hep.aida.ref.pdf

Class FunctionDerivative

java.lang.Object

hep.aida.ref.pdf.FunctionDerivative

public abstract class FunctionDerivative
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
FunctionDerivative()

Method Summary

Modifier and Type	Method and Description
static double	derivative(Function f, Variable x, double h) Computes the derivative of a function with respect to one argument.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FunctionDerivative

public FunctionDerivative()

Method Detail

derivative

public static double derivative(Function f,
                                Variable x,
                                double h)

Computes the derivative of a function with respect to one argument. Adapted from Numerical Recipes in FORTRAN dfridr, pp. 182-183.

Parameters:

f - a JAIDA IFunction

x - a double[] with the point where the derivative is evaluated

ind - the index of the argument of f we differentiate wrto

h - a typical step size for x[ind]

Returns:

the value of df/dx[ind] at x[]