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