dev.nm.analysis.function.special

Class Rastrigin

java.lang.Object

dev.nm.analysis.function.rn2r1.AbstractRealScalarFunction

dev.nm.analysis.function.special.Rastrigin

All Implemented Interfaces:

Function<Vector,Double>, RealScalarFunction

public class Rastrigin
extends AbstractRealScalarFunction

The Rastrigin function is a non-convex function used as a performance test problem for optimization algorithms. It is a typical example of non-linear multimodal function. Finding the minimum of this function is a fairly difficult problem due to its large search space and its large number of local minima.

See Also:

Wikipedia: Rastrigin function

Nested Class Summary

Nested classes/interfaces inherited from interface dev.nm.analysis.function.Function

Function.EvaluationException

Constructor Summary

Constructors

Constructor and Description
Rastrigin(int dim) Constructs a Rastrigin function.

Method Summary

Modifier and Type	Method and Description
Double	evaluate(Vector x) Evaluate the function f at x, where x is from the domain.

Methods inherited from class dev.nm.analysis.function.rn2r1.AbstractRealScalarFunction

dimensionOfDomain, dimensionOfRange

Methods inherited from class java.lang.Object

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

Constructor Detail

Rastrigin

public Rastrigin(int dim)

Constructs a Rastrigin function.

Parameters:

dim - the dimension of the Rastrigin function

Method Detail

evaluate

public Double evaluate(Vector x)

Description copied from interface: Function

Evaluate the function f at x, where x is from the domain.

Parameters:

x - x

Returns:

f(x)