Changeset 17391

Timestamp:

12/20/19 14:00:09 (5 years ago)

Author:

djoedick

Message:

#3044: Added transformation of input variables to problem data and created scaled dataset.

Location:

branches/3044_variableScaling/HeuristicLab.Problems.DataAnalysis/3.4/Implementation

Files:

• Regression/RegressionProblemData.cs (modified) (1 diff)
• Transformations/ShiftStandardDistributionTransformation.cs (modified) (1 diff)
• Transformations/Transformation.cs (modified) (1 diff)

branches/3044_variableScaling/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Regression/RegressionProblemData.cs

@@ -170 +170 @@
     private void RegisterParameterEvents() {
       TargetVariableParameter.ValueChanged += new EventHandler(TargetVariableParameter_ValueChanged);
+      ScaleInputsParameter.Value.ValueChanged += new EventHandler(ScaleInputsParameter_ValueChanged);
     }
     private void TargetVariableParameter_ValueChanged(object sender, EventArgs e) {
       OnChanged();
     }
+
+    private void ScaleInputsParameter_ValueChanged(object sender, EventArgs e) {
+      var transformations = new ShiftStandardDistributionTransformation(Dataset.DoubleVariables);
+      transformations.Mean = 0;
+      transformations.StandardDeviation = 1;
+      var scaling = Transformation.CreateTransformations(transformations, Dataset, TrainingIndices, AllowedInputVariables);
+
+      var scaledVariables = AllowedInputVariables.Select((var, i) => new { Variable = var, Data = scaling[i].Apply(Dataset.GetDoubleValues(var)).ToArray() });
+      var newDataset = ((Dataset)Dataset).ToModifiable();
+
+      foreach (var v in scaledVariables) {
+        newDataset.ReplaceVariable(v.Variable, v.Data);
+      }
+
+      if (!Parameters.ContainsKey("Scaled Dataset"))
+        Parameters.Add(new FixedValueParameter<Dataset>("Scaled Dataset", newDataset.ToDataset()));
+    }
   }
 }

branches/3044_variableScaling/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Transformations/ShiftStandardDistributionTransformation.cs

@@ -45 +45 @@
     public double Mean {
       get { return MeanParameter.Value.Value; }
+      set { MeanParameter.Value.Value = value; }
     }
     public double StandardDeviation {
       get { return StandardDeviationParameter.Value.Value; }
+      set { StandardDeviationParameter.Value.Value = value; }
     }
     #endregion

branches/3044_variableScaling/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Transformations/Transformation.cs

@@ -74 +74 @@
     /// <param name="allowedInputVariables"></param>
     /// <returns></returns>
-    public static ITransformation<double>[] CreateTransformations(ITransformation<double> transformation, IDataset dataset, int[] rows, IReadOnlyCollection<string> allowedInputVariables) {
-      var trans = new ITransformation<double>[allowedInputVariables.Count];
+    public static ITransformation<double>[] CreateTransformations(ITransformation<double> transformation, IDataset dataset, IEnumerable<int> rows, IEnumerable<string> allowedInputVariables) {
+      var trans = new ITransformation<double>[allowedInputVariables.Count()];
       int i = 0;
       foreach (var variable in allowedInputVariables) {