com.imsl.math

Interface NumericalDerivatives.Function

All Known Subinterfaces:

NumericalDerivatives.Jacobian

Enclosing class:

NumericalDerivatives

public static interface NumericalDerivatives.Function

Public interface function.

Method Summary

Modifier and Type	Method and Description
double[]	f(int varIndex, double[] y) Returns the equations evaluated at the point y.

Method Detail

f

double[] f(int varIndex,
           double[] y)

Returns the equations evaluated at the point y. If the user does not override the evaluateF method, then f is also used to compute the function values at the current independent variable values \(y_e\).

Parameters:

varIndex - an int indicating the index of the variable to perturb. varIndex = 1 indicates variable 1 in y[0].

y - a double array of length n, the point at which the Jacobian is to be evaluated.

Returns:

a double array of length m. The equations evaluated at the point y.