Package etomica.math.function

Interface FunctionMultiDimensionalDifferentiable

All Superinterfaces:

FunctionMultiDimensional

All Known Implementing Classes:

CalcGradientDifferentiable, FiniteDifferenceDerivative

public interface FunctionMultiDimensionalDifferentiable
extends FunctionMultiDimensional

Interface for multi-dimensional 1-D differentiable function

Method Summary

Modifier and Type	Method	Description
double	df(int[] d, double[] x)	Returns the derivative indicated by the array d evaluated at the given point x.

Methods inherited from interface etomica.math.function.FunctionMultiDimensional

f, getDimension

Method Detail

df

double df(int[] d,
          double[] x)

Returns the derivative indicated by the array d evaluated at the given point x. The array d should be the same length as x. Each entry of d specifies the order of the derivative taken with respect to the corresponding variable in x. For example, for a function on a 2-dimensional space, d = {2,0}, indicates d2f/dx[0]^2, while d = {1,1}, indicates d2f/dx[0]dx[1]; d = {2,1} indicates d3f/dx[0]^2dx[1]; etc.