Changeset 8646

Timestamp:

09/13/12 17:38:12 (12 years ago)

Author:

mkommend

Message:

#1924: Corrected Pearson's R² evaluator for classification (estimated values were not limited in quality calculation)

File:

• trunk/sources/HeuristicLab.Problems.DataAnalysis.Symbolic.Classification/3.4/SingleObjective/SymbolicClassificationSingleObjectivePearsonRSquaredEvaluator.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Problems.DataAnalysis.Symbolic.Classification/3.4/SingleObjective/SymbolicClassificationSingleObjectivePearsonRSquaredEvaluator.cs

@@ -55 +55 @@
       IEnumerable<double> estimatedValues = interpreter.GetSymbolicExpressionTreeValues(solution, problemData.Dataset, rows);
       IEnumerable<double> originalValues = problemData.Dataset.GetDoubleValues(problemData.TargetVariable, rows);
+      IEnumerable<double> boundedEstimationValues = estimatedValues.LimitToRange(lowerEstimationLimit, upperEstimationLimit);
       OnlineCalculatorError errorState;
-      double r2 = OnlinePearsonsRSquaredCalculator.Calculate(estimatedValues, originalValues, out errorState);
+      double r2 = OnlinePearsonsRSquaredCalculator.Calculate(boundedEstimationValues, originalValues, out errorState);
       if (errorState != OnlineCalculatorError.None) return 0.0;
       else return r2;