37 lines
817 B
PHP
37 lines
817 B
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Classification;
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use Phpml\Helper\Predictable;
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use Phpml\Helper\Trainable;
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class NaiveBayes implements Classifier
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{
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use Trainable, Predictable;
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/**
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* @param array $sample
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*
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* @return mixed
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*/
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protected function predictSample(array $sample)
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{
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$predictions = [];
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foreach ($this->targets as $index => $label) {
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$predictions[$label] = 0;
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foreach ($sample as $token => $count) {
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if (array_key_exists($token, $this->samples[$index])) {
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$predictions[$label] += $count * $this->samples[$index][$token];
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}
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}
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}
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arsort($predictions, SORT_NUMERIC);
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reset($predictions);
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return key($predictions);
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}
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}
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