ec.app.royaltree

Class RoyalTree

java.lang.Object

ec.Problem

ec.gp.GPProblem

ec.app.royaltree.RoyalTree

All Implemented Interfaces:

Prototype, Setup, SimpleProblemForm, Serializable, Cloneable

public class RoyalTree
extends GPProblem
implements SimpleProblemForm

RoyalTree implements Punch's RoyalTree problem. See the README.txt.

Parameters

base.data classname, inherits or == ec.app.royaltree.RoyalTreeData

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

Parameter bases

base.data

species (the GPData object)

Version:

1.0

Author:

James McDermott

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
(package private) char[]	successors

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
RoyalTree()

Method Summary

Methods

Modifier and Type	Method and Description
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 node, EvolutionState state)
(package private) boolean	isPerfect(char parent, GPNode node, EvolutionState state) Calculate whether the tree rooted at n is a perfect subtree of the appropriate type given the current parent.
(package private) boolean	isSuccessor(char p, char q, EvolutionState state)

Methods inherited from class ec.gp.GPProblem

clone, defaultBase, setup

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

successors

char[] successors

Constructor Detail

RoyalTree

public RoyalTree()

Method Detail

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 node,
             EvolutionState state)

isSuccessor

boolean isSuccessor(char p,
                  char q,
                  EvolutionState state)

Parameters:

p - parent

q - child

Returns:

whether q is the correct "successor", eg p = B and q = A

isPerfect

boolean isPerfect(char parent,
                GPNode node,
                EvolutionState state)

Calculate whether the tree rooted at n is a perfect subtree of the appropriate type given the current parent.

Parameters:

parent -

n - root of the sub-tree to be tested.

Returns:

whether it is a perfect subtree of the right type.