Changeset 4514 for branches/NSGA2/HeuristicLab.Algorithms.NSGA2/3.3/NSGA2.cs

Timestamp:

09/27/10 10:40:51 (14 years ago)

Author:

abeham

Message:

#1040

• Added SelectedParents parameter to define the size of the offspring population

File:

• branches/NSGA2/HeuristicLab.Algorithms.NSGA2/3.3/NSGA2.cs (modified) (6 diffs)

branches/NSGA2/HeuristicLab.Algorithms.NSGA2/3.3/NSGA2.cs

@@ -82 +82 @@
       get { return (ValueParameter<IntValue>)Parameters["MaximumGenerations"]; }
     }
+    private ValueParameter<IntValue> SelectedParentsParameter {
+      get { return (ValueParameter<IntValue>)Parameters["SelectedParents"]; }
+    }
     #endregion
 
@@ -124 +127 @@
       get { return MaximumGenerationsParameter.Value; }
       set { MaximumGenerationsParameter.Value = value; }
+    }
+    public IntValue SelectedParents {
+      get { return SelectedParentsParameter.Value; }
+      set { SelectedParentsParameter.Value = value; }
     }
     private RandomCreator RandomCreator {
@@ -155 +162 @@
       Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze each generation.", new MultiAnalyzer()));
       Parameters.Add(new ValueParameter<IntValue>("MaximumGenerations", "The maximum number of generations which should be processed.", new IntValue(1000)));
+      Parameters.Add(new ValueParameter<IntValue>("SelectedParents", "Each two parents form a new child, typically this value should be twice the population size, but because the NSGA-II is maximally elitist it can be any multiple of 2 greater than 0.", new IntValue(200)));
 
       RandomCreator randomCreator = new RandomCreator();
@@ -268 +276 @@
       ParameterizeAnalyzers();
     }
+    private void SelectedParentsParameter_ValueChanged(object sender, EventArgs e) {
+      SelectedParents.ValueChanged += new EventHandler(SelectedParents_ValueChanged);
+      SelectedParents_ValueChanged(null, EventArgs.Empty);
+    }
+    private void SelectedParents_ValueChanged(object sender, EventArgs e) {
+      if (SelectedParents.Value < 2) SelectedParents.Value = 2;
+      else if (SelectedParents.Value % 2 != 0) {
+        SelectedParents.Value = SelectedParents.Value + 1;
+      }
+    }
     #endregion
 
@@ -275 +293 @@
       PopulationSizeParameter.ValueChanged += new EventHandler(PopulationSizeParameter_ValueChanged);
       PopulationSize.ValueChanged += new EventHandler(PopulationSize_ValueChanged);
+      SelectedParentsParameter.ValueChanged += new EventHandler(SelectedParentsParameter_ValueChanged);
+      SelectedParents.ValueChanged += new EventHandler(SelectedParents_ValueChanged);
       if (Problem != null) {
         Problem.Evaluator.QualitiesParameter.ActualNameChanged += new EventHandler(Evaluator_QualitiesParameter_ActualNameChanged);
@@ -299 +319 @@
       foreach (ISelector selector in SelectorParameter.ValidValues) {
         selector.CopySelected = new BoolValue(true);
-        selector.NumberOfSelectedSubScopesParameter.Value = new IntValue(2 * PopulationSizeParameter.Value.Value);
+        selector.NumberOfSelectedSubScopesParameter.ActualName = SelectedParentsParameter.Name;
         ParameterizeStochasticOperator(selector);
       }