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<?php
declare(strict_types=1);
namespace Phpml\NeuralNetwork\ActivationFunction;
use Phpml\NeuralNetwork\ActivationFunction;
class ThresholdedReLU implements ActivationFunction
{
/**
* @var float
*/
private $theta;
public function __construct(float $theta = 0.0)
$this->theta = $theta;
}
* @param float|int $value
public function compute($value): float
return $value > $this->theta ? $value : 0.0;
* @param float|int $calculatedvalue
public function differentiate($value, $calculatedvalue): float
return $calculatedvalue >= $this->theta ? 1.0 : 0.0;