95 lines
1.7 KiB
PHP
95 lines
1.7 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\CrossValidation;
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use Phpml\Dataset\Dataset;
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use Phpml\Exception\InvalidArgumentException;
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abstract class Split
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{
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/**
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* @var array
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*/
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protected $trainSamples = [];
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/**
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* @var array
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*/
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protected $testSamples = [];
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/**
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* @var array
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*/
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protected $trainLabels = [];
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/**
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* @var array
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*/
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protected $testLabels = [];
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/**
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* @param Dataset $dataset
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* @param float $testSize
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* @param int $seed
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*
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* @throws InvalidArgumentException
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*/
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public function __construct(Dataset $dataset, float $testSize = 0.3, int $seed = null)
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{
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if (0 >= $testSize || 1 <= $testSize) {
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throw InvalidArgumentException::percentNotInRange('testSize');
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}
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$this->seedGenerator($seed);
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$this->splitDataset($dataset, $testSize);
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}
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abstract protected function splitDataset(Dataset $dataset, float $testSize);
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/**
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* @return array
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*/
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public function getTrainSamples()
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{
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return $this->trainSamples;
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}
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/**
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* @return array
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*/
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public function getTestSamples()
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{
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return $this->testSamples;
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}
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/**
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* @return array
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*/
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public function getTrainLabels()
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{
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return $this->trainLabels;
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}
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/**
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* @return array
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*/
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public function getTestLabels()
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{
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return $this->testLabels;
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}
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/**
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* @param int|null $seed
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*/
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protected function seedGenerator(int $seed = null)
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{
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if (null === $seed) {
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mt_srand();
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} else {
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mt_srand($seed);
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}
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}
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}
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