Package org.opt4j.optimizer.ea

Class AlternativeNsga2

java.lang.Object

org.opt4j.optimizer.ea.AlternativeNsga2

All Implemented Interfaces:

Selector

Direct Known Subclasses:

ScalingNsga2

public class AlternativeNsga2
extends Object
implements Selector

Deprecated.

Previous implementation as of Opt4J version 2.2. and Qais extensions, which is still used as the basis for ScalingNsga2. TODO: delete this and base ScalingNsga2 on Nsga2.

The Nsga2 Selector.

See Also:

Nsga2Module, "A Fast Elitist Non-Dominated Sorting Genetic Algorithm for Multi-Objective Optimization: NSGA-II, K. Deb, Samir Agrawal, Amrit Pratap, and T. Meyarivan, Parallel Problem Solving from Nature, 2000"

Field Summary

Fields

Modifier and Type	Field	Description
protected double[]	dist	Deprecated.
protected List<List<Integer>>	fronts	Deprecated.
protected Individual[]	ind	Deprecated.
protected Integer	m	Deprecated.
protected Map<Individual,Integer>	map	Deprecated.
protected Random	random	Deprecated.
protected int[]	rank	Deprecated.
protected int	tournament	Deprecated.

Constructor Summary

Constructors

Constructor	Description
AlternativeNsga2(Rand random, int tournament)	Deprecated. Constructs a Nsga2 Selector.

Method Summary

Modifier and Type	Method	Description
protected void	calcDistance(List<Integer> list)	Deprecated.
List<List<Integer>>	fronts()	Deprecated. Evaluate the fronts and set the correspondent rank values.
Collection<Individual>	getLames(int n, Collection<Individual> population)	Deprecated. Selects a subset of lambda Individuals and returns it as a new Collection.
Collection<Individual>	getParents(int mu, Collection<Individual> population)	Deprecated. Selects a subset of Individuals and returns it as a new Collection.
void	init(int maxsize)	Deprecated. Sets the maximal number of Individuals.
protected boolean	synchronize(Collection<Individual> population)	Deprecated.

Methods inherited from class java.lang.Object

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

Field Detail

random

protected final Random random

Deprecated.

tournament

protected final int tournament

Deprecated.

map

protected final Map<Individual,Integer> map

Deprecated.

ind

protected Individual[] ind

Deprecated.

rank

protected int[] rank

Deprecated.

dist

protected double[] dist

Deprecated.

m

protected Integer m

Deprecated.

fronts

protected List<List<Integer>> fronts

Deprecated.

Constructor Detail

AlternativeNsga2

@Inject
public AlternativeNsga2(Rand random,
                        int tournament)

Deprecated.

Constructs a Nsga2 Selector.

Parameters:

random - the random number generator

tournament - the tournament value

Method Detail

init

public void init(int maxsize)

Deprecated.

Description copied from interface: Selector

Sets the maximal number of Individuals.

Specified by:

init in interface Selector

Parameters:

maxsize - the number of individuals

getParents

public Collection<Individual> getParents(int mu,
                                         Collection<Individual> population)

Deprecated.

Description copied from interface: Selector

Selects a subset of Individuals and returns it as a new Collection. These so called parents can be used to form the next generation.

Specified by:

getParents in interface Selector

Parameters:

mu - the number of parents to select

population - the list of individuals

Returns:

the parents

getLames

public Collection<Individual> getLames(int n,
                                       Collection<Individual> population)

Deprecated.

Description copied from interface: Selector

Selects a subset of lambda Individuals and returns it as a new Collection. These individuals can be erased in the next generation.

Specified by:

getLames in interface Selector

Parameters:

n - the number of lames to select

population - the list of individuals

Returns:

the worst lambda individuals

fronts

public List<List<Integer>> fronts()

Deprecated.

Evaluate the fronts and set the correspondent rank values.

Returns:

the fronts

calcDistance

protected void calcDistance(List<Integer> list)

Deprecated.

synchronize

protected boolean synchronize(Collection<Individual> population)

Deprecated.