keel.Algorithms.Preprocess.Feature_Selection.evolutionary_algorithms

Class Cromosoma

java.lang.Object

keel.Algorithms.Preprocess.Feature_Selection.evolutionary_algorithms.Cromosoma

Direct Known Subclasses:

CromosomaBinario, CromosomaEntero

public abstract class Cromosoma
extends java.lang.Object

Abstract class Chromosome that defines a generalization of CromosomaBinario & CromosomaEntero

Author:

Manuel Chica Serrano

Field Summary

Fields

Modifier and Type	Field and Description
protected double	fitness chromosome fitness
protected int[]	rep this vector represents a chromosome
protected int	tamCromosoma chromosome length

Constructor Summary

Constructors

Constructor and Description
Cromosoma(int tam) Creates a new instance of Cromosoma

Method Summary

Modifier and Type	Method and Description
abstract void	cambiarGen(int nuevoValorGen, int posGen) modifies the ith value of a gene
void	copy(Cromosoma cr) it copies all gens of the cr chromosome
abstract void	cruzar(Cromosoma padre2, Cromosoma hijo1, Cromosoma hijo2) crossover operator.
abstract boolean	cruzarHUX(Cromosoma padre2, Cromosoma hijo1, Cromosoma hijo2, int umbral) uniform crossover operator (HUX) If parents are very similar, the crossover operator doesn't apply
abstract boolean[]	devolverFeaturesVector() returns a boolean array needed for Leaving One Out, Cross Validation and other methods used in Feature Selection Algorithm
abstract int	devolverGen(int i) return the ith gen of chromosome
int	devolverTamCromosoma() return the length of the chromosome
double	getFitness() return the fitness of the chromosome
abstract void	initPlantilla(Cromosoma crPlantilla, double ratio) this method is used in CHC method.
abstract void	initRand() random initialization of a chromosome
boolean	isEqual(Cromosoma cr) this boolean method return true if two chromosomes are equal in all of its genes
abstract void	mutar() mutation operator
abstract java.lang.String	print() it prints a chromosome, gene by gene.
void	setFitness(double calidad) set the fitness for the chromosome

Methods inherited from class java.lang.Object

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

Field Detail

tamCromosoma

protected int tamCromosoma

chromosome length

rep

protected int[] rep

this vector represents a chromosome

fitness

protected double fitness

chromosome fitness

Constructor Detail

Cromosoma

public Cromosoma(int tam)

Creates a new instance of Cromosoma

Parameters:

tam - is the chromosome length

Method Detail

initRand

public abstract void initRand()

random initialization of a chromosome

initPlantilla

public abstract void initPlantilla(Cromosoma crPlantilla,
                                   double ratio)

this method is used in CHC method. initializes a chromosome using a chromosome template and a random initialization

Parameters:

crPlantilla - is a chromosome template

ratio - is the ratio of random initialization

devolverGen

public abstract int devolverGen(int i)

return the ith gen of chromosome

Parameters:

i - is the ith position

Returns:

integer with gene value

cambiarGen

public abstract void cambiarGen(int nuevoValorGen,
                                int posGen)

modifies the ith value of a gene

Parameters:

nuevoValorGen - the new value for the gene

posGen - the position what we want to change (0..tamCromsoma-1)

cruzar

public abstract void cruzar(Cromosoma padre2,
                            Cromosoma hijo1,
                            Cromosoma hijo2)

crossover operator. The offsprings must be created before calling method

Parameters:

padre2 - is a parent

hijo1 - is the first offspring

hijo2 - is the second offspring

cruzarHUX

public abstract boolean cruzarHUX(Cromosoma padre2,
                                  Cromosoma hijo1,
                                  Cromosoma hijo2,
                                  int umbral)

uniform crossover operator (HUX) If parents are very similar, the crossover operator doesn't apply

Parameters:

padre2 - is a parent

hijo1 - is the first offspring

hijo2 - is the second offspring

umbral - is the threshold, needed by the operator

Returns:

return true is the crossover operator was succesful, false in other case

mutar

public abstract void mutar()

mutation operator

print

public abstract java.lang.String print()

it prints a chromosome, gene by gene.

Returns:

String representation of the chromosome.

devolverFeaturesVector

public abstract boolean[] devolverFeaturesVector()

returns a boolean array needed for Leaving One Out, Cross Validation and other methods used in Feature Selection Algorithm

Returns:

a boolean array with the selected features

setFitness

public void setFitness(double calidad)

set the fitness for the chromosome

Parameters:

calidad - this is the fitness to be applied

getFitness

public double getFitness()

return the fitness of the chromosome

Returns:

calidad this is the fitness of the chromosome

devolverTamCromosoma

public int devolverTamCromosoma()

return the length of the chromosome

Returns:

the length of the chromosome

isEqual

public boolean isEqual(Cromosoma cr)

this boolean method return true if two chromosomes are equal in all of its genes

Parameters:

cr - is the other chromosome to compare

Returns:

true if two chromosomes are equal in all of their genes

copy

public void copy(Cromosoma cr)

it copies all gens of the cr chromosome

Parameters:

cr - is the chromosome that will be copied