sdt.ga
Class Population

java.lang.Object
  |
  +--sdt.ga.Population

public class Population

extends java.lang.Object

implements java.io.Serializable

Provides a representation of a population in a particular genertion. The population consists of a number of organisms.

See Also:

Serialized Form

Field Summary

Population	old
Organism[]	storage

Constructor Summary

Population(GeneticAlgorithm ga, boolean instantiate_organisms)
Creates an instance of population with organisms instatiated depending on the specification

Method Summary

protected void	applyMGAOps(Organism incumbent) Implements the MGA operations.
void	crossover() Implements the recombination by crossing over successive organisms.
Fitness	getAvgFitness()
Organism	getFittestOrganism() Returns the fittest organism in the current population.
Organism	getRandomOrganism()
int	getRandomPosition(int length)
void	mutate() Implements the mutation operator
void	populateWith(Population old) Implements the tournament selection of organisms in the present population from the old population.
void	populateWith(Population old, Organism incumbent, Organism[] MGA) Tournament Selection operation when MGA solutions are required.
void	randomize() Randomizes the population by randomizing each constituting organism.
void	setGA(GeneticAlgorithm ga)
java.lang.String	toString()
protected Organism[]	updateMGA(Organism[] MGA, Organism incumbent) updates the MGA solution set if better solutions are found.

Methods inherited from class java.lang.Object

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

Field Detail

storage

public Organism[] storage

old

public Population old

Constructor Detail

Population

public Population(GeneticAlgorithm ga,
                  boolean instantiate_organisms)

Creates an instance of population with organisms instatiated depending on the specification

Method Detail

randomize

public void randomize()

Randomizes the population by randomizing each constituting organism.

populateWith

public void populateWith(Population old)

Implements the tournament selection of organisms in the present population from the old population.

populateWith

public void populateWith(Population old,
                         Organism incumbent,
                         Organism[] MGA)

Tournament Selection operation when MGA solutions are required.

applyMGAOps

protected void applyMGAOps(Organism incumbent)

Implements the MGA operations.

updateMGA

protected Organism[] updateMGA(Organism[] MGA,
                               Organism incumbent)

updates the MGA solution set if better solutions are found.

crossover

public void crossover()

Implements the recombination by crossing over successive organisms.

mutate

public void mutate()

Implements the mutation operator

getRandomOrganism

public Organism getRandomOrganism()

getFittestOrganism

public Organism getFittestOrganism()

Returns the fittest organism in the current population.

getAvgFitness

public Fitness getAvgFitness()

setGA

public void setGA(GeneticAlgorithm ga)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getRandomPosition

public int getRandomPosition(int length)