devfym\IntelliPHP\Math\Activation

Complexity

Total Complexity

4

Size/Duplication

Total Lines	39
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	1

3 Methods

Rating	Name	Duplication	Size	Complexity
A	Softmax()	0	15	2
A	Sigmoid()	0	3	1
A	ReLU()	0	3	1

<?php

namespace devfym\IntelliPHP\Math;

class Activation
{
    /**
     * @param float $input
     * @return float
     */
    public static function ReLU(float $input) : float
    {
        return max(0, $input);
    }

    /**
     * @param float $input
     * @return float
     */
    public static function Sigmoid(float $input) : float
    {
        return round(1 / (1 + exp(-$input)), 4);
    }

    /**
     * @param array $inputs
     * @return array
     */
    public static function Softmax(array $inputs) : array
    {
        $exp = array_map('exp', $inputs);

        $sum_exp = array_sum($exp);

        $y = [];

        foreach($exp as $e) {

            array_push($y,$e / $sum_exp);

        }

        return $y;
    }
}