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<?php
namespace devfym\IntelliPHP\Math;
class Activation
{
/**
* @param float $input
* @return float
*/
public static function ReLU(float $input) : float
return max(0, $input);
}
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;
devfym /
intelliphp
