de.jstacs.algorithms.optimization
Class NegativeFunction

java.lang.Object
  de.jstacs.algorithms.optimization.NegativeFunction

All Implemented Interfaces:

Function

public class NegativeFunction
extends Object
implements Function

The Function -f for a given function f.

Author:

Jens Keilwagen

Constructor Summary

NegativeFunction(Function f)
Creates the function f for which -f should be calculated.

Method Summary

double	evaluateFunction(double[] x) Evaluates the function at a certain vector (in mathematical sense) x.
int	getDimensionOfScope() Returns the dimension of the scope of the function.

Methods inherited from class java.lang.Object

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

Constructor Detail

NegativeFunction

public NegativeFunction(Function f)

Creates the function f for which -f should be calculated.

Parameters:

f - the function

Method Detail

evaluateFunction

public double evaluateFunction(double[] x)
                        throws DimensionException,
                               EvaluationException

Description copied from interface: Function

Evaluates the function at a certain vector (in mathematical sense) x.

Specified by:

evaluateFunction in interface Function

Parameters:

x - the current vector

Returns:

the evaluation of the function

Throws:

DimensionException - if dim(x) != n, with f: R^n -> R

EvaluationException - if there was a mistake in evaluating the function

getDimensionOfScope

public int getDimensionOfScope()

Description copied from interface: Function

Returns the dimension of the scope of the function.

Specified by:

getDimensionOfScope in interface Function

Returns:

dimension of the scope; n, with f: R^n -> R