TfIdfTransformer::transform() - Code Metrics - Inspection of "implement TfIdf transformation" - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

Completed

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by Arkadiusz

created 2016-06-15 14:04 UTC

TfIdfTransformer::transform() A

↳ Parent: TfIdfTransformer

Complexity

Conditions	4
Paths	6

Size

Total Lines	17
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	17
rs	9.2
c	0
b	0
f	0
cc	4
eloc	9
nc	6
nop	1

<?php

declare (strict_types = 1);

namespace Phpml\FeatureExtraction;

class TfIdfTransformer implements Transformer
{
    /**
     * @var array
     */
    private $idf;

    /**
     * @param array $samples
     * 
     * @return array
     */
    public function transform(array $samples): array
    {
        $this->countTokensFrequency($samples);

        $count = count($samples);
        foreach ($this->idf as &$value) {
            $value = log($count / $value, 10);
        }

        foreach ($samples as &$sample) {
            foreach ($sample as $index => &$feature) {
                $feature = $feature * $this->idf[$index];
            }
        }

        return $samples;
    }

    /**
     * @param array $samples
     *
     * @return array
     */
    private function countTokensFrequency(array $samples)
    {
        $this->idf = array_fill_keys(array_keys($samples[0]), 0);

        foreach ($samples as $sample) {
            foreach ($sample as $index => $count) {
                if ($count > 0) {
                    ++$this->idf[$index];
                }
            }
        }
    }
}


1			<?php
2
3			declare (strict_types = 1);
4
5			namespace Phpml\FeatureExtraction;
6
7			class TfIdfTransformer implements Transformer
8			{
9			/**
10			* @var array
11			*/
12			private $idf;
13
14			/**
15			* @param array $samples
16			*
17			* @return array
18			*/
19			public function transform(array $samples): array
20			{
21			$this->countTokensFrequency($samples);
22
23			$count = count($samples);
24			foreach ($this->idf as &$value) {
25			$value = log($count / $value, 10);
26			}
27
28			foreach ($samples as &$sample) {
29			foreach ($sample as $index => &$feature) {
30			$feature = $feature * $this->idf[$index];
31			}
32			}
33
34			return $samples;
35			}
36
37			/**
38			* @param array $samples
39			*
40			* @return array
41			*/
42			private function countTokensFrequency(array $samples)
43			{
44			$this->idf = array_fill_keys(array_keys($samples[0]), 0);
45
46			foreach ($samples as $sample) {
47			foreach ($sample as $index => $count) {
48			if ($count > 0) {
49			++$this->idf[$index];
50			}
51			}
52			}
53			}
54			}
55

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TfIdfTransformer::transform() A

Complexity

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Duplication

Importance

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