org.biojavax.ga.functions
Class ProportionalSelection

java.lang.Object
  org.biojavax.ga.functions.ProportionalSelection

All Implemented Interfaces:

SelectionFunction

public class ProportionalSelection
extends java.lang.Object
implements SelectionFunction

A Selection function that determines the proportion of individuals in a new population proportionally to their fitness. The population size is not allowed to grow. Individuals are randomly selected for replication, those with greater fitness tend to replicate more often.

Version:

1.1

Author:

Mark Schreiber, Susanne Merz, Andreas Dräger

Nested Class Summary

Nested classes/interfaces inherited from interface org.biojavax.ga.functions.SelectionFunction

SelectionFunction.SelectAll, SelectionFunction.Threshold

Field Summary

Fields inherited from interface org.biojavax.ga.functions.SelectionFunction

DEFAULT

Constructor Summary

ProportionalSelection()

Method Summary

Population

select(Population pop, GeneticAlgorithm genAlg) Selects a Population of Organisms for replication based on their fitness.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProportionalSelection

public ProportionalSelection()

Method Detail

select

public Population select(Population pop,
                         GeneticAlgorithm genAlg)
                  throws ChangeVetoException

Description copied from interface: SelectionFunction

Selects a Population of Organisms for replication based on their fitness.

Specified by:

select in interface SelectionFunction

Parameters:

pop - the Population to select from.

genAlg - the parent GeneticAlgorithm.

Returns:

the Organisms selected

Throws:

ChangeVetoException - if the function attempts to change the population and it is vetoed.