ec.app.gpsemantics

Class Semantic

java.lang.Object

ec.Problem

ec.gp.GPProblem

ec.app.gpsemantics.Semantic

All Implemented Interfaces:

Prototype, Setup, SimpleProblemForm, java.io.Serializable, java.lang.Cloneable

public class Semantic
extends GPProblem
implements SimpleProblemForm

Implements Goldberg and O'Reilly's semantic Order and Majority problems. See the README.

Parameters

base.data classname, inherits or == ec.gp.gpdata

(the class for the prototypical GPData object)

Parameter bases

base.data

species (the GPData object)

Class representing Semantic Order and Majority problems. This problem has a size: typical size is 16, which means the terminals are [X0, N0, ... X16, N16]. For Order, fitness is 1 for every time when Xi occurs before Ni, in an inorder traversal. For Majority, fitness is 1 for every time when Xi occurs more often than Ni.

See Also:

Serialized Form

Field Summary

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
Semantic()

Method Summary

Modifier and Type	Method and Description
void	describe(EvolutionState state, Individual ind, int subpopulation, int threadnum, int log) Part of SimpleProblemForm.
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.
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.

Methods inherited from class ec.gp.GPProblem

clone, defaultBase

Methods inherited from class ec.Problem

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Semantic

public Semantic()

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

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

describe

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

Description copied from class: Problem

Part of SimpleProblemForm. Included here so you don't have to write the default version, which usually does nothing.

Specified by:

describe in interface SimpleProblemForm

Overrides:

describe in class Problem