com.rapidminer.operator.features.construction
Class ExampleSetBasedPopulation

java.lang.Object
  com.rapidminer.operator.features.construction.ExampleSetBasedPopulation

public class ExampleSetBasedPopulation
extends java.lang.Object

A set of individuals. Stores generation number and best individuals.

Author:

Ingo Mierswa

Field Summary

static java.util.Comparator<ExampleSetBasedIndividual>

PERFORMANCE_COMPARATOR

Constructor Summary

ExampleSetBasedPopulation()
Construct an empty generation.

Method Summary

void	add(ExampleSetBasedIndividual individual) Adds a single individual.
void	addAllIndividuals(java.util.Collection<ExampleSetBasedIndividual> newIndividuals) Adds all individuals from the given collection.
void	clear() Removes all individuals.
boolean	empty() Returns true is the population contains no individuals.
ExampleSetBasedIndividual	get(int i) Returns a single individual.
ExampleSetBasedIndividual	getBestIndividualEver() Returns all generations' best individual.
PerformanceVector	getBestPerformanceEver() Returns the best performance.
ExampleSetBasedIndividual	getCurrentBest() Returns the last generation's best individual.
PerformanceVector	getCurrentBestPerformance() Returns the last generation's best performance.
int	getGeneration() Returns the current number of the generation.
int	getGenerationsWithoutImproval() Returns the number of generations without improval.
int	getNumberOfIndividuals() Returns the number of all individuals.
void	nextGeneration() Increase the generation number by one.
void	remove(ExampleSetBasedIndividual individual) Removes a single individual.
void	remove(int i) Removes a single individual.
void	sort() Sorts the individuals in ascending order according to their performance, thus the best one will be in last position.
java.lang.String	toString()
void	updateEvaluation() Remember the current generation's best individual and update the best individual.

Methods inherited from class java.lang.Object

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

Field Detail

PERFORMANCE_COMPARATOR

public static final java.util.Comparator<ExampleSetBasedIndividual> PERFORMANCE_COMPARATOR

Constructor Detail

ExampleSetBasedPopulation

public ExampleSetBasedPopulation()

Construct an empty generation.

Method Detail

clear

public void clear()

Removes all individuals.

add

public void add(ExampleSetBasedIndividual individual)

Adds a single individual.

addAllIndividuals

public void addAllIndividuals(java.util.Collection<ExampleSetBasedIndividual> newIndividuals)

Adds all individuals from the given collection.

remove

public void remove(ExampleSetBasedIndividual individual)

Removes a single individual.

remove

public void remove(int i)

Removes a single individual.

get

public ExampleSetBasedIndividual get(int i)

Returns a single individual.

getNumberOfIndividuals

public int getNumberOfIndividuals()

Returns the number of all individuals.

empty

public boolean empty()

Returns true is the population contains no individuals.

nextGeneration

public void nextGeneration()

Increase the generation number by one.

getGeneration

public int getGeneration()

Returns the current number of the generation.

getGenerationsWithoutImproval

public int getGenerationsWithoutImproval()

Returns the number of generations without improval.

updateEvaluation

public void updateEvaluation()

Remember the current generation's best individual and update the best individual.

getBestPerformanceEver

public PerformanceVector getBestPerformanceEver()

Returns the best performance.

getBestIndividualEver

public ExampleSetBasedIndividual getBestIndividualEver()

Returns all generations' best individual.

getCurrentBest

public ExampleSetBasedIndividual getCurrentBest()

Returns the last generation's best individual.

getCurrentBestPerformance

public PerformanceVector getCurrentBestPerformance()

Returns the last generation's best performance.

sort

public void sort()

Sorts the individuals in ascending order according to their performance, thus the best one will be in last position.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object