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Apache

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Linux 5.14.0-427.33.1.el9_4.x86_64

PHP Version:

7.4.33

User:

infinio

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/home/infinio/public_html/moodle/lib/mlbackend/php/phpml/src/Phpml/Clustering

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✏️ Editing: KMeans.php

<?php

declare(strict_types=1);

namespace Phpml\Clustering;

use Phpml\Clustering\KMeans\Space;
use Phpml\Exception\InvalidArgumentException;

class KMeans implements Clusterer
{
    public const INIT_RANDOM = 1;

public const INIT_KMEANS_PLUS_PLUS = 2;

/**
     * @var int
     */
    private $clustersNumber;

/**
     * @var int
     */
    private $initialization;

public function __construct(int $clustersNumber, int $initialization = self::INIT_KMEANS_PLUS_PLUS)
    {
        if ($clustersNumber <= 0) {
            throw new InvalidArgumentException('Invalid clusters number');
        }

$this->clustersNumber = $clustersNumber;
        $this->initialization = $initialization;
    }

public function cluster(array $samples): array
    {
        $space = new Space(count(reset($samples)));
        foreach ($samples as $key => $sample) {
            $space->addPoint($sample, $key);
        }

$clusters = [];
        foreach ($space->cluster($this->clustersNumber, $this->initialization) as $cluster) {
            $clusters[] = $cluster->getPoints();
        }

return $clusters;
    }
}

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