org.ascape.util
Class Function

java.lang.Object
  org.ascape.util.Function

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public abstract class Function
extends java.lang.Object
implements java.io.Serializable, java.lang.Cloneable

A one-dimensional function.

Since:

1.0

Version:

1.0

Author:

Miles Parker

See Also:

Serialized Form

Field Summary

static double	resolution Desired resolution of maximization.
static double	sectLarge Large end of golden section.
static double	sectSmall Small end of golden section.
static double	tau Tau "magic" number.

Constructor Summary

Function()

Method Summary

java.lang.Object	clone() Clones this function.
double	maximize() Maximize the output of this function, assuming function is unimodal, using a golden section search strategy.
double	solveFor(double x) Solve this (single-variable) function.

Methods inherited from class java.lang.Object

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

Field Detail

tau

public static final double tau

Tau "magic" number. ~1.61803

sectLarge

public static final double sectLarge

Large end of golden section. ~.61803

sectSmall

public static final double sectSmall

Small end of golden section. ~.38197

resolution

public static final double resolution

Desired resolution of maximization.

See Also:

Constant Field Values

Constructor Detail

Function

public Function()

Method Detail

maximize

public double maximize()

Maximize the output of this function, assuming function is unimodal, using a golden section search strategy. See Press, Flannery, Teukolsky, Vetterling _Numerical Recipes in *_ 10.1 for general guidelines, but not for specific implementation.

Returns:

the optimal input variable

solveFor

public double solveFor(double x)

Solve this (single-variable) function. Override to define your own function.

Parameters:

x - the variable input parameter

Returns:

the output value

clone

public java.lang.Object clone()

Clones this function.

Overrides:

clone in class java.lang.Object