Changeset 14351 for branches/symbreg-factors-2650/HeuristicLab.Problems.DataAnalysis/3.4/Implementation

Timestamp:

10/23/16 09:44:29 (8 years ago)

Author:

gkronber

Message:

#2650: merged r14332:14350 from trunk to branch

Location:

branches/symbreg-factors-2650

Files:

• . (modified) (1 prop)
• HeuristicLab.Problems.DataAnalysis (modified) (1 prop)
• HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Regression/RegressionSolutionVariableImpactsCalculator.cs (modified) (2 diffs)

branches/symbreg-factors-2650/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Regression/RegressionSolutionVariableImpactsCalculator.cs

@@ -171 +171 @@
           // new var has same empirical distribution but the relation to y is broken
           rand = new FastRandom(31415);
-          replacementValues = rows.Select(r => originalValues[r]).Shuffle(rand).ToList();
+          // prepare a complete column for the dataset
+          replacementValues = Enumerable.Repeat(double.NaN, dataset.Rows).ToList();
+          // shuffle only the selected rows
+          var shuffledValues = rows.Select(r => originalValues[r]).Shuffle(rand).ToList();
+          int i = 0;
+          // update column values 
+          foreach (var r in rows) {
+            replacementValues[r] = shuffledValues[i++];
+          }
           break;
         case ReplacementMethodEnum.Noise:
@@ -177 +185 @@
           var stdDev = rows.Select(r => originalValues[r]).StandardDeviation();
           rand = new FastRandom(31415);
-          replacementValues = rows.Select(_ => NormalDistributedRandom.NextDouble(rand, avg, stdDev)).ToList();
+          // prepare a complete column for the dataset
+          replacementValues = Enumerable.Repeat(double.NaN, dataset.Rows).ToList();
+          // update column values 
+          foreach (var r in rows) {
+            replacementValues[r] = NormalDistributedRandom.NextDouble(rand, avg, stdDev);
+          }
           break;