jaga.evolve
Class RankSelector

java.lang.Object
  |
  +--jaga.evolve.RankSelector

All Implemented Interfaces:

Selector, java.io.Serializable

public class RankSelector

extends java.lang.Object

implements Selector

A Rank selector. Must be used with fixed size populations.

See Also:

Serialized Form

Constructor Summary

RankSelector()
Creates new RankSelector where the rank table will be so that the worst individual gets 0 chance of selection and the highest gets the double of the median.

RankSelector(double[] rankTable)
Creates new RankSelector using custom rankTable.

Method Summary

void	refresh() can be used to refresh the internal state in the case for example that the population changed.
Genotype	select(Population pop) Picks a genotype from the population through some selection process.
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RankSelector

public RankSelector()

Creates new RankSelector where the rank table will be so that the worst individual gets 0 chance of selection and the highest gets the double of the median.

RankSelector

public RankSelector(double[] rankTable)

Creates new RankSelector using custom rankTable. If the table is too short, unmentioned elements won't be reproduced. First element refers to fittest and so forth in descending order.

Method Detail

select

public Genotype select(Population pop)

Picks a genotype from the population through some selection process.

Specified by:

select in interface Selector

refresh

public void refresh()

can be used to refresh the internal state in the case for example that the population changed. This allows a selector to be optimized for a certain population by keeping state of it from one call to another In this case: 1. Sorts the population into ascending order. 2. Creates the rank table if needed.

Specified by:

refresh in interface Selector

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object