for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
<?php
declare (strict_types = 1);
namespace Phpml\NeuralNetwork\ActivationFunction;
use Phpml\NeuralNetwork\ActivationFunction;
class Sigmoid implements ActivationFunction
{
/**
* @var float
*/
private $beta;
* @param float $beta
public function __construct($beta = 1.0)
$this->beta = $beta;
}
* @param float|int $value
*
* @return float
public function compute($value): float
return 1 / (1 + exp(-$this->beta * $value));
php-ai /
php-ml
