Changeset 18082 for branches/3040_VectorBasedGP/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/MultiSymbolicExpressionTreeManipulator.cs

Timestamp:

11/15/21 16:18:39 (2 years ago)

Author:

pfleck

Message:

#3040: Added the ISymbolicDataAnalysisExpressionManipulator and necessary code analogously to the ISymbolicDataAnalysisExpressionCrossover.

File:

• branches/3040_VectorBasedGP/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/MultiSymbolicExpressionTreeManipulator.cs (modified) (2 diffs)

branches/3040_VectorBasedGP/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/MultiSymbolicExpressionTreeManipulator.cs

@@ -81 +81 @@
       CheckedItemList<ISymbolicExpressionTreeManipulator> checkedItemList = new CheckedItemList<ISymbolicExpressionTreeManipulator>();
       checkedItemList.AddRange(list.OrderBy(op => op.Name));
-      Operators = checkedItemList.AsReadOnly();
+      //Operators = checkedItemList.AsReadOnly();
+      Operators = checkedItemList;
       Operators_ItemsAdded(this, new CollectionItemsChangedEventArgs<IndexedItem<ISymbolicExpressionTreeManipulator>>(Operators.CheckedItems));
 
@@ -89 +90 @@
     public override IDeepCloneable Clone(Cloner cloner) {
       return new MultiSymbolicExpressionTreeManipulator(this, cloner);
+    }
+
+    public void Manipulate(IRandom random, ISymbolicExpressionTree symbolicExpressionTree) {
+      double sum = Operators.CheckedItems.Sum(o => Probabilities[o.Index]);
+      if (sum.IsAlmost(0)) throw new InvalidOperationException(Name + ": All selected operators have zero probability.");
+      double r = random.NextDouble() * sum;
+      sum = 0;
+      int index = -1;
+      foreach (var indexedItem in Operators.CheckedItems) {
+        sum += Probabilities[indexedItem.Index];
+        if (sum > r) {
+          index = indexedItem.Index;
+          break;
+        }
+      }
+      Operators[index].Manipulate(random, symbolicExpressionTree);
     }