ec.app.ordertree

Class OrderTree

java.lang.Object

ec.Problem

ec.gp.GPProblem

ec.app.ordertree.OrderTree

All Implemented Interfaces:

Prototype, Setup, SimpleProblemForm, Serializable, Cloneable

public class OrderTree
extends GPProblem
implements SimpleProblemForm

OrderTree implements the OrderTree problem of Hoang et al. See the README.txt. Note that although this is a tunable problem, tuning is achieved by setting the function and terminal sets. No need for a size parameter.

Parameters

base.data classname, inherits or == ec.app.ordertree.OrderTreeData

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

base.contribution-type
Integer specifying the amount of nonlinearity in fitness contributions 0: add unit; 1: add node value; 2: add node value squared; 3: add 3^node value

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) static int	CONTRIBUTION_EXPONENTIAL
(package private) static int	CONTRIBUTION_SQUARE
(package private) static int	CONTRIBUTION_UNIT
(package private) static int	CONTRIBUTION_VALUE
(package private) double	fitness
(package private) int	fitnessContributionType
(package private) static String	P_CONTRIBUTION_TYPE

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
OrderTree()

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	fitnessContribution(double value, EvolutionState state)
(package private) void	nodeCal(GPNode p, EvolutionState state)
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, 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

fitness

double fitness

P_CONTRIBUTION_TYPE

static final String P_CONTRIBUTION_TYPE

See Also:

Constant Field Values

CONTRIBUTION_UNIT

static final int CONTRIBUTION_UNIT

See Also:

Constant Field Values

CONTRIBUTION_VALUE

static final int CONTRIBUTION_VALUE

See Also:

Constant Field Values

CONTRIBUTION_SQUARE

static final int CONTRIBUTION_SQUARE

See Also:

Constant Field Values

CONTRIBUTION_EXPONENTIAL

static final int CONTRIBUTION_EXPONENTIAL

See Also:

Constant Field Values

fitnessContributionType

int fitnessContributionType

Constructor Detail

OrderTree

public OrderTree()

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

fitnessContribution

double fitnessContribution(double value,
                         EvolutionState state)

nodeCal

void nodeCal(GPNode p,
           EvolutionState state)