48 lines
1.1 KiB
PHP
48 lines
1.1 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Preprocessing;
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final class NumberConverter implements Preprocessor
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{
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/**
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* @var bool
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*/
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private $transformTargets;
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/**
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* @var mixed
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*/
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private $nonNumericPlaceholder;
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/**
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* @param mixed $nonNumericPlaceholder
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*/
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public function __construct(bool $transformTargets = false, $nonNumericPlaceholder = null)
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{
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$this->transformTargets = $transformTargets;
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$this->nonNumericPlaceholder = $nonNumericPlaceholder;
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}
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public function fit(array $samples, ?array $targets = null): void
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{
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//nothing to do
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}
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public function transform(array &$samples, ?array &$targets = null): void
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{
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foreach ($samples as &$sample) {
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foreach ($sample as &$feature) {
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$feature = is_numeric($feature) ? (float) $feature : $this->nonNumericPlaceholder;
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}
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}
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if ($this->transformTargets && is_array($targets)) {
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foreach ($targets as &$target) {
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$target = is_numeric($target) ? (float) $target : $this->nonNumericPlaceholder;
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}
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}
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}
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}
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