keel.Algorithms.Genetic_Rule_Learning.XCS

Class WilsonReduction

java.lang.Object

keel.Algorithms.Genetic_Rule_Learning.XCS.WilsonReduction

All Implemented Interfaces:

Reduction

public class WilsonReduction
extends java.lang.Object
implements Reduction

This class implements the reduction Interface. It codifies an strict version of the wilson reduction proposed in Wilson 2002.

Since:

JDK1.2

Version:

1.1

Author:

Written by Albert Orriols (La Salle, Ramón Llull University - Barcelona) 28/03/2004, Modified by Xavi Solé (La Salle, Ramón Llull University - Barcelona) 03/12/2008

Constructor Summary

Constructors

Constructor and Description
WilsonReduction() Creates one WilsonReduction Object.

Method Summary

Modifier and Type	Method and Description
Population	makeReduction(Population pop, Environment reductionEnv) Compacts the ruleSet of the population.

Methods inherited from class java.lang.Object

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

Constructor Detail

WilsonReduction

public WilsonReduction()

Creates one WilsonReduction Object.

Method Detail

makeReduction

public Population makeReduction(Population pop,
                                Environment reductionEnv)

Compacts the ruleSet of the population. Before doing that, it writes all the classifiers in a file. Then it compacts the classifiers following the method described in Wilson's 2002 article. After all, it writes the new ruleset into a file, with the same name and .cmp (compacted) extension. It does not destroy the environment. It does modify the population (it returns the population sorted).

Specified by:

makeReduction in interface Reduction

Parameters:

pop - is the population that has to be reduced.

reductionEnv - is the environment that will be used to get the performance of classifiers.

Returns:

a Population with the reduced population. So, the initial population is not modified.