math.fun

Interface Gradient

All Known Subinterfaces:

DiffDMultiFunction

All Known Implementing Classes:

NumericalDiffDMultiFunction

public interface Gradient

Interface for the gradient of once-differentiable double-valued functions over double[] arrays.

Method Summary

Modifier and Type	Method and Description
void	derivativeAt(double[] x, double[] grad) The first-derivative vector (a.k.a. gradient) of a double-valued function over a double[] array evaluated at the input location x gets stored into the output vector grad.

Method Detail

derivativeAt

void derivativeAt(double[] x,
                  double[] grad)

The first-derivative vector (a.k.a. gradient) of a double-valued function over a double[] array evaluated at the input location x gets stored into the output vector grad.

Parameters:

x - a double[] input vector (not modified)

grad - a double[] output vector containing the gradient at location x (modified)