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cs-fixer

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This commit is contained in:
Arkadiusz Kondas 2016-05-01 00:56:43 +02:00
parent 26be771668
commit 01a2499754
3 changed files with 25 additions and 25 deletions
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5
src/Phpml/Clustering/Clusterer.php
View File

@ -1,16 +1,15 @@
<?php <?php
declare(strict_types = 1);
declare (strict_types = 1);
namespace Phpml\Clustering; namespace Phpml\Clustering;
interface Clusterer interface Clusterer
{ {
/** /**
* @param array $samples * @param array $samples
* *
* @return array * @return array
*/ */
public function cluster(array $samples); public function cluster(array $samples);
} }

30
src/Phpml/Clustering/DBSCAN.php
View File

@ -1,5 +1,6 @@
<?php <?php
declare(strict_types = 1);
declare (strict_types = 1);
namespace Phpml\Clustering; namespace Phpml\Clustering;
@ -24,8 +25,8 @@ class DBSCAN implements Clusterer
private $distanceMetric; private $distanceMetric;
/** /**
* @param float $epsilon * @param float $epsilon
* @param int $minSamples * @param int $minSamples
* @param Distance $distanceMetric * @param Distance $distanceMetric
*/ */
public function __construct($epsilon = 0.5, $minSamples = 3, Distance $distanceMetric = null) public function __construct($epsilon = 0.5, $minSamples = 3, Distance $distanceMetric = null)
@ -49,14 +50,14 @@ class DBSCAN implements Clusterer
$clusters = []; $clusters = [];
$visited = []; $visited = [];
foreach($samples as $index => $sample) { foreach ($samples as $index => $sample) {
if(isset($visited[$index])) { if (isset($visited[$index])) {
continue; continue;
} }
$visited[$index] = true; $visited[$index] = true;
$regionSamples = $this->getSamplesInRegion($sample, $samples); $regionSamples = $this->getSamplesInRegion($sample, $samples);
if(count($regionSamples) >= $this->minSamples) { if (count($regionSamples) >= $this->minSamples) {
$clusters[] = $this->expandCluster($regionSamples, $visited); $clusters[] = $this->expandCluster($regionSamples, $visited);
} }
} }
@ -70,11 +71,12 @@ class DBSCAN implements Clusterer
* *
* @return array * @return array
*/ */
private function getSamplesInRegion($localSample, $samples) { private function getSamplesInRegion($localSample, $samples)
{
$region = []; $region = [];
foreach($samples as $index => $sample) { foreach ($samples as $index => $sample) {
if($this->distanceMetric->distance($localSample, $sample) < $this->epsilon) { if ($this->distanceMetric->distance($localSample, $sample) < $this->epsilon) {
$region[$index] = $sample; $region[$index] = $sample;
} }
} }
@ -88,14 +90,15 @@ class DBSCAN implements Clusterer
* *
* @return array * @return array
*/ */
private function expandCluster($samples, &$visited) { private function expandCluster($samples, &$visited)
{
$cluster = []; $cluster = [];
foreach($samples as $index => $sample) { foreach ($samples as $index => $sample) {
if(!isset($visited[$index])) { if (!isset($visited[$index])) {
$visited[$index] = true; $visited[$index] = true;
$regionSamples = $this->getSamplesInRegion($sample, $samples); $regionSamples = $this->getSamplesInRegion($sample, $samples);
if(count($regionSamples) > $this->minSamples) { if (count($regionSamples) > $this->minSamples) {
$cluster = array_merge($regionSamples, $cluster); $cluster = array_merge($regionSamples, $cluster);
} }
} }
@ -105,5 +108,4 @@ class DBSCAN implements Clusterer
return $cluster; return $cluster;
} }
} }

15
tests/Phpml/Clustering/DBSCANTest.php
View File

@ -1,5 +1,6 @@
<?php <?php
declare(strict_types = 1);
declare (strict_types = 1);
namespace tests\Clustering; namespace tests\Clustering;
@ -7,14 +8,13 @@ use Phpml\Clustering\DBSCAN;
class DBSCANTest extends \PHPUnit_Framework_TestCase class DBSCANTest extends \PHPUnit_Framework_TestCase
{ {
public function testDBSCANSamplesClustering() public function testDBSCANSamplesClustering()
{ {
$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 = [
[[1, 1], [1, 2], [2, 1]], [[1, 1], [1, 2], [2, 1]],
[[8, 7], [7, 8], [8, 9]] [[8, 7], [7, 8], [8, 9]],
]; ];
$dbscan = new DBSCAN($epsilon = 2, $minSamples = 3); $dbscan = new DBSCAN($epsilon = 2, $minSamples = 3);
@ -24,16 +24,15 @@ class DBSCANTest extends \PHPUnit_Framework_TestCase
public function testDBSCANSamplesInCircleClustering() public function testDBSCANSamplesInCircleClustering()
{ {
$samples = [[1, 1],[6, 6],[1, -1],[5, 6],[-1, -1],[7, 8],[-1, 1],[7, 7]]; $samples = [[1, 1], [6, 6], [1, -1], [5, 6], [-1, -1], [7, 8], [-1, 1], [7, 7]];
$clustered = [ $clustered = [
[[1, 1],[1, -1],[-1, -1],[-1, 1]], [[1, 1], [1, -1], [-1, -1], [-1, 1]],
[[6, 6],[5, 6],[7, 8],[7, 7]] [[6, 6], [5, 6], [7, 8], [7, 7]],
]; ];
$dbscan = new DBSCAN($epsilon = 3, $minSamples = 4); $dbscan = new DBSCAN($epsilon = 3, $minSamples = 4);
$this->assertEquals($clustered, $dbscan->cluster($samples)); $this->assertEquals($clustered, $dbscan->cluster($samples));
} }
} }