Passed
Push — master ( 9938cf...e83f7b )
by Arkadiusz
05:59
created

Sigmoid::differentiate()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 4
Code Lines 2

Duplication

Lines 4
Ratio 100 %

Importance

Changes 0
Metric Value
dl 4
loc 4
rs 10
c 0
b 0
f 0
cc 1
eloc 2
nc 1
nop 2
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<?php
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declare(strict_types=1);
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namespace Phpml\NeuralNetwork\ActivationFunction;
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use Phpml\NeuralNetwork\ActivationFunction;
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9 View Code Duplication
class Sigmoid implements ActivationFunction
0 ignored issues
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Duplication introduced by Arkadiusz Kondas
This class 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.

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{
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    /**
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     * @var float
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     */
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    private $beta;
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    public function __construct(float $beta = 1.0)
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    {
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        $this->beta = $beta;
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    }
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    /**
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     * @param float|int $value
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     */
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    public function compute($value): float
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    {
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        return 1 / (1 + exp(-$this->beta * $value));
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    }
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    /**
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     * @param float|int $value
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     * @param float|int $computedvalue
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     */
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    public function differentiate($value, $computedvalue): float
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    {
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        return $computedvalue * (1 - $computedvalue);
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    }
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}
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