2016-08-02 11:07:47 +00:00
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<?php
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2016-11-20 21:53:17 +00:00
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declare(strict_types=1);
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2016-08-02 11:07:47 +00:00
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namespace Phpml\NeuralNetwork\ActivationFunction;
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use Phpml\NeuralNetwork\ActivationFunction;
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class Gaussian implements ActivationFunction
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{
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/**
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* @param float|int $value
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*/
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2017-11-22 21:16:10 +00:00
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public function compute($value): float
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2016-08-02 11:07:47 +00:00
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{
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return exp(-pow($value, 2));
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}
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2018-01-09 10:09:59 +00:00
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/**
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* @param float|int $value
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* @param float|int $calculatedvalue
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*/
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public function differentiate($value, $calculatedvalue): float
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{
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return -2 * $value * $calculatedvalue;
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}
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2016-08-02 11:07:47 +00:00
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}
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