ec.app.klandscapes

Class KLandscapes

java.lang.Object

ec.Problem

ec.gp.GPProblem

ec.app.klandscapes.KLandscapes

All Implemented Interfaces:

Prototype, Setup, SimpleProblemForm, Serializable, Cloneable

public class KLandscapes
extends GPProblem
implements SimpleProblemForm

KLandscapes implements the K-Landscapes problem of Vanneschi, Castelli and Manzoni. See the README.txt.

Parameters

base.data classname, inherits or == ec.app.klandscapes.KLandscapesData

(the class for the prototypical GPData object for the KLandscapes problem)

base.k-value
Integer specifying the amount of epistasis in fitness contributions Values from 0 upwards.

Parameter bases

base.data

species (the GPData object)

Version:

1.0

Author:

Luca Manzoni

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
(package private) double	bestFitness
(package private) double[][]	edgeScore
(package private) int[]	indices
(package private) int	k
(package private) double[]	nodeScore
(package private) String	P_KVALUE
(package private) String	P_PROBLEMNAME

Fields inherited from class ec.gp.GPProblem

input, P_DATA, P_GPPROBLEM, P_STACK, stack

Fields inherited from class ec.Problem

P_PROBLEM

Constructor Summary

Constructors

Constructor and Description
KLandscapes()

Method Summary

Methods

Modifier and Type	Method and Description
Object	clone() Creates a new individual cloned from a prototype, and suitable to begin use in its own evolutionary context.
(package private) double	computeBestFitness()
void	evaluate(EvolutionState state, Individual ind, int subpopulation, int threadnum) Evaluates the individual in ind, if necessary (perhaps not evaluating them if their evaluated flags are true), and sets their fitness appropriately.
(package private) double	fitness(GPNode root)
(package private) double	fitnessHelper(GPNode node)
(package private) int	getIndex(char c)
void	setup(EvolutionState state, Parameter base) Sets up the object by reading it from the parameters stored in state, built off of the parameter base base.
(package private) double	subtreeFitness(GPNode node, int depth)

Methods inherited from class ec.gp.GPProblem

defaultBase

Methods inherited from class ec.Problem

canEvaluate, closeContacts, describe, describe, finishEvaluating, initializeContacts, prepareToEvaluate, reinitializeContacts

Methods inherited from class java.lang.Object

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

Methods inherited from interface ec.simple.SimpleProblemForm

describe

Field Detail

nodeScore

double[] nodeScore

edgeScore

double[][] edgeScore

bestFitness

double bestFitness

k

int k

P_PROBLEMNAME

String P_PROBLEMNAME

P_KVALUE

String P_KVALUE

indices

int[] indices

Constructor Detail

KLandscapes

public KLandscapes()

Method Detail

setup

public void setup(EvolutionState state,
         Parameter base)

Description copied from interface: Prototype

Sets up the object by reading it from the parameters stored in state, built off of the parameter base base. If an ancestor implements this method, be sure to call super.setup(state,base); before you do anything else.

For prototypes, setup(...) is typically called once for the prototype instance; cloned instances do not receive the setup(...) call. setup(...) may be called more than once; the only guarantee is that it will get called at least once on an instance or some "parent" object from which it was ultimately cloned.

Specified by:

setup in interface Prototype

Specified by:

setup in interface Setup

Overrides:

setup in class GPProblem

getIndex

int getIndex(char c)

evaluate

public void evaluate(EvolutionState state,
            Individual ind,
            int subpopulation,
            int threadnum)

Description copied from interface: SimpleProblemForm

Evaluates the individual in ind, if necessary (perhaps not evaluating them if their evaluated flags are true), and sets their fitness appropriately.

Specified by:

evaluate in interface SimpleProblemForm

fitness

double fitness(GPNode root)

fitnessHelper

double fitnessHelper(GPNode node)

subtreeFitness

double subtreeFitness(GPNode node,
                    int depth)

computeBestFitness

double computeBestFitness()

clone

public Object clone()

Description copied from interface: Prototype

Creates a new individual cloned from a prototype, and suitable to begin use in its own evolutionary context.

Typically this should be a full "deep" clone. However, you may share certain elements with other objects rather than clone hem, depending on the situation:

• If you hold objects which are shared with other instances, don't clone them.
• If you hold objects which must be unique, clone them.
• If you hold objects which were given to you as a gesture of kindness, and aren't owned by you, you probably shouldn't clone them.
• DON'T attempt to clone: Singletons, Cliques, or Groups.
• Arrays are not cloned automatically; you may need to clone an array if you're not sharing it with other instances. Arrays have the nice feature of being copyable by calling clone() on them.

Implementations.

• If no ancestor of yours implements clone(), and you have no need to do clone deeply, and you are abstract, then you should not declare clone().
• If no ancestor of yours implements clone(), and you have no need to do clone deeply, and you are not abstract, then you should implement it as follows:

   public Object clone() 
       {
       try
           { 
           return super.clone();
           }
       catch ((CloneNotSupportedException e)
           { throw new InternalError(); } // never happens
       }
          

• If no ancestor of yours implements clone(), but you need to deep-clone some things, then you should implement it as follows:

   public Object clone() 
       {
       try
           { 
           MyObject myobj = (MyObject) (super.clone());
  
           // put your deep-cloning code here...
           }
       catch ((CloneNotSupportedException e)
           { throw new InternalError(); } // never happens
       return myobj;
       } 
          

• If an ancestor has implemented clone(), and you also need to deep clone some things, then you should implement it as follows:

   public Object clone() 
       { 
       MyObject myobj = (MyObject) (super.clone());
  
       // put your deep-cloning code here...
  
       return myobj;
       } 
          

Specified by:

clone in interface Prototype

Overrides:

clone in class GPProblem