edu.udo.cs.yale.tools.math.optimization.ec.es
Class Population

java.lang.Object
  edu.udo.cs.yale.tools.math.optimization.ec.es.Population

public class Population
extends java.lang.Object

A set of individuals. Each individual contains the values vector and information about its fitness.

Version:

$Id: Population.java,v 1.2 2006/08/25 23:38:52 ingomierswa Exp $

Author:

Ingo Mierswa

Field Summary

private Individual	bestEver All generations' best individual.
private Individual	currentBest The currently best individual.
private int	generations The number of generations.
private java.util.ArrayList<Individual>	individuals List of individuals.
private int	lastImprovement The last generation where setBestEver() was invoked.
static java.util.Comparator<Individual>	PERFORMANCE_COMPARATOR

Constructor Summary

Population()

Method Summary

void	add(Individual individual) Adds a single individual.
void	addAll(java.util.Collection<Individual> newIndividuals) Adds all individuals from the given collection.
void	clear() Removes all individuals.
Individual	get(int i) Returns a single individual.
Individual	getBestEver()
Individual	getCurrentBest()
int	getGeneration()
int	getGenerationsWithoutImprovement()
int	getNumberOfIndividuals() Returns the number of all individuals.
void	nextGeneration()
void	remove(Individual individual) Removes a single individual.
void	remove(int i) Removes a single individual.
void	setBestEver(Individual bestEver)
void	setCurrentBest(Individual currentBest)
void	sort() Sorts the individuals in ascending order according to their performance, thus the best one will be in last position.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

PERFORMANCE_COMPARATOR

public static final java.util.Comparator<Individual> PERFORMANCE_COMPARATOR

individuals

private java.util.ArrayList<Individual> individuals

List of individuals.

bestEver

private Individual bestEver

All generations' best individual.

currentBest

private Individual currentBest

The currently best individual.

generations

private int generations

The number of generations.

lastImprovement

private int lastImprovement

The last generation where setBestEver() was invoked.

Constructor Detail

Population

public Population()

Method Detail

clear

public void clear()

Removes all individuals.

add

public void add(Individual individual)

Adds a single individual.

addAll

public void addAll(java.util.Collection<Individual> newIndividuals)

Adds all individuals from the given collection.

remove

public void remove(Individual individual)

Removes a single individual.

remove

public void remove(int i)

Removes a single individual.

get

public Individual get(int i)

Returns a single individual.

getNumberOfIndividuals

public int getNumberOfIndividuals()

Returns the number of all individuals.

setCurrentBest

public void setCurrentBest(Individual currentBest)

getCurrentBest

public Individual getCurrentBest()

setBestEver

public void setBestEver(Individual bestEver)

getBestEver

public Individual getBestEver()

nextGeneration

public void nextGeneration()

getGeneration

public int getGeneration()

getGenerationsWithoutImprovement

public int getGenerationsWithoutImprovement()

sort

public void sort()

Sorts the individuals in ascending order according to their performance, thus the best one will be in last position.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object