StratifiedRandomSplit::splitByTarget() - Code Metrics - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

StratifiedRandomSplit::splitByTarget() A
last analyzed 2020-05-15 05:48 UTC

↳ Parent: StratifiedRandomSplit

Complexity

Conditions	2
Paths	2

Size

Total Lines	14
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	7
dl	0
loc	14
rs	10
c	0
b	0
f	0
cc	2
nc	2
nop	1

<?php

declare(strict_types=1);

namespace Phpml\CrossValidation;

use Phpml\Dataset\ArrayDataset;
use Phpml\Dataset\Dataset;

class StratifiedRandomSplit extends RandomSplit
{
    protected function splitDataset(Dataset $dataset, float $testSize): void
    {
        $datasets = $this->splitByTarget($dataset);

        foreach ($datasets as $targetSet) {
            parent::splitDataset($targetSet, $testSize);
        }
    }

    /**
     * @return Dataset[]
     */
    private function splitByTarget(Dataset $dataset): array
    {
        $targets = $dataset->getTargets();
        $samples = $dataset->getSamples();

        $uniqueTargets = array_unique($targets);
        /** @var array $split */
        $split = array_combine($uniqueTargets, array_fill(0, count($uniqueTargets), []));

        foreach ($samples as $key => $sample) {
            $split[$targets[$key]][] = $sample;
        }

        return $this->createDatasets($uniqueTargets, $split);
    }

    private function createDatasets(array $uniqueTargets, array $split): array
    {
        $datasets = [];
        foreach ($uniqueTargets as $target) {
            $datasets[$target] = new ArrayDataset($split[$target], array_fill(0, count($split[$target]), $target));
        }

        return $datasets;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace Phpml\CrossValidation;
6
7			use Phpml\Dataset\ArrayDataset;
8			use Phpml\Dataset\Dataset;
9
10			class StratifiedRandomSplit extends RandomSplit
11			{
12			protected function splitDataset(Dataset $dataset, float $testSize): void
13			{
14			$datasets = $this->splitByTarget($dataset);
15
16			foreach ($datasets as $targetSet) {
17			parent::splitDataset($targetSet, $testSize);
18			}
19			}
20
21			/**
22			* @return Dataset[]
23			*/
24			private function splitByTarget(Dataset $dataset): array
25			{
26			$targets = $dataset->getTargets();
27			$samples = $dataset->getSamples();
28
29			$uniqueTargets = array_unique($targets);
30			/** @var array $split */
31			$split = array_combine($uniqueTargets, array_fill(0, count($uniqueTargets), []));
32
33			foreach ($samples as $key => $sample) {
34			$split[$targets[$key]][] = $sample;
35			}
36
37			return $this->createDatasets($uniqueTargets, $split);
38			}
39
40			private function createDatasets(array $uniqueTargets, array $split): array
41			{
42			$datasets = [];
43			foreach ($uniqueTargets as $target) {
44			$datasets[$target] = new ArrayDataset($split[$target], array_fill(0, count($split[$target]), $target));
45			}
46
47			return $datasets;
48			}
49			}
50

php-ai / php-ml

StratifiedRandomSplit::splitByTarget() A last analyzed 2020-05-15 05:48 UTC

Complexity

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StratifiedRandomSplit::splitByTarget() A
last analyzed 2020-05-15 05:48 UTC