Package org.moeaframework.util.weights

Class RandomGenerator

java.lang.Object
org.moeaframework.util.weights.RandomGenerator
All Implemented Interfaces:
WeightGenerator
public class RandomGenerator extends Object implements WeightGenerator
Generates weights randomly. This is the method proposed in [1] to replace the normal boundary intersection method in the original MOEA/D. If N weights are requested, this method first generates 50*N random weights. From these weights, N are selected that are maximally distant from all other weights.

References:

  1. Zhang, Q., et al. "The Performance of a New Version of MOEA/D on CEC09 Unconstrained MOP Test Instances." IEEE Congress on Evolutionary Computation, 2009.

  • Constructor Summary

    Constructors
    Constructor
    Description
    RandomGenerator(int numberOfObjectives, int numberOfPoints)
    Constructs a new weight generator that generates randomly-sampled weights.

  • Method Summary

    Modifier and Type
    Method
    Description
    List<double[]>
    generate()
    Returns the generated weights.
    int
    size()
    Returns the number of weights that will be generated.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • RandomGenerator

      public RandomGenerator(int numberOfObjectives, int numberOfPoints)
      Constructs a new weight generator that generates randomly-sampled weights.
      Parameters:
      numberOfObjectives - the number of objectives
      numberOfPoints - the number of weights to generate

  • Method Details

    • size

      public int size()
      Description copied from interface: WeightGenerator
      Returns the number of weights that will be generated.
      Specified by:
      size in interface WeightGenerator
      Returns:
      the number of weights that will be generated

    • generate

      public List<double[]> generate()
      Description copied from interface: WeightGenerator
      Returns the generated weights.
      Specified by:
      generate in interface WeightGenerator
      Returns:
      the generated weights