Changeset 3700

Timestamp:

05/07/10 14:33:49 (14 years ago)

Author:

abeham

Message:

#839

• added parameter selected parents to Island OSGA

File:

• trunk/sources/HeuristicLab.Algorithms.OffspringSelectionGeneticAlgorithm/3.3/IslandOffspringSelectionGeneticAlgorithm.cs (modified) (3 diffs)

trunk/sources/HeuristicLab.Algorithms.OffspringSelectionGeneticAlgorithm/3.3/IslandOffspringSelectionGeneticAlgorithm.cs

@@ -120 +120 @@
     private ValueLookupParameter<BoolValue> OffspringSelectionBeforeMutationParameter {
       get { return (ValueLookupParameter<BoolValue>)Parameters["OffspringSelectionBeforeMutation"]; }
+    }
+    private ValueLookupParameter<IntValue> SelectedParentsParameter {
+      get { return (ValueLookupParameter<IntValue>)Parameters["SelectedParents"]; }
     }
     private ValueParameter<MultiAnalyzer> AnalyzerParameter {
@@ -274 +277 @@
       Parameters.Add(new ValueLookupParameter<DoubleValue>("MaximumSelectionPressure", "The maximum selection pressure that terminates the algorithm.", new DoubleValue(100)));
       Parameters.Add(new ValueLookupParameter<BoolValue>("OffspringSelectionBeforeMutation", "True if the offspring selection step should be applied before mutation, false if it should be applied after mutation.", new BoolValue(false)));
+      Parameters.Add(new ValueLookupParameter<IntValue>("SelectedParents", "Should be about 2 * PopulationSize, for large problems use a smaller value to decrease memory footprint.", new IntValue(200)));
       Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze the islands.", new MultiAnalyzer()));
       Parameters.Add(new ValueParameter<MultiAnalyzer>("IslandAnalyzer", "The operator used to analyze each island.", new MultiAnalyzer()));
@@ -482 +486 @@
       foreach (ISelector selector in SelectorParameter.ValidValues) {
         selector.CopySelected = new BoolValue(true);
-        selector.NumberOfSelectedSubScopesParameter.Value = new IntValue(2 * (PopulationSize.Value - Elites.Value));
+        selector.NumberOfSelectedSubScopesParameter.Value = null;
+        selector.NumberOfSelectedSubScopesParameter.ActualName = SelectedParentsParameter.Name;
         ParameterizeStochasticOperator(selector);
       }