Package org.moeaframework.core.selection

Class DifferentialEvolutionSelection

java.lang.Object

org.moeaframework.core.selection.DifferentialEvolutionSelection

All Implemented Interfaces:

Selection

public class DifferentialEvolutionSelection
extends Object
implements Selection

Selection operator to be used in conjunction with the DifferentialEvolutionVariation operator. The select method returns the solutions [currentIndex, r1, r2, ...], where currentIndex is set using the setCurrentIndex(int) method and r1, r2, ... are randomly selected solutions. The returned solutions are guaranteed to have unique indices in the population, but the solutions themselves may not be unique if the population contains duplicate solutions.

Constructor Summary

Constructors

Constructor	Description
DifferentialEvolutionSelection()	Constructs a differential evolution selection operator.

Method Summary

Modifier and Type	Method	Description
Solution[]	select(int arity, Population population)	Returns an array of length arity of solutions selected from the specified population.
void	setCurrentIndex(int currentIndex)	Sets the current index, which is the index of the first solution returned by the select method.

Methods inherited from class java.lang.Object

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

Constructor Details

DifferentialEvolutionSelection

public DifferentialEvolutionSelection()

Constructs a differential evolution selection operator.

Method Details

setCurrentIndex

public void setCurrentIndex(int currentIndex)

Sets the current index, which is the index of the first solution returned by the select method. If set to -1, then the current index is randomly assigned each time select(int, Population) is invoked.

Parameters:

currentIndex - the current index

select

public Solution[] select(int arity,
 Population population)

Description copied from interface: Selection

Returns an array of length arity of solutions selected from the specified population.

Specified by:

select in interface Selection

Parameters:

arity - the number of solutions selected from the specified population

population - the population from which solutions are selected

Returns:

an array of length arity of solutions selected from the specified population