40 lines
863 B
PHP
40 lines
863 B
PHP
<?php
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declare (strict_types = 1);
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namespace Phpml\Metric;
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use Phpml\Exception\InvalidArgumentException;
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class Accuracy
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{
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/**
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* @param array $actualLabels
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* @param array $predictedLabels
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* @param bool $normalize
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*
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* @return float|int
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*
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* @throws InvalidArgumentException
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*/
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public static function score(array $actualLabels, array $predictedLabels, bool $normalize = true)
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{
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if (count($actualLabels) != count($predictedLabels)) {
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throw InvalidArgumentException::sizeNotMatch();
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}
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$score = 0;
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foreach ($actualLabels as $index => $label) {
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if ($label == $predictedLabels[$index]) {
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++$score;
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}
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}
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if ($normalize) {
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$score = $score / count($actualLabels);
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}
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return $score;
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}
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}
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