Package io.jenetics.ext.moea
Class NSGA2Selector<G extends Gene<?,G>,C extends Comparable<? super C>>
- java.lang.Object
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- io.jenetics.ext.moea.NSGA2Selector<G,C>
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- All Implemented Interfaces:
Selector<G,C>
public class NSGA2Selector<G extends Gene<?,G>,C extends Comparable<? super C>> extends Object implements Selector<G,C>
This selector selects the firstcount
elements of the population, which has been sorted by the Crowded-Comparison Operator, as described in A Fast and Elitist Multiobjective Genetic Algorithm: NSGA-IIReference: K. Deb, A. Pratap, S. Agarwal, and T. Meyarivan. 2002. A fast and elitist multiobjective genetic algorithm: NSGA-II. Trans. Evol. Comp 6, 2 (April 2002), 182-197. DOI= 10.1109/4235.996017
- Since:
- 4.1
- Version:
- 4.1
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Constructor Summary
Constructors Constructor Description NSGA2Selector(Comparator<? super C> dominance, ElementComparator<? super C> comparator, ElementDistance<? super C> distance, ToIntFunction<? super C> dimension)
Creates a newNSGA2Selector
with the functions needed for handling the multi-objective result typeC
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static <G extends Gene<?,G>,T,V extends Vec<T>>
NSGA2Selector<G,V>ofVec()
Return a new selector for the given result typeV
.ISeq<Phenotype<G,C>>
select(Seq<Phenotype<G,C>> population, int count, Optimize opt)
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Constructor Detail
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NSGA2Selector
public NSGA2Selector(Comparator<? super C> dominance, ElementComparator<? super C> comparator, ElementDistance<? super C> distance, ToIntFunction<? super C> dimension)
Creates a newNSGA2Selector
with the functions needed for handling the multi-objective result typeC
. For theVec
classes, a selector is created like in the following example:new NSGA2Selector<>( Vec<T>::dominance, Vec<T>::compare, Vec<T>::distance, Vec<T>::length );
- Parameters:
dominance
- the pareto dominance comparatorcomparator
- the vector element comparatordistance
- the vector element distancedimension
- the dimensionality of vector typeC
- See Also:
ofVec()
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Method Detail
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select
public ISeq<Phenotype<G,C>> select(Seq<Phenotype<G,C>> population, int count, Optimize opt)
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ofVec
public static <G extends Gene<?,G>,T,V extends Vec<T>> NSGA2Selector<G,V> ofVec()
Return a new selector for the given result typeV
. This method is a shortcut fornew NSGA2Selector<>( Vec<T>::dominance, Vec<T>::compare, Vec<T>::distance, Vec<T>::length );
- Type Parameters:
G
- the gene typeT
- the array type, e.g.double[]
V
- the multi object result type vector- Returns:
- a new selector for the given result type
V
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