keel.Algorithms.Genetic_Rule_Learning.CORE

Class Chromosome

java.lang.Object

keel.Algorithms.Genetic_Rule_Learning.CORE.Chromosome

All Implemented Interfaces:

java.lang.Comparable

public class Chromosome
extends java.lang.Object
implements java.lang.Comparable

This class represents the chromosome (rule) of the CORE algorithm

Constructor Summary

Constructors

Constructor and Description
Chromosome() Default constructor.
Chromosome(Chromosome c) Deep-copy constructor.

Method Summary

Modifier and Type	Method and Description
void	addNominalGene(int pos, Attribute a, int relation, java.util.ArrayList<java.lang.String> values) Adds a nominal gene to this chromosome (rule)
void	addRealBoundedGene(int pos, Attribute a, int relation, double[] value) Adds a real-valued gene, and sets its bounds
void	addRealGene(int pos, Attribute a, int relation, double value) Adds a real valued gene
int	compareTo(java.lang.Object o)
int	evaluate(double[] input) Evaluates an input example (array of doubles as extracted from KEEL API)
int	getClas() Gets the class of this rule
int	getNumGenes() Gets the number of genes of this chromosome
boolean	isEvaluated() Gets the evaluation status
void	mutate() Applies a mutation on this chromosome, adding a gene (0.5 prob) or deleting one gene (0.5 prob or if this chromosome has genes for all the attributes)
void	mutateGene(int gen) Applies a random mutation of the specified gene
void	removeGene(Gene gene) Remove a specific gene from the chromosome, using the Object.equals() method (must be the SAME object with SAME id)
void	removeGene(int index) Deletes one gene from the chromosome
void	resetTokens() Reset the count of captured tokens for this rule in the tokens competition
boolean	same(Chromosome c) Test if two chromosomes are equals by comparing their values
void	setClass(int c) Sets the class of this chromosome
void	setEvaluated(boolean ev) Set this chromosome as evaluated (fitness computed for the current set of genes) or not
void	setFitness(double fit) Sets the fitness for this rule
void	swap(Chromosome c, int cutpoint) Performs the one-point crossover with other chromosome
void	tokenCaptured() Increases the amount of captured tokens by 1
void	tokenLost() Decreases the amount of captured tokens by 1

Methods inherited from class java.lang.Object

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

Constructor Detail

Chromosome

public Chromosome()

Default constructor. No memory allocated.

Chromosome

public Chromosome(Chromosome c)

Deep-copy constructor.

Parameters:

c - original chromosome

Method Detail

addNominalGene

public void addNominalGene(int pos,
                           Attribute a,
                           int relation,
                           java.util.ArrayList<java.lang.String> values)

Adds a nominal gene to this chromosome (rule)

Parameters:

pos - Position in which we put the gene

a - the attribute related to this gene (nominal!)

relation - the type of the relation which implements the gene (see Gene.java)

values - the nominal values that covers this gene

addRealGene

public void addRealGene(int pos,
                        Attribute a,
                        int relation,
                        double value)

Adds a real valued gene

Parameters:

pos - Position in which we put the gene

a - the attribute related to this gene (real or integer!)

relation - the type of the relation which implements the gene (see Gene.java)

value - the real values that covers this gene

addRealBoundedGene

public void addRealBoundedGene(int pos,
                               Attribute a,
                               int relation,
                               double[] value)

Adds a real-valued gene, and sets its bounds

Parameters:

pos - the position of the gene in the chromosome

a - the attribute related to this gene (real!)

relation - the type of relation (see Gene.java)

value - array of 2 positions, with the minimum bound (position [0]) and maximum bound (position [1])

removeGene

public void removeGene(int index)

Deletes one gene from the chromosome

Parameters:

index - position of the gene to be deleted

removeGene

public void removeGene(Gene gene)

Remove a specific gene from the chromosome, using the Object.equals() method (must be the SAME object with SAME id)

Parameters:

gene - gene object to be deleted from the chromosome

evaluate

public int evaluate(double[] input)

Evaluates an input example (array of doubles as extracted from KEEL API)

Parameters:

input - the input instance

Returns:

the class of this rule if covered, -1 otherwise

getNumGenes

public int getNumGenes()

Gets the number of genes of this chromosome

Returns:

the number of genes

mutateGene

public void mutateGene(int gen)

Applies a random mutation of the specified gene

Parameters:

gen - index of the gene to be mutated

mutate

public void mutate()

Applies a mutation on this chromosome, adding a gene (0.5 prob) or deleting one gene (0.5 prob or if this chromosome has genes for all the attributes)

setClass

public void setClass(int c)

Sets the class of this chromosome

Parameters:

c - the new consequent class

getClas

public int getClas()

Gets the class of this rule

Returns:

the consequent class

setEvaluated

public void setEvaluated(boolean ev)

Set this chromosome as evaluated (fitness computed for the current set of genes) or not

Parameters:

ev - the new evaluation status

isEvaluated

public boolean isEvaluated()

Gets the evaluation status

Returns:

True if the fitness is correct for this gene set, false otherwise

setFitness

public void setFitness(double fit)

Sets the fitness for this rule

Parameters:

fit - the new fitness

resetTokens

public void resetTokens()

Reset the count of captured tokens for this rule in the tokens competition

tokenCaptured

public void tokenCaptured()

Increases the amount of captured tokens by 1

tokenLost

public void tokenLost()

Decreases the amount of captured tokens by 1

swap

public void swap(Chromosome c,
                 int cutpoint)

Performs the one-point crossover with other chromosome

Parameters:

c - the chrosomome to be crossed with

cutpoint - the cutpoint of this swapping operation

compareTo

public int compareTo(java.lang.Object o)

Specified by:

compareTo in interface java.lang.Comparable

same

public boolean same(Chromosome c)

Test if two chromosomes are equals by comparing their values

Parameters:

c - the chromosome to be compared with

Returns:

True if they are equals in values, false otherwise