NaiveBayes::predictSample() - Code Metrics - Inspection of "simple Naive Bayes classifier" - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

Completed

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by Arkadiusz

created 2016-04-15 20:15 UTC

NaiveBayes::predictSample() A

↳ Parent: NaiveBayes

Complexity

Conditions	4
Paths	4

Size

Total Lines	17
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	17
rs	9.2
cc	4
eloc	10
nc	4
nop	1

<?php

declare (strict_types = 1);

namespace Phpml\Classifier;

class NaiveBayes implements Classifier
{
    /**
     * @var array
     */
    private $samples;

    /**
     * @var array
     */
    private $labels;

    /**
     * @param array $samples
     * @param array $labels
     */
    public function train(array $samples, array $labels)
    {
        $this->samples = $samples;
        $this->labels = $labels;
    }

    /**
     * @param array $samples
     *
     * @return mixed
     */
    public function predict(array $samples)

    {
        if (!is_array($samples[0])) {
            $predicted = $this->predictSample($samples);
        } else {
            $predicted = [];
            foreach ($samples as $index => $sample) {
                $predicted[$index] = $this->predictSample($sample);
            }
        }

        return $predicted;
    }

    /**
     * @param array $sample
     *
     * @return mixed
     */
    private function predictSample(array $sample)
    {
        $predictions = [];
        foreach ($this->labels as $index => $label) {
            $predictions[$label] = 0;
            foreach ($sample as $token => $count) {
                if (array_key_exists($token, $this->samples[$index])) {
                    $predictions[$label] += $count * $this->samples[$index][$token];
                }
            }
        }

        arsort($predictions, SORT_NUMERIC);
        reset($predictions);

        return key($predictions);
    }
}


1		<?php
2
3		declare (strict_types = 1);
4
5		namespace Phpml\Classifier;
6
7		class NaiveBayes implements Classifier
8		{
9		/**
10		* @var array
11		*/
12		private $samples;
13
14		/**
15		* @var array
16		*/
17		private $labels;
18
19		/**
20		* @param array $samples
21		* @param array $labels
22		*/
23		public function train(array $samples, array $labels)
24		{
25		$this->samples = $samples;
26		$this->labels = $labels;
27		}
28
29		/**
30		* @param array $samples
31		*
32		* @return mixed
33		*/
34	View Code Duplication	public function predict(array $samples)
		0 ignored issues – show Duplication introduced 2016-04-15 20:17 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
35		{
36		if (!is_array($samples[0])) {
37		$predicted = $this->predictSample($samples);
38		} else {
39		$predicted = [];
40		foreach ($samples as $index => $sample) {
41		$predicted[$index] = $this->predictSample($sample);
42		}
43		}
44
45		return $predicted;
46		}
47
48		/**
49		* @param array $sample
50		*
51		* @return mixed
52		*/
53		private function predictSample(array $sample)
54		{
55		$predictions = [];
56		foreach ($this->labels as $index => $label) {
57		$predictions[$label] = 0;
58		foreach ($sample as $token => $count) {
59		if (array_key_exists($token, $this->samples[$index])) {
60		$predictions[$label] += $count * $this->samples[$index][$token];
61		}
62		}
63		}
64
65		arsort($predictions, SORT_NUMERIC);
66		reset($predictions);
67
68		return key($predictions);
69		}
70		}
71

php-ai / php-ml

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NaiveBayes::predictSample() A

Complexity

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