($varPath); throw InvalidArgumentException::pathNotWritable($varPath);
@ -142,7 +142,7 @@ class SupportVectorMachine
$this->varPath = $varPath; $this->varPath = $varPath;
} }
public function train(array $samples, array $targets) public function train(array $samples, array $targets): void
{ {
$this->samples = array_merge($this->samples, $samples); $this->samples = array_merge($this->samples, $samples);
$this->targets = array_merge($this->targets, $targets); $this->targets = array_merge($this->targets, $targets);
@ -234,14 +234,14 @@ class SupportVectorMachine
); );
} }
private function ensureDirectorySeparator(string &$path) private function ensureDirectorySeparator(string &$path): void
{ {
if (substr($path, -1) !== DIRECTORY_SEPARATOR) { if (substr($path, -1) !== DIRECTORY_SEPARATOR) {
$path .= DIRECTORY_SEPARATOR; $path .= DIRECTORY_SEPARATOR;
} }
} }
private function verifyBinPath(string $path) private function verifyBinPath(string $path): void
{ {
if (!is_dir($path)) { if (!is_dir($path)) {
throw InvalidArgumentException::pathNotFound($path); throw InvalidArgumentException::pathNotFound($path);

10
src/Phpml/SupportVectorMachine/Type.php
View File

@ -9,25 +9,25 @@ abstract class Type
/** /**
* classification. * classification.
*/ */
const C_SVC = 0; public const C_SVC = 0;
/** /**
* classification. * classification.
*/ */
const NU_SVC = 1; public const NU_SVC = 1;
/** /**
* distribution estimation. * distribution estimation.
*/ */
const ONE_CLASS_SVM = 2; public const ONE_CLASS_SVM = 2;
/** /**
* regression. * regression.
*/ */
const EPSILON_SVR = 3; public const EPSILON_SVR = 3;
/** /**
* regression. * regression.
*/ */
const NU_SVR = 4; public const NU_SVR = 4;
} }

30
tests/Phpml/Association/AprioriTest.php
View File

@ -40,7 +40,7 @@ class AprioriTest extends TestCase
[2, 4], [2, 4],
]; ];
public function testGreek() public function testGreek(): void
{ {
$apriori = new Apriori(0.5, 0.5); $apriori = new Apriori(0.5, 0.5);
$apriori->train($this->sampleGreek, []); $apriori->train($this->sampleGreek, []);
@ -49,14 +49,14 @@ class AprioriTest extends TestCase
$this->assertEquals('alpha', $apriori->predict([['alpha', 'epsilon'], ['beta', 'theta']])[1][0][0]); $this->assertEquals('alpha', $apriori->predict([['alpha', 'epsilon'], ['beta', 'theta']])[1][0][0]);
} }
public function testPowerSet() public function testPowerSet(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
$this->assertCount(8, $this->invoke($apriori, 'powerSet', [['a', 'b', 'c']])); $this->assertCount(8, $this->invoke($apriori, 'powerSet', [['a', 'b', 'c']]));
} }
public function testApriori() public function testApriori(): void
{ {
$apriori = new Apriori(3 / 7); $apriori = new Apriori(3 / 7);
$apriori->train($this->sampleBasket, []); $apriori->train($this->sampleBasket, []);
@ -73,7 +73,7 @@ class AprioriTest extends TestCase
$this->assertTrue($this->invoke($apriori, 'contains', [$L[2], [3, 4]])); $this->assertTrue($this->invoke($apriori, 'contains', [$L[2], [3, 4]]));
} }
public function testGetRules() public function testGetRules(): void
{ {
$apriori = new Apriori(0.4, 0.8); $apriori = new Apriori(0.4, 0.8);
$apriori->train($this->sampleChars, []); $apriori->train($this->sampleChars, []);
@ -81,21 +81,21 @@ class AprioriTest extends TestCase
$this->assertCount(19, $apriori->getRules()); $this->assertCount(19, $apriori->getRules());
} }
public function testAntecedents() public function testAntecedents(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
$this->assertCount(6, $this->invoke($apriori, 'antecedents', [['a', 'b', 'c']])); $this->assertCount(6, $this->invoke($apriori, 'antecedents', [['a', 'b', 'c']]));
} }
public function testItems() public function testItems(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
$apriori->train($this->sampleGreek, []); $apriori->train($this->sampleGreek, []);
$this->assertCount(4, $this->invoke($apriori, 'items', [])); $this->assertCount(4, $this->invoke($apriori, 'items', []));
} }
public function testFrequent() public function testFrequent(): void
{ {
$apriori = new Apriori(0.51); $apriori = new Apriori(0.51);
$apriori->train($this->sampleGreek, []); $apriori->train($this->sampleGreek, []);
@ -104,7 +104,7 @@ class AprioriTest extends TestCase
$this->assertCount(2, $this->invoke($apriori, 'frequent', [[['alpha'], ['beta']]])); $this->assertCount(2, $this->invoke($apriori, 'frequent', [[['alpha'], ['beta']]]));
} }
public function testCandidates() public function testCandidates(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
$apriori->train($this->sampleGreek, []); $apriori->train($this->sampleGreek, []);
@ -115,7 +115,7 @@ class AprioriTest extends TestCase
$this->assertCount(3, $this->invoke($apriori, 'candidates', [[['alpha'], ['beta'], ['theta']]])); $this->assertCount(3, $this->invoke($apriori, 'candidates', [[['alpha'], ['beta'], ['theta']]]));
} }
public function testConfidence() public function testConfidence(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
$apriori->train($this->sampleGreek, []); $apriori->train($this->sampleGreek, []);
@ -124,7 +124,7 @@ class AprioriTest extends TestCase
$this->assertEquals(1, $this->invoke($apriori, 'confidence', [['alpha', 'beta'], ['alpha']])); $this->assertEquals(1, $this->invoke($apriori, 'confidence', [['alpha', 'beta'], ['alpha']]));
} }
public function testSupport() public function testSupport(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
$apriori->train($this->sampleGreek, []); $apriori->train($this->sampleGreek, []);
@ -133,7 +133,7 @@ class AprioriTest extends TestCase
$this->assertEquals(0.5, $this->invoke($apriori, 'support', [['epsilon']])); $this->assertEquals(0.5, $this->invoke($apriori, 'support', [['epsilon']]));
} }
public function testFrequency() public function testFrequency(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
$apriori->train($this->sampleGreek, []); $apriori->train($this->sampleGreek, []);
@ -142,7 +142,7 @@ class AprioriTest extends TestCase
$this->assertEquals(2, $this->invoke($apriori, 'frequency', [['epsilon']])); $this->assertEquals(2, $this->invoke($apriori, 'frequency', [['epsilon']]));
} }
public function testContains() public function testContains(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
@ -151,7 +151,7 @@ class AprioriTest extends TestCase
$this->assertFalse($this->invoke($apriori, 'contains', [[['a'], ['b']], ['c']])); $this->assertFalse($this->invoke($apriori, 'contains', [[['a'], ['b']], ['c']]));
} }
public function testSubset() public function testSubset(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
@ -160,7 +160,7 @@ class AprioriTest extends TestCase
$this->assertFalse($this->invoke($apriori, 'subset', [['a'], ['a', 'b']])); $this->assertFalse($this->invoke($apriori, 'subset', [['a'], ['a', 'b']]));
} }
public function testEquals() public function testEquals(): void
{ {
$apriori = new Apriori(); $apriori = new Apriori();
@ -187,7 +187,7 @@ class AprioriTest extends TestCase
return $method->invokeArgs($object, $params); return $method->invokeArgs($object, $params);
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
$classifier = new Apriori(0.5, 0.5); $classifier = new Apriori(0.5, 0.5);
$classifier->train($this->sampleGreek, []); $classifier->train($this->sampleGreek, []);

2
tests/Phpml/Classification/DecisionTree/DecisionTreeLeafTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class DecisionTreeLeafTest extends TestCase class DecisionTreeLeafTest extends TestCase
{ {
public function testHTMLOutput() public function testHTMLOutput(): void
{ {
$leaf = new DecisionTreeLeaf(); $leaf = new DecisionTreeLeaf();
$leaf->value = 1; $leaf->value = 1;

14
tests/Phpml/Classification/DecisionTreeTest.php
View File

@ -35,7 +35,7 @@ class DecisionTreeTest extends TestCase
private function getData($input) private function getData($input)
{ {
$targets = array_column($input, 4); $targets = array_column($input, 4);
array_walk($input, function (&$v) { array_walk($input, function (&$v): void {
array_splice($v, 4, 1); array_splice($v, 4, 1);
}); });
@ -44,14 +44,14 @@ class DecisionTreeTest extends TestCase
public function testPredictSingleSample() public function testPredictSingleSample()
{ {
list($data, $targets) = $this->getData($this->data); [$data, $targets] = $this->getData($this->data);
$classifier = new DecisionTree(5); $classifier = new DecisionTree(5);
$classifier->train($data, $targets); $classifier->train($data, $targets);
$this->assertEquals('Dont_play', $classifier->predict(['sunny', 78, 72, 'false'])); $this->assertEquals('Dont_play', $classifier->predict(['sunny', 78, 72, 'false']));
$this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false'])); $this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false']));
$this->assertEquals('Dont_play', $classifier->predict(['rain', 60, 60, 'true'])); $this->assertEquals('Dont_play', $classifier->predict(['rain', 60, 60, 'true']));
list($data, $targets) = $this->getData($this->extraData); [$data, $targets] = $this->getData($this->extraData);
$classifier->train($data, $targets); $classifier->train($data, $targets);
$this->assertEquals('Dont_play', $classifier->predict(['scorching', 95, 90, 'true'])); $this->assertEquals('Dont_play', $classifier->predict(['scorching', 95, 90, 'true']));
$this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false'])); $this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false']));
@ -59,9 +59,9 @@ class DecisionTreeTest extends TestCase
return $classifier; return $classifier;
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
list($data, $targets) = $this->getData($this->data); [$data, $targets] = $this->getData($this->data);
$classifier = new DecisionTree(5); $classifier = new DecisionTree(5);
$classifier->train($data, $targets); $classifier->train($data, $targets);
@ -78,9 +78,9 @@ class DecisionTreeTest extends TestCase
$this->assertEquals($predicted, $restoredClassifier->predict($testSamples)); $this->assertEquals($predicted, $restoredClassifier->predict($testSamples));
} }
public function testTreeDepth() public function testTreeDepth(): void
{ {
list($data, $targets) = $this->getData($this->data); [$data, $targets] = $this->getData($this->data);
$classifier = new DecisionTree(5); $classifier = new DecisionTree(5);
$classifier->train($data, $targets); $classifier->train($data, $targets);
$this->assertTrue(5 >= $classifier->actualDepth); $this->assertTrue(5 >= $classifier->actualDepth);

2
tests/Phpml/Classification/Ensemble/AdaBoostTest.php
View File

@ -42,7 +42,7 @@ class AdaBoostTest extends TestCase
return $classifier; return $classifier;
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
// Instantinate new Percetron trained for OR problem // Instantinate new Percetron trained for OR problem
$samples = [[0, 0], [1, 0], [0, 1], [1, 1]]; $samples = [[0, 0], [1, 0], [0, 1], [1, 1]];

14
tests/Phpml/Classification/Ensemble/BaggingTest.php
View File

@ -36,7 +36,7 @@ class BaggingTest extends TestCase
public function testPredictSingleSample() public function testPredictSingleSample()
{ {
list($data, $targets) = $this->getData($this->data); [$data, $targets] = $this->getData($this->data);
$classifier = $this->getClassifier(); $classifier = $this->getClassifier();
// Testing with default options // Testing with default options
$classifier->train($data, $targets); $classifier->train($data, $targets);
@ -44,7 +44,7 @@ class BaggingTest extends TestCase
$this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false'])); $this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false']));
$this->assertEquals('Dont_play', $classifier->predict(['rain', 60, 60, 'true'])); $this->assertEquals('Dont_play', $classifier->predict(['rain', 60, 60, 'true']));
list($data, $targets) = $this->getData($this->extraData); [$data, $targets] = $this->getData($this->extraData);
$classifier->train($data, $targets); $classifier->train($data, $targets);
$this->assertEquals('Dont_play', $classifier->predict(['scorching', 95, 90, 'true'])); $this->assertEquals('Dont_play', $classifier->predict(['scorching', 95, 90, 'true']));
$this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false'])); $this->assertEquals('Play', $classifier->predict(['overcast', 60, 60, 'false']));
@ -52,9 +52,9 @@ class BaggingTest extends TestCase
return $classifier; return $classifier;
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
list($data, $targets) = $this->getData($this->data); [$data, $targets] = $this->getData($this->data);
$classifier = $this->getClassifier(5); $classifier = $this->getClassifier(5);
$classifier->train($data, $targets); $classifier->train($data, $targets);
@ -71,9 +71,9 @@ class BaggingTest extends TestCase
$this->assertEquals($predicted, $restoredClassifier->predict($testSamples)); $this->assertEquals($predicted, $restoredClassifier->predict($testSamples));
} }
public function testBaseClassifiers() public function testBaseClassifiers(): void
{ {
list($data, $targets) = $this->getData($this->data); [$data, $targets] = $this->getData($this->data);
$baseClassifiers = $this->getAvailableBaseClassifiers(); $baseClassifiers = $this->getAvailableBaseClassifiers();
foreach ($baseClassifiers as $base => $params) { foreach ($baseClassifiers as $base => $params) {
@ -119,7 +119,7 @@ class BaggingTest extends TestCase
} }
shuffle($populated); shuffle($populated);
$targets = array_column($populated, 4); $targets = array_column($populated, 4);
array_walk($populated, function (&$v) { array_walk($populated, function (&$v): void {
array_splice($v, 4, 1); array_splice($v, 4, 1);
}); });

2
tests/Phpml/Classification/Ensemble/RandomForestTest.php
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@ -23,7 +23,7 @@ class RandomForestTest extends BaggingTest
return [DecisionTree::class => ['depth' => 5]]; return [DecisionTree::class => ['depth' => 5]];
} }
public function testOtherBaseClassifier() public function testOtherBaseClassifier(): void
{ {
try { try {
$classifier = new RandomForest(); $classifier = new RandomForest();

8
tests/Phpml/Classification/KNearestNeighborsTest.php
View File

@ -11,7 +11,7 @@ use PHPUnit\Framework\TestCase;
class KNearestNeighborsTest extends TestCase class KNearestNeighborsTest extends TestCase
{ {
public function testPredictSingleSampleWithDefaultK() public function testPredictSingleSampleWithDefaultK(): void
{ {
$samples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]]; $samples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]];
$labels = ['a', 'a', 'a', 'b', 'b', 'b']; $labels = ['a', 'a', 'a', 'b', 'b', 'b'];
@ -30,7 +30,7 @@ class KNearestNeighborsTest extends TestCase
$this->assertEquals('a', $classifier->predict([3, 10])); $this->assertEquals('a', $classifier->predict([3, 10]));
} }
public function testPredictArrayOfSamples() public function testPredictArrayOfSamples(): void
{ {
$trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]]; $trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]];
$trainLabels = ['a', 'a', 'a', 'b', 'b', 'b']; $trainLabels = ['a', 'a', 'a', 'b', 'b', 'b'];
@ -45,7 +45,7 @@ class KNearestNeighborsTest extends TestCase
$this->assertEquals($testLabels, $predicted); $this->assertEquals($testLabels, $predicted);
} }
public function testPredictArrayOfSamplesUsingChebyshevDistanceMetric() public function testPredictArrayOfSamplesUsingChebyshevDistanceMetric(): void
{ {
$trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]]; $trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]];
$trainLabels = ['a', 'a', 'a', 'b', 'b', 'b']; $trainLabels = ['a', 'a', 'a', 'b', 'b', 'b'];
@ -60,7 +60,7 @@ class KNearestNeighborsTest extends TestCase
$this->assertEquals($testLabels, $predicted); $this->assertEquals($testLabels, $predicted);
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
$trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]]; $trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]];
$trainLabels = ['a', 'a', 'a', 'b', 'b', 'b']; $trainLabels = ['a', 'a', 'a', 'b', 'b', 'b'];

4
tests/Phpml/Classification/Linear/AdalineTest.php
View File

@ -10,7 +10,7 @@ use PHPUnit\Framework\TestCase;
class AdalineTest extends TestCase class AdalineTest extends TestCase
{ {
public function testPredictSingleSample() public function testPredictSingleSample(): void
{ {
// AND problem // AND problem
$samples = [[0, 0], [1, 0], [0, 1], [1, 1]]; $samples = [[0, 0], [1, 0], [0, 1], [1, 1]];
@ -64,7 +64,7 @@ class AdalineTest extends TestCase
$this->assertEquals(1, $classifier->predict([3.0, 9.5])); $this->assertEquals(1, $classifier->predict([3.0, 9.5]));
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
// Instantinate new Percetron trained for OR problem // Instantinate new Percetron trained for OR problem
$samples = [[0, 0], [1, 0], [0, 1], [1, 1]]; $samples = [[0, 0], [1, 0], [0, 1], [1, 1]];

2
tests/Phpml/Classification/Linear/DecisionStumpTest.php
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@ -53,7 +53,7 @@ class DecisionStumpTest extends TestCase
return $classifier; return $classifier;
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
// Instantinate new Percetron trained for OR problem // Instantinate new Percetron trained for OR problem
$samples = [[0, 0], [1, 0], [0, 1], [1, 1]]; $samples = [[0, 0], [1, 0], [0, 1], [1, 1]];

4
tests/Phpml/Classification/Linear/PerceptronTest.php
View File

@ -10,7 +10,7 @@ use PHPUnit\Framework\TestCase;
class PerceptronTest extends TestCase class PerceptronTest extends TestCase
{ {
public function testPredictSingleSample() public function testPredictSingleSample(): void
{ {
// AND problem // AND problem
$samples = [[0, 0], [1, 0], [0, 1], [1, 1], [0.6, 0.6]]; $samples = [[0, 0], [1, 0], [0, 1], [1, 1], [0.6, 0.6]];
@ -67,7 +67,7 @@ class PerceptronTest extends TestCase
$this->assertEquals(1, $classifier->predict([3.0, 9.5])); $this->assertEquals(1, $classifier->predict([3.0, 9.5]));
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
// Instantinate new Percetron trained for OR problem // Instantinate new Percetron trained for OR problem
$samples = [[0, 0], [1, 0], [0, 1], [1, 1]]; $samples = [[0, 0], [1, 0], [0, 1], [1, 1]];

22
tests/Phpml/Classification/MLPClassifierTest.php
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@ -11,7 +11,7 @@ use PHPUnit\Framework\TestCase;
class MLPClassifierTest extends TestCase class MLPClassifierTest extends TestCase
{ {
public function testMLPClassifierLayersInitialization() public function testMLPClassifierLayersInitialization(): void
{ {
$mlp = new MLPClassifier(2, [2], [0, 1]); $mlp = new MLPClassifier(2, [2], [0, 1]);
@ -32,7 +32,7 @@ class MLPClassifierTest extends TestCase
$this->assertContainsOnly(Neuron::class, $layers[2]->getNodes()); $this->assertContainsOnly(Neuron::class, $layers[2]->getNodes());
} }
public function testSynapsesGeneration() public function testSynapsesGeneration(): void
{ {
$mlp = new MLPClassifier(2, [2], [0, 1]); $mlp = new MLPClassifier(2, [2], [0, 1]);
$layers = $mlp->getLayers(); $layers = $mlp->getLayers();
@ -50,7 +50,7 @@ class MLPClassifierTest extends TestCase
} }
} }
public function testBackpropagationLearning() public function testBackpropagationLearning(): void
{ {
// Single layer 2 classes. // Single layer 2 classes.
$network = new MLPClassifier(2, [2], ['a', 'b']); $network = new MLPClassifier(2, [2], ['a', 'b']);
@ -65,7 +65,7 @@ class MLPClassifierTest extends TestCase
$this->assertEquals('b', $network->predict([0, 0])); $this->assertEquals('b', $network->predict([0, 0]));
} }
public function testBackpropagationTrainingReset() public function testBackpropagationTrainingReset(): void
{ {
// Single layer 2 classes. // Single layer 2 classes.
$network = new MLPClassifier(2, [2], ['a', 'b'], 1000); $network = new MLPClassifier(2, [2], ['a', 'b'], 1000);
@ -86,7 +86,7 @@ class MLPClassifierTest extends TestCase
$this->assertEquals('a', $network->predict([0, 1])); $this->assertEquals('a', $network->predict([0, 1]));
} }
public function testBackpropagationPartialTraining() public function testBackpropagationPartialTraining(): void
{ {
// Single layer 2 classes. // Single layer 2 classes.
$network = new MLPClassifier(2, [2], ['a', 'b'], 1000); $network = new MLPClassifier(2, [2], ['a', 'b'], 1000);
@ -109,7 +109,7 @@ class MLPClassifierTest extends TestCase
$this->assertEquals('b', $network->predict([0, 0])); $this->assertEquals('b', $network->predict([0, 0]));
} }
public function testBackpropagationLearningMultilayer() public function testBackpropagationLearningMultilayer(): void
{ {
// Multi-layer 2 classes. // Multi-layer 2 classes.
$network = new MLPClassifier(5, [3, 2], ['a', 'b']); $network = new MLPClassifier(5, [3, 2], ['a', 'b']);
@ -124,7 +124,7 @@ class MLPClassifierTest extends TestCase
$this->assertEquals('b', $network->predict([0, 0, 0, 0, 0])); $this->assertEquals('b', $network->predict([0, 0, 0, 0, 0]));
} }
public function testBackpropagationLearningMulticlass() public function testBackpropagationLearningMulticlass(): void
{ {
// Multi-layer more than 2 classes. // Multi-layer more than 2 classes.
$network = new MLPClassifier(5, [3, 2], ['a', 'b', 4]); $network = new MLPClassifier(5, [3, 2], ['a', 'b', 4]);
@ -140,7 +140,7 @@ class MLPClassifierTest extends TestCase
$this->assertEquals(4, $network->predict([0, 0, 0, 0, 0])); $this->assertEquals(4, $network->predict([0, 0, 0, 0, 0]));
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
// Instantinate new Percetron trained for OR problem // Instantinate new Percetron trained for OR problem
$samples = [[0, 0], [1, 0], [0, 1], [1, 1]]; $samples = [[0, 0], [1, 0], [0, 1], [1, 1]];
@ -163,7 +163,7 @@ class MLPClassifierTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidLayersNumber() public function testThrowExceptionOnInvalidLayersNumber(): void
{ {
new MLPClassifier(2, [], [0, 1]); new MLPClassifier(2, [], [0, 1]);
} }
@ -171,7 +171,7 @@ class MLPClassifierTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidPartialTrainingClasses() public function testThrowExceptionOnInvalidPartialTrainingClasses(): void
{ {
$classifier = new MLPClassifier(2, [2], [0, 1]); $classifier = new MLPClassifier(2, [2], [0, 1]);
$classifier->partialTrain( $classifier->partialTrain(
@ -184,7 +184,7 @@ class MLPClassifierTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidClassesNumber() public function testThrowExceptionOnInvalidClassesNumber(): void
{ {
new MLPClassifier(2, [2], [0]); new MLPClassifier(2, [2], [0]);
} }

6
tests/Phpml/Classification/NaiveBayesTest.php
View File

@ -10,7 +10,7 @@ use PHPUnit\Framework\TestCase;
class NaiveBayesTest extends TestCase class NaiveBayesTest extends TestCase
{ {
public function testPredictSingleSample() public function testPredictSingleSample(): void
{ {
$samples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]]; $samples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]];
$labels = ['a', 'b', 'c']; $labels = ['a', 'b', 'c'];
@ -23,7 +23,7 @@ class NaiveBayesTest extends TestCase
$this->assertEquals('c', $classifier->predict([1, 1, 6])); $this->assertEquals('c', $classifier->predict([1, 1, 6]));
} }
public function testPredictArrayOfSamples() public function testPredictArrayOfSamples(): void
{ {
$trainSamples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]]; $trainSamples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]];
$trainLabels = ['a', 'b', 'c']; $trainLabels = ['a', 'b', 'c'];
@ -47,7 +47,7 @@ class NaiveBayesTest extends TestCase
$this->assertEquals($testLabels, $classifier->predict($testSamples)); $this->assertEquals($testLabels, $classifier->predict($testSamples));
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
$trainSamples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]]; $trainSamples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]];
$trainLabels = ['a', 'b', 'c']; $trainLabels = ['a', 'b', 'c'];

6
tests/Phpml/Classification/SVCTest.php
View File

@ -11,7 +11,7 @@ use PHPUnit\Framework\TestCase;
class SVCTest extends TestCase class SVCTest extends TestCase
{ {
public function testPredictSingleSampleWithLinearKernel() public function testPredictSingleSampleWithLinearKernel(): void
{ {
$samples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]]; $samples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]];
$labels = ['a', 'a', 'a', 'b', 'b', 'b']; $labels = ['a', 'a', 'a', 'b', 'b', 'b'];
@ -30,7 +30,7 @@ class SVCTest extends TestCase
$this->assertEquals('a', $classifier->predict([3, 10])); $this->assertEquals('a', $classifier->predict([3, 10]));
} }
public function testPredictArrayOfSamplesWithLinearKernel() public function testPredictArrayOfSamplesWithLinearKernel(): void
{ {
$trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]]; $trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]];
$trainLabels = ['a', 'a', 'a', 'b', 'b', 'b']; $trainLabels = ['a', 'a', 'a', 'b', 'b', 'b'];
@ -45,7 +45,7 @@ class SVCTest extends TestCase
$this->assertEquals($testLabels, $predictions); $this->assertEquals($testLabels, $predictions);
} }
public function testSaveAndRestore() public function testSaveAndRestore(): void
{ {
$trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]]; $trainSamples = [[1, 3], [1, 4], [2, 4], [3, 1], [4, 1], [4, 2]];
$trainLabels = ['a', 'a', 'a', 'b', 'b', 'b']; $trainLabels = ['a', 'a', 'a', 'b', 'b', 'b'];

4
tests/Phpml/Clustering/DBSCANTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class DBSCANTest extends TestCase class DBSCANTest extends TestCase
{ {
public function testDBSCANSamplesClustering() public function testDBSCANSamplesClustering(): void
{ {
$samples = [[1, 1], [8, 7], [1, 2], [7, 8], [2, 1], [8, 9]]; $samples = [[1, 1], [8, 7], [1, 2], [7, 8], [2, 1], [8, 9]];
$clustered = [ $clustered = [
@ -32,7 +32,7 @@ class DBSCANTest extends TestCase
$this->assertEquals($clustered, $dbscan->cluster($samples)); $this->assertEquals($clustered, $dbscan->cluster($samples));
} }
public function testDBSCANSamplesClusteringAssociative() public function testDBSCANSamplesClusteringAssociative(): void
{ {
$samples = ['a' => [1, 1], 'b' => [9, 9], 'c' => [1, 2], 'd' => [9, 8], 'e' => [7, 7], 'f' => [8, 7]]; $samples = ['a' => [1, 1], 'b' => [9, 9], 'c' => [1, 2], 'd' => [9, 8], 'e' => [7, 7], 'f' => [8, 7]];
$clustered = [ $clustered = [

2
tests/Phpml/Clustering/FuzzyCMeansTest.php
View File

@ -25,7 +25,7 @@ class FuzzyCMeansTest extends TestCase
return $fcm; return $fcm;
} }
public function testMembershipMatrix() public function testMembershipMatrix(): void
{ {
$fcm = $this->testFCMSamplesClustering(); $fcm = $this->testFCMSamplesClustering();
$clusterCount = 2; $clusterCount = 2;

6
tests/Phpml/Clustering/KMeansTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class KMeansTest extends TestCase class KMeansTest extends TestCase
{ {
public function testKMeansSamplesClustering() public function testKMeansSamplesClustering(): void
{ {
$samples = [[1, 1], [8, 7], [1, 2], [7, 8], [2, 1], [8, 9]]; $samples = [[1, 1], [8, 7], [1, 2], [7, 8], [2, 1], [8, 9]];
@ -26,7 +26,7 @@ class KMeansTest extends TestCase
$this->assertCount(0, $samples); $this->assertCount(0, $samples);
} }
public function testKMeansInitializationMethods() public function testKMeansInitializationMethods(): void
{ {
$samples = [ $samples = [
[180, 155], [186, 159], [119, 185], [141, 147], [157, 158], [180, 155], [186, 159], [119, 185], [141, 147], [157, 158],
@ -53,7 +53,7 @@ class KMeansTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidClusterNumber() public function testThrowExceptionOnInvalidClusterNumber(): void
{ {
new KMeans(0); new KMeans(0);
} }

12
tests/Phpml/CrossValidation/RandomSplitTest.php
View File

@ -13,7 +13,7 @@ class RandomSplitTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnToSmallTestSize() public function testThrowExceptionOnToSmallTestSize(): void
{ {
new RandomSplit(new ArrayDataset([], []), 0); new RandomSplit(new ArrayDataset([], []), 0);
} }
@ -21,12 +21,12 @@ class RandomSplitTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnToBigTestSize() public function testThrowExceptionOnToBigTestSize(): void
{ {
new RandomSplit(new ArrayDataset([], []), 1); new RandomSplit(new ArrayDataset([], []), 1);
} }
public function testDatasetRandomSplitWithoutSeed() public function testDatasetRandomSplitWithoutSeed(): void
{ {
$dataset = new ArrayDataset( $dataset = new ArrayDataset(
$samples = [[1], [2], [3], [4]], $samples = [[1], [2], [3], [4]],
@ -44,7 +44,7 @@ class RandomSplitTest extends TestCase
$this->assertCount(3, $randomSplit2->getTrainSamples()); $this->assertCount(3, $randomSplit2->getTrainSamples());
} }
public function testDatasetRandomSplitWithSameSeed() public function testDatasetRandomSplitWithSameSeed(): void
{ {
$dataset = new ArrayDataset( $dataset = new ArrayDataset(
$samples = [[1], [2], [3], [4], [5], [6], [7], [8]], $samples = [[1], [2], [3], [4], [5], [6], [7], [8]],
@ -62,7 +62,7 @@ class RandomSplitTest extends TestCase
$this->assertEquals($randomSplit1->getTrainSamples(), $randomSplit2->getTrainSamples()); $this->assertEquals($randomSplit1->getTrainSamples(), $randomSplit2->getTrainSamples());
} }
public function testDatasetRandomSplitWithDifferentSeed() public function testDatasetRandomSplitWithDifferentSeed(): void
{ {
$dataset = new ArrayDataset( $dataset = new ArrayDataset(
$samples = [[1], [2], [3], [4], [5], [6], [7], [8]], $samples = [[1], [2], [3], [4], [5], [6], [7], [8]],
@ -78,7 +78,7 @@ class RandomSplitTest extends TestCase
$this->assertNotEquals($randomSplit1->getTrainSamples(), $randomSplit2->getTrainSamples()); $this->assertNotEquals($randomSplit1->getTrainSamples(), $randomSplit2->getTrainSamples());
} }
public function testRandomSplitCorrectSampleAndLabelPosition() public function testRandomSplitCorrectSampleAndLabelPosition(): void
{ {
$dataset = new ArrayDataset( $dataset = new ArrayDataset(
$samples = [[1], [2], [3], [4]], $samples = [[1], [2], [3], [4]],

4
tests/Phpml/CrossValidation/StratifiedRandomSplitTest.php
View File

@ -10,7 +10,7 @@ use PHPUnit\Framework\TestCase;
class StratifiedRandomSplitTest extends TestCase class StratifiedRandomSplitTest extends TestCase
{ {
public function testDatasetStratifiedRandomSplitWithEvenDistribution() public function testDatasetStratifiedRandomSplitWithEvenDistribution(): void
{ {
$dataset = new ArrayDataset( $dataset = new ArrayDataset(
$samples = [[1], [2], [3], [4], [5], [6], [7], [8]], $samples = [[1], [2], [3], [4], [5], [6], [7], [8]],
@ -28,7 +28,7 @@ class StratifiedRandomSplitTest extends TestCase
$this->assertEquals(1, $this->countSamplesByTarget($split->getTestLabels(), 'b')); $this->assertEquals(1, $this->countSamplesByTarget($split->getTestLabels(), 'b'));
} }
public function testDatasetStratifiedRandomSplitWithEvenDistributionAndNumericTargets() public function testDatasetStratifiedRandomSplitWithEvenDistributionAndNumericTargets(): void
{ {
$dataset = new ArrayDataset( $dataset = new ArrayDataset(
$samples = [[1], [2], [3], [4], [5], [6], [7], [8]], $samples = [[1], [2], [3], [4], [5], [6], [7], [8]],

4
tests/Phpml/Dataset/ArrayDatasetTest.php
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@ -12,12 +12,12 @@ class ArrayDatasetTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidArgumentsSize() public function testThrowExceptionOnInvalidArgumentsSize(): void
{ {
new ArrayDataset([0, 1], [0]); new ArrayDataset([0, 1], [0]);
} }
public function testArrayDataset() public function testArrayDataset(): void
{ {
$dataset = new ArrayDataset( $dataset = new ArrayDataset(
$samples = [[1], [2], [3], [4]], $samples = [[1], [2], [3], [4]],

8
tests/Phpml/Dataset/CsvDatasetTest.php
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@ -12,12 +12,12 @@ class CsvDatasetTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\FileException * @expectedException \Phpml\Exception\FileException
*/ */
public function testThrowExceptionOnMissingFile() public function testThrowExceptionOnMissingFile(): void
{ {
new CsvDataset('missingFile', 3); new CsvDataset('missingFile', 3);
} }
public function testSampleCsvDatasetWithHeaderRow() public function testSampleCsvDatasetWithHeaderRow(): void
{ {
$filePath = dirname(__FILE__).'/Resources/dataset.csv'; $filePath = dirname(__FILE__).'/Resources/dataset.csv';
@ -27,7 +27,7 @@ class CsvDatasetTest extends TestCase
$this->assertCount(10, $dataset->getTargets()); $this->assertCount(10, $dataset->getTargets());
} }
public function testSampleCsvDatasetWithoutHeaderRow() public function testSampleCsvDatasetWithoutHeaderRow(): void
{ {
$filePath = dirname(__FILE__).'/Resources/dataset.csv'; $filePath = dirname(__FILE__).'/Resources/dataset.csv';
@ -37,7 +37,7 @@ class CsvDatasetTest extends TestCase
$this->assertCount(11, $dataset->getTargets()); $this->assertCount(11, $dataset->getTargets());
} }
public function testLongCsvDataset() public function testLongCsvDataset(): void
{ {
$filePath = dirname(__FILE__).'/Resources/longdataset.csv'; $filePath = dirname(__FILE__).'/Resources/longdataset.csv';

2
tests/Phpml/Dataset/Demo/GlassDatasetTest.php
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@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class GlassDatasetTest extends TestCase class GlassDatasetTest extends TestCase
{ {
public function testLoadingWineDataset() public function testLoadingWineDataset(): void
{ {
$glass = new GlassDataset(); $glass = new GlassDataset();

2
tests/Phpml/Dataset/Demo/IrisDatasetTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class IrisDatasetTest extends TestCase class IrisDatasetTest extends TestCase
{ {
public function testLoadingIrisDataset() public function testLoadingIrisDataset(): void
{ {
$iris = new IrisDataset(); $iris = new IrisDataset();

2
tests/Phpml/Dataset/Demo/WineDatasetTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class WineDatasetTest extends TestCase class WineDatasetTest extends TestCase
{ {
public function testLoadingWineDataset() public function testLoadingWineDataset(): void
{ {
$wine = new WineDataset(); $wine = new WineDataset();

4
tests/Phpml/Dataset/FilesDatasetTest.php
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@ -12,12 +12,12 @@ class FilesDatasetTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\DatasetException * @expectedException \Phpml\Exception\DatasetException
*/ */
public function testThrowExceptionOnMissingRootFolder() public function testThrowExceptionOnMissingRootFolder(): void
{ {
new FilesDataset('some/not/existed/path'); new FilesDataset('some/not/existed/path');
} }
public function testLoadFilesDatasetWithBBCData() public function testLoadFilesDatasetWithBBCData(): void
{ {
$rootPath = dirname(__FILE__).'/Resources/bbc'; $rootPath = dirname(__FILE__).'/Resources/bbc';

4
tests/Phpml/DimensionReduction/KernelPCATest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class KernelPCATest extends TestCase class KernelPCATest extends TestCase
{ {
public function testKernelPCA() public function testKernelPCA(): void
{ {
// Acceptable error // Acceptable error
$epsilon = 0.001; $epsilon = 0.001;
@ -37,7 +37,7 @@ class KernelPCATest extends TestCase
// Due to the fact that the sign of values can be flipped // Due to the fact that the sign of values can be flipped
// during the calculation of eigenValues, we have to compare // during the calculation of eigenValues, we have to compare
// absolute value of the values // absolute value of the values
array_map(function ($val1, $val2) use ($epsilon) { array_map(function ($val1, $val2) use ($epsilon): void {
$this->assertEquals(abs($val1), abs($val2), '', $epsilon); $this->assertEquals(abs($val1), abs($val2), '', $epsilon);
}, $transformed, $reducedData); }, $transformed, $reducedData);

4
tests/Phpml/DimensionReduction/LDATest.php
View File

@ -10,7 +10,7 @@ use PHPUnit\Framework\TestCase;
class LDATest extends TestCase class LDATest extends TestCase
{ {
public function testLDA() public function testLDA(): void
{ {
// Acceptable error // Acceptable error
$epsilon = 0.001; $epsilon = 0.001;
@ -43,7 +43,7 @@ class LDATest extends TestCase
$control = array_merge($control, array_slice($transformed, 0, 3)); $control = array_merge($control, array_slice($transformed, 0, 3));
$control = array_merge($control, array_slice($transformed, -3)); $control = array_merge($control, array_slice($transformed, -3));
$check = function ($row1, $row2) use ($epsilon) { $check = function ($row1, $row2) use ($epsilon): void {
// Due to the fact that the sign of values can be flipped // Due to the fact that the sign of values can be flipped
// during the calculation of eigenValues, we have to compare // during the calculation of eigenValues, we have to compare
// absolute value of the values // absolute value of the values

6
tests/Phpml/DimensionReduction/PCATest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class PCATest extends TestCase class PCATest extends TestCase
{ {
public function testPCA() public function testPCA(): void
{ {
// Acceptable error // Acceptable error
$epsilon = 0.001; $epsilon = 0.001;
@ -39,7 +39,7 @@ class PCATest extends TestCase
// Due to the fact that the sign of values can be flipped // Due to the fact that the sign of values can be flipped
// during the calculation of eigenValues, we have to compare // during the calculation of eigenValues, we have to compare
// absolute value of the values // absolute value of the values
array_map(function ($val1, $val2) use ($epsilon) { array_map(function ($val1, $val2) use ($epsilon): void {
$this->assertEquals(abs($val1), abs($val2), '', $epsilon); $this->assertEquals(abs($val1), abs($val2), '', $epsilon);
}, $transformed, $reducedData); }, $transformed, $reducedData);
@ -49,7 +49,7 @@ class PCATest extends TestCase
$newRow = [[$transformed[$i]]]; $newRow = [[$transformed[$i]]];
$newRow2 = $pca->transform($row); $newRow2 = $pca->transform($row);
array_map(function ($val1, $val2) use ($epsilon) { array_map(function ($val1, $val2) use ($epsilon): void {
$this->assertEquals(abs($val1), abs($val2), '', $epsilon); $this->assertEquals(abs($val1), abs($val2), '', $epsilon);
}, $newRow, $newRow2); }, $newRow, $newRow2);
} }

10
tests/Phpml/FeatureExtraction/StopWordsTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class StopWordsTest extends TestCase class StopWordsTest extends TestCase
{ {
public function testCustomStopWords() public function testCustomStopWords(): void
{ {
$stopWords = new StopWords(['lorem', 'ipsum', 'dolor']); $stopWords = new StopWords(['lorem', 'ipsum', 'dolor']);
@ -25,12 +25,12 @@ class StopWordsTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidLanguage() public function testThrowExceptionOnInvalidLanguage(): void
{ {
StopWords::factory('Lorem'); StopWords::factory('Lorem');
} }
public function testEnglishStopWords() public function testEnglishStopWords(): void
{ {
$stopWords = StopWords::factory('English'); $stopWords = StopWords::factory('English');
@ -38,7 +38,7 @@ class StopWordsTest extends TestCase
$this->assertFalse($stopWords->isStopWord('strategy')); $this->assertFalse($stopWords->isStopWord('strategy'));
} }
public function testPolishStopWords() public function testPolishStopWords(): void
{ {
$stopWords = StopWords::factory('Polish'); $stopWords = StopWords::factory('Polish');
@ -46,7 +46,7 @@ class StopWordsTest extends TestCase
$this->assertFalse($stopWords->isStopWord('transhumanizm')); $this->assertFalse($stopWords->isStopWord('transhumanizm'));
} }
public function testFrenchStopWords() public function testFrenchStopWords(): void
{ {
$stopWords = StopWords::factory('French'); $stopWords = StopWords::factory('French');

2
tests/Phpml/FeatureExtraction/TfIdfTransformerTest.php
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@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class TfIdfTransformerTest extends TestCase class TfIdfTransformerTest extends TestCase
{ {
public function testTfIdfTransformation() public function testTfIdfTransformation(): void
{ {
// https://en.wikipedia.org/wiki/Tf-idf // https://en.wikipedia.org/wiki/Tf-idf

6
tests/Phpml/FeatureExtraction/TokenCountVectorizerTest.php
View File

@ -11,7 +11,7 @@ use PHPUnit\Framework\TestCase;
class TokenCountVectorizerTest extends TestCase class TokenCountVectorizerTest extends TestCase
{ {
public function testTransformationWithWhitespaceTokenizer() public function testTransformationWithWhitespaceTokenizer(): void
{ {
$samples = [ $samples = [
'Lorem ipsum dolor sit amet dolor', 'Lorem ipsum dolor sit amet dolor',
@ -47,7 +47,7 @@ class TokenCountVectorizerTest extends TestCase
$this->assertSame($tokensCounts, $samples); $this->assertSame($tokensCounts, $samples);
} }
public function testTransformationWithMinimumDocumentTokenCountFrequency() public function testTransformationWithMinimumDocumentTokenCountFrequency(): void
{ {
// word at least in half samples // word at least in half samples
$samples = [ $samples = [
@ -100,7 +100,7 @@ class TokenCountVectorizerTest extends TestCase
$this->assertSame($tokensCounts, $samples); $this->assertSame($tokensCounts, $samples);
} }
public function testTransformationWithStopWords() public function testTransformationWithStopWords(): void
{ {
$samples = [ $samples = [
'Lorem ipsum dolor sit amet dolor', 'Lorem ipsum dolor sit amet dolor',

4
tests/Phpml/Math/ComparisonTest.php
View File

@ -15,7 +15,7 @@ class ComparisonTest extends TestCase
* *
* @dataProvider provideData * @dataProvider provideData
*/ */
public function testResult($a, $b, string $operator, bool $expected) public function testResult($a, $b, string $operator, bool $expected): void
{ {
$result = Comparison::compare($a, $b, $operator); $result = Comparison::compare($a, $b, $operator);
@ -26,7 +26,7 @@ class ComparisonTest extends TestCase
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
* @expectedExceptionMessage Invalid operator "~=" provided * @expectedExceptionMessage Invalid operator "~=" provided
*/ */
public function testThrowExceptionWhenOperatorIsInvalid() public function testThrowExceptionWhenOperatorIsInvalid(): void
{ {
Comparison::compare(1, 1, '~='); Comparison::compare(1, 1, '~=');
} }

10
tests/Phpml/Math/Distance/ChebyshevTest.php
View File

@ -14,7 +14,7 @@ class ChebyshevTest extends TestCase
*/ */
private $distanceMetric; private $distanceMetric;
public function setUp() public function setUp(): void
{ {
$this->distanceMetric = new Chebyshev(); $this->distanceMetric = new Chebyshev();
} }
@ -22,7 +22,7 @@ class ChebyshevTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidArguments() public function testThrowExceptionOnInvalidArguments(): void
{ {
$a = [0, 1, 2]; $a = [0, 1, 2];
$b = [0, 2]; $b = [0, 2];
@ -30,7 +30,7 @@ class ChebyshevTest extends TestCase
$this->distanceMetric->distance($a, $b); $this->distanceMetric->distance($a, $b);
} }
public function testCalculateDistanceForOneDimension() public function testCalculateDistanceForOneDimension(): void
{ {
$a = [4]; $a = [4];
$b = [2]; $b = [2];
@ -41,7 +41,7 @@ class ChebyshevTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance); $this->assertEquals($expectedDistance, $actualDistance);
} }
public function testCalculateDistanceForTwoDimensions() public function testCalculateDistanceForTwoDimensions(): void
{ {
$a = [4, 6]; $a = [4, 6];
$b = [2, 5]; $b = [2, 5];
@ -52,7 +52,7 @@ class ChebyshevTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance); $this->assertEquals($expectedDistance, $actualDistance);
} }
public function testCalculateDistanceForThreeDimensions() public function testCalculateDistanceForThreeDimensions(): void
{ {
$a = [6, 10, 3]; $a = [6, 10, 3];
$b = [2, 5, 5]; $b = [2, 5, 5];

10
tests/Phpml/Math/Distance/EuclideanTest.php
View File

@ -14,7 +14,7 @@ class EuclideanTest extends TestCase
*/ */
private $distanceMetric; private $distanceMetric;
public function setUp() public function setUp(): void
{ {
$this->distanceMetric = new Euclidean(); $this->distanceMetric = new Euclidean();
} }
@ -22,7 +22,7 @@ class EuclideanTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidArguments() public function testThrowExceptionOnInvalidArguments(): void
{ {
$a = [0, 1, 2]; $a = [0, 1, 2];
$b = [0, 2]; $b = [0, 2];
@ -30,7 +30,7 @@ class EuclideanTest extends TestCase
$this->distanceMetric->distance($a, $b); $this->distanceMetric->distance($a, $b);
} }
public function testCalculateDistanceForOneDimension() public function testCalculateDistanceForOneDimension(): void
{ {
$a = [4]; $a = [4];
$b = [2]; $b = [2];
@ -41,7 +41,7 @@ class EuclideanTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance); $this->assertEquals($expectedDistance, $actualDistance);
} }
public function testCalculateDistanceForTwoDimensions() public function testCalculateDistanceForTwoDimensions(): void
{ {
$a = [4, 6]; $a = [4, 6];
$b = [2, 5]; $b = [2, 5];
@ -52,7 +52,7 @@ class EuclideanTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance); $this->assertEquals($expectedDistance, $actualDistance);
} }
public function testCalculateDistanceForThreeDimensions() public function testCalculateDistanceForThreeDimensions(): void
{ {
$a = [6, 10, 3]; $a = [6, 10, 3];
$b = [2, 5, 5]; $b = [2, 5, 5];

10
tests/Phpml/Math/Distance/ManhattanTest.php
View File

@ -14,7 +14,7 @@ class ManhattanTest extends TestCase
*/ */
private $distanceMetric; private $distanceMetric;
public function setUp() public function setUp(): void
{ {
$this->distanceMetric = new Manhattan(); $this->distanceMetric = new Manhattan();
} }
@ -22,7 +22,7 @@ class ManhattanTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidArguments() public function testThrowExceptionOnInvalidArguments(): void
{ {
$a = [0, 1, 2]; $a = [0, 1, 2];
$b = [0, 2]; $b = [0, 2];
@ -30,7 +30,7 @@ class ManhattanTest extends TestCase
$this->distanceMetric->distance($a, $b); $this->distanceMetric->distance($a, $b);
} }
public function testCalculateDistanceForOneDimension() public function testCalculateDistanceForOneDimension(): void
{ {
$a = [4]; $a = [4];
$b = [2]; $b = [2];
@ -41,7 +41,7 @@ class ManhattanTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance); $this->assertEquals($expectedDistance, $actualDistance);
} }
public function testCalculateDistanceForTwoDimensions() public function testCalculateDistanceForTwoDimensions(): void
{ {
$a = [4, 6]; $a = [4, 6];
$b = [2, 5]; $b = [2, 5];
@ -52,7 +52,7 @@ class ManhattanTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance); $this->assertEquals($expectedDistance, $actualDistance);
} }
public function testCalculateDistanceForThreeDimensions() public function testCalculateDistanceForThreeDimensions(): void
{ {
$a = [6, 10, 3]; $a = [6, 10, 3];
$b = [2, 5, 5]; $b = [2, 5, 5];

12
tests/Phpml/Math/Distance/MinkowskiTest.php
View File

@ -14,7 +14,7 @@ class MinkowskiTest extends TestCase
*/ */
private $distanceMetric; private $distanceMetric;
public function setUp() public function setUp(): void
{ {
$this->distanceMetric = new Minkowski(); $this->distanceMetric = new Minkowski();
} }
@ -22,7 +22,7 @@ class MinkowskiTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidArguments() public function testThrowExceptionOnInvalidArguments(): void
{ {
$a = [0, 1, 2]; $a = [0, 1, 2];
$b = [0, 2]; $b = [0, 2];
@ -30,7 +30,7 @@ class MinkowskiTest extends TestCase
$this->distanceMetric->distance($a, $b); $this->distanceMetric->distance($a, $b);
} }
public function testCalculateDistanceForOneDimension() public function testCalculateDistanceForOneDimension(): void
{ {
$a = [4]; $a = [4];
$b = [2]; $b = [2];
@ -41,7 +41,7 @@ class MinkowskiTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance); $this->assertEquals($expectedDistance, $actualDistance);
} }
public function testCalculateDistanceForTwoDimensions() public function testCalculateDistanceForTwoDimensions(): void
{ {
$a = [4, 6]; $a = [4, 6];
$b = [2, 5]; $b = [2, 5];
@ -52,7 +52,7 @@ class MinkowskiTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance, '', $delta = 0.001); $this->assertEquals($expectedDistance, $actualDistance, '', $delta = 0.001);
} }
public function testCalculateDistanceForThreeDimensions() public function testCalculateDistanceForThreeDimensions(): void
{ {
$a = [6, 10, 3]; $a = [6, 10, 3];
$b = [2, 5, 5]; $b = [2, 5, 5];
@ -63,7 +63,7 @@ class MinkowskiTest extends TestCase
$this->assertEquals($expectedDistance, $actualDistance, '', $delta = 0.001); $this->assertEquals($expectedDistance, $actualDistance, '', $delta = 0.001);
} }
public function testCalculateDistanceForThreeDimensionsWithDifferentLambda() public function testCalculateDistanceForThreeDimensionsWithDifferentLambda(): void
{ {
$distanceMetric = new Minkowski($lambda = 5); $distanceMetric = new Minkowski($lambda = 5);

2
tests/Phpml/Math/Kernel/RBFTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class RBFTest extends TestCase class RBFTest extends TestCase
{ {
public function testComputeRBFKernelFunction() public function testComputeRBFKernelFunction(): void
{ {
$rbf = new RBF($gamma = 0.001); $rbf = new RBF($gamma = 0.001);

2
tests/Phpml/Math/LinearAlgebra/EigenDecompositionTest.php
View File

@ -10,7 +10,7 @@ use PHPUnit\Framework\TestCase;
class EigenDecompositionTest extends TestCase class EigenDecompositionTest extends TestCase
{ {
public function testSymmetricMatrixEigenPairs() public function testSymmetricMatrixEigenPairs(): void
{ {
// Acceptable error // Acceptable error
$epsilon = 0.001; $epsilon = 0.001;

38
tests/Phpml/Math/MatrixTest.php
View File

@ -12,12 +12,12 @@ class MatrixTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidMatrixSupplied() public function testThrowExceptionOnInvalidMatrixSupplied(): void
{ {
new Matrix([[1, 2], [3]]); new Matrix([[1, 2], [3]]);
} }
public function testCreateMatrixFromFlatArray() public function testCreateMatrixFromFlatArray(): void
{ {
$flatArray = [1, 2, 3, 4]; $flatArray = [1, 2, 3, 4];
$matrix = Matrix::fromFlatArray($flatArray); $matrix = Matrix::fromFlatArray($flatArray);
@ -32,7 +32,7 @@ class MatrixTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\MatrixException * @expectedException \Phpml\Exception\MatrixException
*/ */
public function testThrowExceptionOnInvalidColumnNumber() public function testThrowExceptionOnInvalidColumnNumber(): void
{ {
$matrix = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix->getColumnValues(4); $matrix->getColumnValues(4);
@ -41,13 +41,13 @@ class MatrixTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\MatrixException * @expectedException \Phpml\Exception\MatrixException
*/ */
public function testThrowExceptionOnGetDeterminantIfArrayIsNotSquare() public function testThrowExceptionOnGetDeterminantIfArrayIsNotSquare(): void
{ {
$matrix = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix->getDeterminant(); $matrix->getDeterminant();
} }
public function testGetMatrixDeterminant() public function testGetMatrixDeterminant(): void
{ {
//http://matrix.reshish.com/determinant.php //http://matrix.reshish.com/determinant.php
$matrix = new Matrix([ $matrix = new Matrix([
@ -68,7 +68,7 @@ class MatrixTest extends TestCase
$this->assertEquals(1116.5035, $matrix->getDeterminant(), '', $delta = 0.0001); $this->assertEquals(1116.5035, $matrix->getDeterminant(), '', $delta = 0.0001);
} }
public function testMatrixTranspose() public function testMatrixTranspose(): void
{ {
$matrix = new Matrix([ $matrix = new Matrix([
[3, 3, 3], [3, 3, 3],
@ -88,7 +88,7 @@ class MatrixTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnMultiplyWhenInconsistentMatrixSupplied() public function testThrowExceptionOnMultiplyWhenInconsistentMatrixSupplied(): void
{ {
$matrix1 = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix1 = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix2 = new Matrix([[3, 2, 1], [6, 5, 4]]); $matrix2 = new Matrix([[3, 2, 1], [6, 5, 4]]);
@ -96,7 +96,7 @@ class MatrixTest extends TestCase
$matrix1->multiply($matrix2); $matrix1->multiply($matrix2);
} }
public function testMatrixMultiplyByMatrix() public function testMatrixMultiplyByMatrix(): void
{ {
$matrix1 = new Matrix([ $matrix1 = new Matrix([
[1, 2, 3], [1, 2, 3],
@ -117,7 +117,7 @@ class MatrixTest extends TestCase
$this->assertEquals($product, $matrix1->multiply($matrix2)->toArray()); $this->assertEquals($product, $matrix1->multiply($matrix2)->toArray());
} }
public function testDivideByScalar() public function testDivideByScalar(): void
{ {
$matrix = new Matrix([ $matrix = new Matrix([
[4, 6, 8], [4, 6, 8],
@ -135,7 +135,7 @@ class MatrixTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\MatrixException * @expectedException \Phpml\Exception\MatrixException
*/ */
public function testThrowExceptionWhenInverseIfArrayIsNotSquare() public function testThrowExceptionWhenInverseIfArrayIsNotSquare(): void
{ {
$matrix = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix = new Matrix([[1, 2, 3], [4, 5, 6]]);
$matrix->inverse(); $matrix->inverse();
@ -144,7 +144,7 @@ class MatrixTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\MatrixException * @expectedException \Phpml\Exception\MatrixException
*/ */
public function testThrowExceptionWhenInverseIfMatrixIsSingular() public function testThrowExceptionWhenInverseIfMatrixIsSingular(): void
{ {
$matrix = new Matrix([ $matrix = new Matrix([
[0, 0, 0], [0, 0, 0],
@ -155,7 +155,7 @@ class MatrixTest extends TestCase
$matrix->inverse(); $matrix->inverse();
} }
public function testInverseMatrix() public function testInverseMatrix(): void
{ {
//http://ncalculators.com/matrix/inverse-matrix.htm //http://ncalculators.com/matrix/inverse-matrix.htm
$matrix = new Matrix([ $matrix = new Matrix([
@ -173,7 +173,7 @@ class MatrixTest extends TestCase
$this->assertEquals($inverseMatrix, $matrix->inverse()->toArray(), '', $delta = 0.0001); $this->assertEquals($inverseMatrix, $matrix->inverse()->toArray(), '', $delta = 0.0001);
} }
public function testCrossOutMatrix() public function testCrossOutMatrix(): void
{ {
$matrix = new Matrix([ $matrix = new Matrix([
[3, 4, 2], [3, 4, 2],
@ -189,14 +189,14 @@ class MatrixTest extends TestCase
$this->assertEquals($crossOuted, $matrix->crossOut(1, 1)->toArray()); $this->assertEquals($crossOuted, $matrix->crossOut(1, 1)->toArray());
} }
public function testToScalar() public function testToScalar(): void
{ {
$matrix = new Matrix([[1, 2, 3], [3, 2, 3]]); $matrix = new Matrix([[1, 2, 3], [3, 2, 3]]);
$this->assertEquals($matrix->toScalar(), 1); $this->assertEquals($matrix->toScalar(), 1);
} }
public function testMultiplyByScalar() public function testMultiplyByScalar(): void
{ {
$matrix = new Matrix([ $matrix = new Matrix([
[4, 6, 8], [4, 6, 8],
@ -211,7 +211,7 @@ class MatrixTest extends TestCase
$this->assertEquals($result, $matrix->multiplyByScalar(-2)->toArray()); $this->assertEquals($result, $matrix->multiplyByScalar(-2)->toArray());
} }
public function testAdd() public function testAdd(): void
{ {
$array1 = [1, 1, 1]; $array1 = [1, 1, 1];
$array2 = [2, 2, 2]; $array2 = [2, 2, 2];
@ -223,7 +223,7 @@ class MatrixTest extends TestCase
$this->assertEquals($result, $m1->add($m2)->toArray()[0]); $this->assertEquals($result, $m1->add($m2)->toArray()[0]);
} }
public function testSubtract() public function testSubtract(): void
{ {
$array1 = [1, 1, 1]; $array1 = [1, 1, 1];
$array2 = [2, 2, 2]; $array2 = [2, 2, 2];
@ -235,7 +235,7 @@ class MatrixTest extends TestCase
$this->assertEquals($result, $m1->subtract($m2)->toArray()[0]); $this->assertEquals($result, $m1->subtract($m2)->toArray()[0]);
} }
public function testTransposeArray() public function testTransposeArray(): void
{ {
$array = [ $array = [
[1, 1, 1], [1, 1, 1],
@ -250,7 +250,7 @@ class MatrixTest extends TestCase
$this->assertEquals($transposed, Matrix::transposeArray($array)); $this->assertEquals($transposed, Matrix::transposeArray($array));
} }
public function testDot() public function testDot(): void
{ {
$vect1 = [2, 2, 2]; $vect1 = [2, 2, 2];
$vect2 = [3, 3, 3]; $vect2 = [3, 3, 3];

2
tests/Phpml/Math/ProductTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class ProductTest extends TestCase class ProductTest extends TestCase
{ {
public function testScalarProduct() public function testScalarProduct(): void
{ {
$this->assertEquals(10, Product::scalar([2, 3], [-1, 4])); $this->assertEquals(10, Product::scalar([2, 3], [-1, 4]));
$this->assertEquals(-0.1, Product::scalar([1, 4, 1], [-2, 0.5, -0.1])); $this->assertEquals(-0.1, Product::scalar([1, 4, 1], [-2, 0.5, -0.1]));

20
tests/Phpml/Math/SetTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class SetTest extends TestCase class SetTest extends TestCase
{ {
public function testUnion() public function testUnion(): void
{ {
$union = Set::union(new Set([3, 1]), new Set([3, 2, 2])); $union = Set::union(new Set([3, 1]), new Set([3, 2, 2]));
@ -18,7 +18,7 @@ class SetTest extends TestCase
$this->assertEquals(3, $union->cardinality()); $this->assertEquals(3, $union->cardinality());
} }
public function testIntersection() public function testIntersection(): void
{ {
$intersection = Set::intersection(new Set(['C', 'A']), new Set(['B', 'C'])); $intersection = Set::intersection(new Set(['C', 'A']), new Set(['B', 'C']));
@ -27,7 +27,7 @@ class SetTest extends TestCase
$this->assertEquals(1, $intersection->cardinality()); $this->assertEquals(1, $intersection->cardinality());
} }
public function testDifference() public function testDifference(): void
{ {
$difference = Set::difference(new Set(['C', 'A', 'B']), new Set(['A'])); $difference = Set::difference(new Set(['C', 'A', 'B']), new Set(['A']));
@ -36,7 +36,7 @@ class SetTest extends TestCase
$this->assertEquals(2, $difference->cardinality()); $this->assertEquals(2, $difference->cardinality());
} }
public function testPower() public function testPower(): void
{ {
$power = Set::power(new Set(['A', 'B'])); $power = Set::power(new Set(['A', 'B']));
@ -45,7 +45,7 @@ class SetTest extends TestCase
$this->assertCount(4, $power); $this->assertCount(4, $power);
} }
public function testCartesian() public function testCartesian(): void
{ {
$cartesian = Set::cartesian(new Set(['A']), new Set([1, 2])); $cartesian = Set::cartesian(new Set(['A']), new Set([1, 2]));
@ -54,7 +54,7 @@ class SetTest extends TestCase
$this->assertCount(2, $cartesian); $this->assertCount(2, $cartesian);
} }
public function testContains() public function testContains(): void
{ {
$set = new Set(['B', 'A', 2, 1]); $set = new Set(['B', 'A', 2, 1]);
@ -65,21 +65,21 @@ class SetTest extends TestCase
$this->assertFalse($set->containsAll(['A', 'B', 'C'])); $this->assertFalse($set->containsAll(['A', 'B', 'C']));
} }
public function testRemove() public function testRemove(): void
{ {
$set = new Set(['B', 'A', 2, 1]); $set = new Set(['B', 'A', 2, 1]);
$this->assertEquals((new Set([1, 2, 2, 2, 'B']))->toArray(), $set->remove('A')->toArray()); $this->assertEquals((new Set([1, 2, 2, 2, 'B']))->toArray(), $set->remove('A')->toArray());
} }
public function testAdd() public function testAdd(): void
{ {
$set = new Set(['B', 'A', 2, 1]); $set = new Set(['B', 'A', 2, 1]);
$set->addAll(['foo', 'bar']); $set->addAll(['foo', 'bar']);
$this->assertEquals(6, $set->cardinality()); $this->assertEquals(6, $set->cardinality());
} }
public function testEmpty() public function testEmpty(): void
{ {
$set = new Set([1, 2]); $set = new Set([1, 2]);
$set->removeAll([2, 1]); $set->removeAll([2, 1]);
@ -87,7 +87,7 @@ class SetTest extends TestCase
$this->assertTrue($set->isEmpty()); $this->assertTrue($set->isEmpty());
} }
public function testToArray() public function testToArray(): void
{ {
$set = new Set([1, 2, 2, 3, 'A', false, '', 1.1, -1, -10, 'B']); $set = new Set([1, 2, 2, 3, 'A', false, '', 1.1, -1, -10, 'B']);

4
tests/Phpml/Math/Statistic/CorrelationTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class CorrelationTest extends TestCase class CorrelationTest extends TestCase
{ {
public function testPearsonCorrelation() public function testPearsonCorrelation(): void
{ {
//http://www.stat.wmich.edu/s216/book/node126.html //http://www.stat.wmich.edu/s216/book/node126.html
$delta = 0.001; $delta = 0.001;
@ -32,7 +32,7 @@ class CorrelationTest extends TestCase
/** /**
* @expectedException \Phpml\Exception\InvalidArgumentException * @expectedException \Phpml\Exception\InvalidArgumentException
*/ */
public function testThrowExceptionOnInvalidArgumentsForPearsonCorrelation() public function testThrowExceptionOnInvalidArgumentsForPearsonCorrelation(): void
{ {
Correlation::pearson([1, 2, 4], [3, 5]); Correlation::pearson([1, 2, 4], [3, 5]);
} }

2
tests/Phpml/Math/Statistic/CovarianceTest.php
View File

@ -10,7 +10,7 @@ use PHPUnit\Framework\TestCase;
class CovarianceTest extends TestCase class CovarianceTest extends TestCase
{ {
public function testSimpleCovariance() public function testSimpleCovariance(): void
{ {
// Acceptable error // Acceptable error
$epsilon = 0.001; $epsilon = 0.001;

2
tests/Phpml/Math/Statistic/GaussianTest.php
View File

@ -9,7 +9,7 @@ use PHPUnit\Framework\TestCase;
class GaussianTest extends TestCase class GaussianTest extends TestCase
{ {
public function testPdf() public function testPdf(): void
{ {
$std = 1.0; $std = 1.0;
$mean = 0.0; $mean = 0.0;

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