MCordingley\Regression\Algorithm\GradientDescent\Schedule\Schedule::step PHP 메소드

    public function step(int $featureIndex) : float;

 /**
  * @param array $coefficients
  * @param array $gradient
  * @return array
  */
 private function updateCoefficients(array $coefficients, array $gradient) : array
 {
     foreach ($gradient as $i => $slope) {
         $coefficients[$i] -= $this->schedule->step($i) * $slope;
     }
     return $coefficients;
 }