org.ddogleg.optimization.wrap

Class CachedGradientLineFunction

java.lang.Object

org.ddogleg.optimization.wrap.CachedGradientLineFunction

All Implemented Interfaces:

CoupledDerivative, CoupledGradient, GradientLineFunction, LineSearchFunction

public class CachedGradientLineFunction
extends java.lang.Object
implements GradientLineFunction

From separate classes for the function and gradient computations implements GradientLineFunction. Results are cached until the next time a line set of parameters or line position is specified.

Constructor Summary

Constructors

Constructor and Description
CachedGradientLineFunction(FunctionNtoS function, FunctionNtoN gradient)

Method Summary

Modifier and Type	Method and Description
double	computeDerivative()
double	computeFunction()
void	computeGradient(double[] gradient)
double[]	getCurrentState()
int	getN()
void	setInput(double x)
void	setInput(double[] x)
void	setLine(double[] start, double[] direction)

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedGradientLineFunction

public CachedGradientLineFunction(FunctionNtoS function,
                                  FunctionNtoN gradient)

Method Detail

setLine

public void setLine(double[] start,
                    double[] direction)

Specified by:

setLine in interface LineSearchFunction

getCurrentState

public double[] getCurrentState()

Specified by:

getCurrentState in interface LineSearchFunction

setInput

public void setInput(double x)

Specified by:

setInput in interface CoupledDerivative

getN

public int getN()

Specified by:

getN in interface CoupledGradient

setInput

public void setInput(double[] x)

Specified by:

setInput in interface CoupledGradient

computeFunction

public double computeFunction()

Specified by:

computeFunction in interface CoupledDerivative

Specified by:

computeFunction in interface CoupledGradient

computeGradient

public void computeGradient(double[] gradient)

Specified by:

computeGradient in interface CoupledGradient

computeDerivative

public double computeDerivative()

Specified by:

computeDerivative in interface CoupledDerivative