KMeans::cluster() - Code Metrics - Inspection of "test kmeans init methods" - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

Completed

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by Arkadiusz

created 2016-05-01 21:44 UTC

KMeans::cluster() A

↳ Parent: KMeans

Complexity

Conditions	3
Paths	4

Size

Total Lines	14
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
c	2
b	0
f	0
dl	0
loc	14
rs	9.4285
cc	3
eloc	8
nc	4
nop	1

<?php

declare (strict_types = 1);

namespace Phpml\Clustering;

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

class KMeans implements Clusterer
{
    const INIT_RANDOM = 1;
    const INIT_KMEANS_PLUS_PLUS = 2;

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

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

    /**
     * @param int $clustersNumber
     * @param int $initialization
     *
     * @throws InvalidArgumentException
     */
    public function __construct(int $clustersNumber, int $initialization = self::INIT_KMEANS_PLUS_PLUS)
    {
        if ($clustersNumber <= 0) {
            throw InvalidArgumentException::invalidClustersNumber();
        }

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

    /**
     * @param array $samples
     *
     * @return array
     */
    public function cluster(array $samples)
    {
        $space = new Space(count($samples[0]));
        foreach ($samples as $sample) {
            $space->addPoint($sample);
        }

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

        return $clusters;
    }
}


1			<?php
2
3			declare (strict_types = 1);
4
5			namespace Phpml\Clustering;
6
7			use Phpml\Clustering\KMeans\Space;
8			use Phpml\Exception\InvalidArgumentException;
9
10			class KMeans implements Clusterer
11			{
12			const INIT_RANDOM = 1;
13			const INIT_KMEANS_PLUS_PLUS = 2;
14
15			/**
16			* @var int
17			*/
18			private $clustersNumber;
19
20			/**
21			* @var int
22			*/
23			private $initialization;
24
25			/**
26			* @param int $clustersNumber
27			* @param int $initialization
28			*
29			* @throws InvalidArgumentException
30			*/
31			public function __construct(int $clustersNumber, int $initialization = self::INIT_KMEANS_PLUS_PLUS)
32			{
33			if ($clustersNumber <= 0) {
34			throw InvalidArgumentException::invalidClustersNumber();
35			}
36
37			$this->clustersNumber = $clustersNumber;
38			$this->initialization = $initialization;
39			}
40
41			/**
42			* @param array $samples
43			*
44			* @return array
45			*/
46			public function cluster(array $samples)
47			{
48			$space = new Space(count($samples[0]));
49			foreach ($samples as $sample) {
50			$space->addPoint($sample);
51			}
52
53			$clusters = [];
54			foreach ($space->solve($this->clustersNumber, $this->initialization) as $cluster) {
55			$clusters[] = $cluster->getPoints();
56			}
57
58			return $clusters;
59			}
60			}
61

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KMeans::cluster() A

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