Package org.ddogleg.optimization.loss

Class LossWeighted

java.lang.Object

org.ddogleg.optimization.loss.LossWeighted

All Implemented Interfaces:

FunctionNtoN, FunctionNtoS, LossFunction, LossFunctionGradient

Direct Known Subclasses:

LossIRLS

public class LossWeighted
extends Object
implements LossFunction, LossFunctionGradient

A weighted least squares cost function. Weights are fixed and never updated.

Field Summary

Fields

Modifier and Type	Field	Description
protected double[]	weights	Weight assigned to each function

Constructor Summary

Constructors

Constructor	Description
LossWeighted()

Method Summary

Modifier and Type	Method	Description
int	getNumberOfFunctions()	Number of elements in the residual
double	process(double[] input)	Computes the lost function
void	process(double[] input, double[] output)	Computes the gradient
void	setNumberOfFunctions(int value)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.ddogleg.optimization.loss.LossFunction

fixate, getNumOfInputsN

Methods inherited from interface org.ddogleg.optimization.loss.LossFunctionGradient

getN

Field Details

weights

protected double[] weights

Weight assigned to each function

Constructor Details

LossWeighted

public LossWeighted()

Method Details

process

public double process(double[] input)

Computes the lost function

Specified by:

process in interface FunctionNtoS

Parameters:

input - Array containing input values

Returns:

The output.

process

public void process(double[] input,
 double[] output)

Computes the gradient

Specified by:

process in interface FunctionNtoN

Parameters:

input - Array with the inputs of length N. Not modified.

output - Array for storing the output of length N. Modified.

getNumberOfFunctions

public int getNumberOfFunctions()

Description copied from interface: LossFunction

Number of elements in the residual

Specified by:

getNumberOfFunctions in interface LossFunction

Specified by:

getNumberOfFunctions in interface LossFunctionGradient

setNumberOfFunctions

public void setNumberOfFunctions(int value)

Specified by:

setNumberOfFunctions in interface LossFunction

Specified by:

setNumberOfFunctions in interface LossFunctionGradient