ConfusionMatrix::compute() - Code Metrics - Inspection of "Properly check cluster points label (#323)" - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 53c5a6...f2dd40 )

by Arkadiusz

created 2018-10-29 19:04 UTC

ConfusionMatrix::compute() A

↳ Parent: ConfusionMatrix

Complexity

Conditions	5
Paths	8

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	24
rs	9.2248
c	0
b	0
f	0
cc	5
nc	8
nop	3

<?php

declare(strict_types=1);

namespace Phpml\Metric;

class ConfusionMatrix
{
    public static function compute(array $actualLabels, array $predictedLabels, array $labels = []): array
    {
        $labels = count($labels) === 0 ? self::getUniqueLabels($actualLabels) : array_flip($labels);
        $matrix = self::generateMatrixWithZeros($labels);

        foreach ($actualLabels as $index => $actual) {
            $predicted = $predictedLabels[$index];

            if (!isset($labels[$actual], $labels[$predicted])) {
                continue;
            }

            if ($predicted === $actual) {
                $row = $column = $labels[$actual];
            } else {
                $row = $labels[$actual];
                $column = $labels[$predicted];
            }

            ++$matrix[$row][$column];
        }

        return $matrix;
    }

    private static function generateMatrixWithZeros(array $labels): array
    {
        $count = count($labels);
        $matrix = [];

        for ($i = 0; $i < $count; ++$i) {
            $matrix[$i] = array_fill(0, $count, 0);
        }

        return $matrix;
    }

    private static function getUniqueLabels(array $labels): array
    {
        $labels = array_values(array_unique($labels));
        sort($labels);

        return array_flip($labels);
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace Phpml\Metric;
6
7			class ConfusionMatrix
8			{
9			public static function compute(array $actualLabels, array $predictedLabels, array $labels = []): array
10			{
11			$labels = count($labels) === 0 ? self::getUniqueLabels($actualLabels) : array_flip($labels);
12			$matrix = self::generateMatrixWithZeros($labels);
13
14			foreach ($actualLabels as $index => $actual) {
15			$predicted = $predictedLabels[$index];
16
17			if (!isset($labels[$actual], $labels[$predicted])) {
18			continue;
19			}
20
21			if ($predicted === $actual) {
22			$row = $column = $labels[$actual];
23			} else {
24			$row = $labels[$actual];
25			$column = $labels[$predicted];
26			}
27
28			++$matrix[$row][$column];
29			}
30
31			return $matrix;
32			}
33
34			private static function generateMatrixWithZeros(array $labels): array
35			{
36			$count = count($labels);
37			$matrix = [];
38
39			for ($i = 0; $i < $count; ++$i) {
40			$matrix[$i] = array_fill(0, $count, 0);
41			}
42
43			return $matrix;
44			}
45
46			private static function getUniqueLabels(array $labels): array
47			{
48			$labels = array_values(array_unique($labels));
49			sort($labels);
50
51			return array_flip($labels);
52			}
53			}
54

php-ai / php-ml

Push — master ( 53c5a6...f2dd40 )

ConfusionMatrix::compute() A

Complexity

Size

Duplication

Importance

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