net.sourceforge.cilib.functions.continuous.unconstrained
Class Ackley

java.lang.Object
  net.sourceforge.cilib.functions.Function
      net.sourceforge.cilib.functions.ContinuousFunction
          net.sourceforge.cilib.functions.continuous.unconstrained.Ackley

All Implemented Interfaces:

Serializable, Cloneable

public class Ackley
extends ContinuousFunction

The Generalized Ackley.

Reference: T.Back, Evolutionary Algorithms in Theory and Practice, Oxford University Press, 1996

Minimum:

• f(x*) = 0
• x* = (0, 0, ...., 0)
• for x_i in [-32.768,32.768]

Characteristics:

• Multimodal
• Seperable
• Regular

Author:

Edwin Peer, Olusegun Olorunda

See Also:

Serialized Form

Constructor Summary

Ackley()

Method Summary

double	evaluate(Vector x) Evaluate the function with the given Vector as input.
Ackley	getClone() Create a cloned copy of the current object and return it.
Object	getMinimum() Accessor for the function minimum.

Methods inherited from class net.sourceforge.cilib.functions.ContinuousFunction

evaluate, getMaximum

Methods inherited from class net.sourceforge.cilib.functions.Function

getBehavioralDomainRegistry, getDimension, getDomain, getDomainRegistry, setBehavioralDomain, setBehaviouralDomainRegistry, setDomain

Methods inherited from class java.lang.Object

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

Constructor Detail

Ackley

public Ackley()

Method Detail

getClone

public Ackley getClone()

Description copied from class: ContinuousFunction

Create a cloned copy of the current object and return it. In general the created copy will be a deep copy of the provided instance. As a result this operation an be quite expensive if used incorrectly.

Specified by:

getClone in interface Cloneable

Specified by:

getClone in class ContinuousFunction

Returns:

An exact clone of the current object instance.

See Also:

Object.clone()

getMinimum

public Object getMinimum()

Description copied from class: ContinuousFunction

Accessor for the function minimum. This is the minimum value of the function in the given domain.

Overrides:

getMinimum in class ContinuousFunction

Returns:

The minimum function value.

evaluate

public double evaluate(Vector x)

Description copied from class: ContinuousFunction

Evaluate the function with the given Vector as input.

Specified by:

evaluate in class ContinuousFunction

Parameters:

x - The input Vector.

Returns:

The value of the evaluation.