Package ec.parsimony

Class DoubleTournamentSelection

java.lang.Object
ec.BreedingSource
ec.SelectionMethod
ec.parsimony.DoubleTournamentSelection
All Implemented Interfaces:
Prototype, Setup, SteadyStateBSourceForm, RandomChoiceChooserD, Serializable, Cloneable
public class DoubleTournamentSelection extends SelectionMethod implements SteadyStateBSourceForm
See Also:

  • Field Details

    • P_TOURNAMENT

      public static final String P_TOURNAMENT
      default base
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    • P_PICKWORST

      public static final String P_PICKWORST
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    • P_PICKWORST2

      public static final String P_PICKWORST2
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    • P_DOLENGTHFIRST

      public static final String P_DOLENGTHFIRST
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    • P_SIZE

      public static final String P_SIZE
      size parameter
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    • P_SIZE2

      public static final String P_SIZE2
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    • size

      public int size
      Size of the tournament

    • size2

      public int size2

    • probabilityOfSelection

      public double probabilityOfSelection
      What's our probability of selection? If 1.0, we always pick the "good" individual.

    • probabilityOfSelection2

      public double probabilityOfSelection2

    • pickWorst

      public boolean pickWorst
      Do we pick the worst instead of the best?

    • pickWorst2

      public boolean pickWorst2

    • doLengthFirst

      public boolean doLengthFirst

  • Constructor Details

    • DoubleTournamentSelection

      public DoubleTournamentSelection()

  • Method Details

    • defaultBase

      public Parameter defaultBase()
      Description copied from interface: Prototype
      Returns the default base for this prototype. This should generally be implemented by building off of the static base() method on the DefaultsForm object for the prototype's package. This should be callable during setup(...).
      Specified by:
      defaultBase in interface Prototype

    • setup

      public void setup(EvolutionState state, Parameter base)
      Description copied from class: BreedingSource
      Sets up the BreedingPipeline. You can use state.output.error here because the top-level caller promises to call exitIfErrors() after calling setup. Note that probability might get modified again by an external source if it doesn't normalize right.

      The most common modification is to normalize it with some other set of probabilities, then set all of them up in increasing summation; this allows the use of the fast static BreedingSource-picking utility method, BreedingSource.pickRandom(...). In order to use this method, for example, if four breeding source probabilities are {0.3, 0.2, 0.1, 0.4}, then they should get normalized and summed by the outside owners as: {0.3, 0.5, 0.6, 1.0}.

      Specified by:
      setup in interface Prototype
      Specified by:
      setup in interface Setup
      Overrides:
      setup in class BreedingSource
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    • produce

      public int produce(int subpopulation, EvolutionState state, int thread)
      Produces the index of a person selected from among several by a tournament. The tournament's criteria is fitness of individuals if doLengthFirst is true, otherwise the size of the individuals.
      Specified by:
      produce in class SelectionMethod

    • make

      public int make(int subpopulation, EvolutionState state, int thread)
      Produces the index of a person selected from among several by a tournament. The tournament's criteria is size of individuals if doLengthFirst is true, otherwise the fitness of the individuals.

    • individualReplaced

      public void individualReplaced(SteadyStateEvolutionState state, int subpopulation, int thread, int individual)
      Description copied from interface: SteadyStateBSourceForm
      Called whenever an individual has been replaced by another in the population.
      Specified by:
      individualReplaced in interface SteadyStateBSourceForm

    • sourcesAreProperForm

      public void sourcesAreProperForm(SteadyStateEvolutionState state)
      Description copied from interface: SteadyStateBSourceForm
      Issue an error (not a fatal -- we guarantee that callers of this method will also call exitIfErrors) if any of your sources, or their sources, etc., are not of SteadyStateBSourceForm.
      Specified by:
      sourcesAreProperForm in interface SteadyStateBSourceForm