org.omegahat.Numerics.Optimizers
Class BasicDerivatives

java.lang.Object
  |
  +--org.omegahat.Numerics.Optimizers.BasicDerivatives

All Implemented Interfaces:

Derivatives, Evaluable, Gradient, Hessian

public class BasicDerivatives

extends java.lang.Object

implements Derivatives

Field Summary

protected Gradient	gradient Object used to compute the first derivative at different values of the argument, not the value itself.
protected Hessian	hessian Object used to compute the second derivative at different values of the argument, not the value itself.

Constructor Summary

BasicDerivatives(Gradient gradient, Hessian hessian)

Method Summary

DerivativeValues	derivativeValues(ParameterSet params)
java.lang.Object	eval(Evaluator evaluator)
java.lang.Object	eval(java.lang.Object[] args, Evaluator evaluator)
Gradient	getGradient()
Hessian	getHessian()
double[]	gradient(ParameterSet params)
Matrix	hessian(ParameterSet params)
Gradient	setGradient(Gradient g)
Hessian	setHessian(Hessian h)

Methods inherited from class java.lang.Object

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

Field Detail

gradient

protected Gradient gradient

Object used to compute the first derivative at different values of the argument, not the value itself.

hessian

protected Hessian hessian

Object used to compute the second derivative at different values of the argument, not the value itself.

Constructor Detail

BasicDerivatives

public BasicDerivatives(Gradient gradient,
                        Hessian hessian)

Method Detail

gradient

public double[] gradient(ParameterSet params)
                  throws java.lang.Throwable

Specified by:

gradient in interface Gradient

hessian

public Matrix hessian(ParameterSet params)
               throws java.lang.Throwable

Specified by:

hessian in interface Hessian

derivativeValues

public DerivativeValues derivativeValues(ParameterSet params)

Specified by:

derivativeValues in interface Derivatives

eval

public java.lang.Object eval(java.lang.Object[] args,
                             Evaluator evaluator)

Specified by:

eval in interface Evaluable

eval

public java.lang.Object eval(Evaluator evaluator)
                      throws java.lang.Throwable

Specified by:

eval in interface Evaluable

getHessian

public Hessian getHessian()

setHessian

public Hessian setHessian(Hessian h)

getGradient

public Gradient getGradient()

setGradient

public Gradient setGradient(Gradient g)