Changeset 10268 for branches/GrammaticalEvolution/HeuristicLab.Problems.GrammaticalEvolution/Symbolic

Timestamp:

12/22/13 13:12:22 (11 years ago)

Author:

gkronber

Message:

#2109 implemented a grammar especially for GE (the grammar is not configured correctly when used in a classic symbolic regression/classification problem).
To use this grammar in a classical symbolic expression problem, first set the grammar in a GEProblem and load the problem instance (this creates the necessary variable symbols).
After this the configured grammar can be dragged onto the grammar parameter of the classical problem.

Location:

branches/GrammaticalEvolution

Files:

• . (modified) (1 prop)
• HeuristicLab.Problems.GrammaticalEvolution/Symbolic/GESymbolicDataAnalysisProblem.cs (modified) (8 diffs)
• HeuristicLab.Problems.GrammaticalEvolution/Symbolic/GESymbolicExpressionGrammar.cs (added)
• HeuristicLab.Problems.GrammaticalEvolution/Symbolic/GESymbolicRegressionSingleObjectiveProblem.cs (modified) (2 diffs)
• HeuristicLab.Problems.GrammaticalEvolution/Symbolic/IGESymbolicDataAnalysisProblem.cs (modified) (2 diffs)

branches/GrammaticalEvolution/HeuristicLab.Problems.GrammaticalEvolution/Symbolic/GESymbolicDataAnalysisProblem.cs

@@ -84 +84 @@
       get { return (IValueParameter<T>)Parameters[ProblemDataParameterName]; }
     }
-    public IValueParameter<ISymbolicDataAnalysisGrammar> SymbolicExpressionTreeGrammarParameter {
-      get { return (IValueParameter<ISymbolicDataAnalysisGrammar>)Parameters[SymbolicExpressionTreeGrammarParameterName]; }
+    public IValueParameter<GESymbolicExpressionGrammar> SymbolicExpressionTreeGrammarParameter {
+      get { return (IValueParameter<GESymbolicExpressionGrammar>)Parameters[SymbolicExpressionTreeGrammarParameterName]; }
     }
     public IValueParameter<ISymbolicDataAnalysisExpressionTreeInterpreter> SymbolicExpressionTreeInterpreterParameter {
@@ -134 +134 @@
     }
 
-    public ISymbolicDataAnalysisGrammar SymbolicExpressionTreeGrammar {
+    public GESymbolicExpressionGrammar SymbolicExpressionTreeGrammar {
       get { return SymbolicExpressionTreeGrammarParameter.Value; }
       set { SymbolicExpressionTreeGrammarParameter.Value = value; }
@@ -174 +174 @@
     [StorableHook(HookType.AfterDeserialization)]
     private void AfterDeserialization() {
-      if (!Parameters.ContainsKey(ApplyLinearScalingParameterName)) {
-        Parameters.Add(new FixedValueParameter<BoolValue>(ApplyLinearScalingParameterName, ApplyLinearScalingParameterDescription, new BoolValue(false)));
-        ApplyLinearScalingParameter.Hidden = true;
-
-        //it is assumed that for all symbolic regression algorithms linear scaling was set to true
-        //there is no possibility to determine the previous value of the parameter as it was stored in the evaluator
-        if (GetType().Name.Contains("SymbolicRegression"))
-          ApplyLinearScaling.Value = true;
-      }
-
       RegisterEventHandlers();
     }
@@ -194 +184 @@
       : base(evaluator, solutionCreator) {
       Parameters.Add(new ValueParameter<T>(ProblemDataParameterName, ProblemDataParameterDescription, problemData));
-      Parameters.Add(new ValueParameter<ISymbolicDataAnalysisGrammar>(SymbolicExpressionTreeGrammarParameterName, SymbolicExpressionTreeGrammarParameterDescription));
+      Parameters.Add(new ValueParameter<GESymbolicExpressionGrammar>(SymbolicExpressionTreeGrammarParameterName, SymbolicExpressionTreeGrammarParameterDescription));
       Parameters.Add(new ValueParameter<ISymbolicDataAnalysisExpressionTreeInterpreter>(SymbolicExpressionTreeInterpreterParameterName, SymoblicExpressionTreeInterpreterParameterDescription));
       //Parameters.Add(new FixedValueParameter<IntValue>(MaximumSymbolicExpressionTreeDepthParameterName, MaximumSymbolicExpressionTreeDepthParameterDescription));
@@ -213 +203 @@
       ApplyLinearScalingParameter.Hidden = true;
 
-      SymbolicExpressionTreeGrammar = new TypeCoherentExpressionGrammar();
+      SymbolicExpressionTreeGrammar = new GESymbolicExpressionGrammar(problemData.AllowedInputVariables, problemData.AllowedInputVariables.Count() * 3);
       SymbolicExpressionTreeInterpreter = new SymbolicDataAnalysisExpressionTreeLinearInterpreter();
 
@@ -225 +215 @@
     }
 
+    private void DeregisterGrammarHandler() {
+      SymbolicExpressionTreeGrammarParameter.ValueChanged -= SymbolicExpressionTreeGrammarParameter_ValueChanged;
+    }
+    private void RegisterGrammarHandler() {
+      SymbolicExpressionTreeGrammarParameter.ValueChanged += SymbolicExpressionTreeGrammarParameter_ValueChanged;
+    }
+
     protected virtual void UpdateGrammar() {
-      //SymbolicExpressionTreeGrammar.MaximumFunctionArguments = MaximumFunctionArguments.Value;
-      //SymbolicExpressionTreeGrammar.MaximumFunctionDefinitions = MaximumFunctionDefinitions.Value;
-      foreach (var varSymbol in SymbolicExpressionTreeGrammar.Symbols.OfType<HeuristicLab.Problems.DataAnalysis.Symbolic.Variable>()) {
-        if (!varSymbol.Fixed) {
-          varSymbol.AllVariableNames = ProblemData.InputVariables.Select(x => x.Value);
-          varSymbol.VariableNames = ProblemData.AllowedInputVariables;
-        }
-      }
-      foreach (var varSymbol in SymbolicExpressionTreeGrammar.Symbols.OfType<HeuristicLab.Problems.DataAnalysis.Symbolic.VariableCondition>()) {
-        if (!varSymbol.Fixed) {
-          varSymbol.AllVariableNames = ProblemData.InputVariables.Select(x => x.Value);
-          varSymbol.VariableNames = ProblemData.AllowedInputVariables;
-        }
-      }
+      DeregisterGrammarHandler();
+      // create a new grammar instance with the correct allowed input variables
+      SymbolicExpressionTreeGrammarParameter.Value =
+        new GESymbolicExpressionGrammar(ProblemData.AllowedInputVariables, ProblemData.AllowedInputVariables.Count() * 3);
+      RegisterGrammarHandler();
     }
 
@@ -257 +245 @@
       ProblemDataParameter.Value.Changed += (object sender, EventArgs e) => OnProblemDataChanged();
 
-      SymbolicExpressionTreeGrammarParameter.ValueChanged += new EventHandler(SymbolicExpressionTreeGrammarParameter_ValueChanged);
+      RegisterGrammarHandler();
 
       //MaximumFunctionArguments.ValueChanged += new EventHandler(ArchitectureParameterValue_ValueChanged);
@@ -272 +260 @@
 
     private void SymbolicExpressionTreeGrammarParameter_ValueChanged(object sender, EventArgs e) {
-      UpdateGrammar();
-    }
-
-    private void ArchitectureParameterValue_ValueChanged(object sender, EventArgs e) {
       UpdateGrammar();
     }

branches/GrammaticalEvolution/HeuristicLab.Problems.GrammaticalEvolution/Symbolic/GESymbolicRegressionSingleObjectiveProblem.cs

@@ -73 +73 @@
 
       RegisterEventHandlers();
-      ConfigureGrammarSymbols();
       InitializeOperators();
       UpdateEstimationLimits();
@@ -84 +83 @@
 
     private void RegisterEventHandlers() {
-      SymbolicExpressionTreeGrammarParameter.ValueChanged += (o, e) => ConfigureGrammarSymbols();
+      // nothing to do
     }
 
-    private void ConfigureGrammarSymbols() {
-      var grammar = SymbolicExpressionTreeGrammar as TypeCoherentExpressionGrammar;
-      if (grammar != null) grammar.ConfigureAsDefaultRegressionGrammar();
-    }
 
     private void InitializeOperators() {

branches/GrammaticalEvolution/HeuristicLab.Problems.GrammaticalEvolution/Symbolic/IGESymbolicDataAnalysisProblem.cs

@@ -23 +23 @@
 using HeuristicLab.Data;
 using HeuristicLab.Optimization;
+using HeuristicLab.Problems.DataAnalysis;
+using HeuristicLab.Problems.DataAnalysis.Symbolic;
+using HeuristicLab.Problems.GrammaticalEvolution;
 
-namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
+namespace HeuristicLab.Problems.GrammaticalEvolution {
   public interface IGESymbolicDataAnalysisProblem : IDataAnalysisProblem, IHeuristicOptimizationProblem {
-    IValueParameter<ISymbolicDataAnalysisGrammar> SymbolicExpressionTreeGrammarParameter { get; }
+    IValueParameter<GESymbolicExpressionGrammar> SymbolicExpressionTreeGrammarParameter { get; }
     IValueParameter<ISymbolicDataAnalysisExpressionTreeInterpreter> SymbolicExpressionTreeInterpreterParameter { get; }
     //IFixedValueParameter<IntValue> MaximumSymbolicExpressionTreeDepthParameter { get; }
@@ -36 +39 @@
     IFixedValueParameter<IntRange> ValidationPartitionParameter { get; }
 
-    ISymbolicDataAnalysisGrammar SymbolicExpressionTreeGrammar { get; set; }
+    GESymbolicExpressionGrammar SymbolicExpressionTreeGrammar { get; set; }
     ISymbolicDataAnalysisExpressionTreeInterpreter SymbolicExpressionTreeInterpreter { get; set; }
     //IntValue MaximumSymbolicExpressionTreeDepth { get; }