com.reportmill.base

Class RMMath.RMFunc

java.lang.Object

com.reportmill.base.RMMath.RMFunc

Direct Known Subclasses:

RMCurveFit.InverseFunc, RMCurveFit.NevilleFunc, RMCurveFit.ScaledFunc

Enclosing class:

RMMath

public abstract static class RMMath.RMFunc
extends java.lang.Object

A class used to specify an arbitrary mathematical function.

Constructor Summary

Constructors

Constructor and Description
RMMath.RMFunc()

Method Summary

Methods

Modifier and Type	Method and Description
abstract double	f(double x)
double	fprime(double x, int order) nth derivative of function at x.
double	integrate(double start, double end, int npts) Numerical integration of a function in the interval [start, end].
double	solve(double a) Uses Newton's method to find numerical solution to f(x)=a.

Methods inherited from class java.lang.Object

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

Constructor Detail

RMMath.RMFunc

public RMMath.RMFunc()

Method Detail

f

public abstract double f(double x)

fprime

public double fprime(double x,
            int order)

nth derivative of function at x. Base class calculates it numerically, but you could override this if you know the exact form. order=1 for first derivative, 2 for second derivative, etc.

integrate

public double integrate(double start,
               double end,
               int npts)

Numerical integration of a function in the interval [start, end]. Uses composite Simpson's method. (override if you know the exact form)

solve

public double solve(double a)

Uses Newton's method to find numerical solution to f(x)=a. (override if you know the exact solution)