Changeset 17391 for branches/3044_variableScaling/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Regression/RegressionProblemData.cs

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.

File:

• branches/3044_variableScaling/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Regression/RegressionProblemData.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()));
+    }
   }
 }