Changeset 4460 for branches/DataAnalysis/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic

Timestamp:

09/21/10 14:14:25 (14 years ago)

Author:

gkronber

Message:

Fixed bug in scaled MSE evaluator for time series. #1142

File:

• branches/DataAnalysis/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic/Evaluators/SymbolicRegressionScaledMeanAndVarianceSquaredErrorEvaluator.cs (modified) (1 diff)

branches/DataAnalysis/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic/Evaluators/SymbolicRegressionScaledMeanAndVarianceSquaredErrorEvaluator.cs

@@ -206 +206 @@
         beta = 1;
       } else {
-        if (yVarianceCalculator.Variance.IsAlmost(0.0))
+        if (yVarianceCalculator.PopulationVariance.IsAlmost(0.0))
           beta = 1;
         else
-          beta = ytCovarianceEvaluator.Covariance / yVarianceCalculator.Variance;
+          beta = ytCovarianceEvaluator.Covariance / yVarianceCalculator.PopulationVariance;
 
         alpha = tMeanCalculator.Mean - beta * yVarianceCalculator.Mean;