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<?php
declare(strict_types=1);
namespace Phpml\CrossValidation;
use Phpml\Dataset\Dataset;
use Phpml\Exception\InvalidArgumentException;
abstract class Split
{
/**
* @var array
*/
protected $trainSamples = [];
protected $testSamples = [];
protected $trainLabels = [];
protected $testLabels = [];
public function __construct(Dataset $dataset, float $testSize = 0.3, ?int $seed = null)
if ($testSize <= 0 || $testSize >= 1) {
throw new InvalidArgumentException('testsize must be between 0.0 and 1.0');
}
$this->seedGenerator($seed);
$this->splitDataset($dataset, $testSize);
public function getTrainSamples(): array
return $this->trainSamples;
public function getTestSamples(): array
return $this->testSamples;
public function getTrainLabels(): array
return $this->trainLabels;
public function getTestLabels(): array
return $this->testLabels;
abstract protected function splitDataset(Dataset $dataset, float $testSize): void;
protected function seedGenerator(?int $seed = null): void
if ($seed === null) {
mt_srand();
} else {
mt_srand($seed);