Changeset 10169

Timestamp:

11/27/13 17:19:47 (11 years ago)

Author:

sbreuer

Message:

• implemented GetStandardDeviation

File:

• branches/DataPreprocessing/HeuristicLab.DataPreprocessing/3.3/PreprocessingDataStatisticInfo.cs (modified) (1 diff)

branches/DataPreprocessing/HeuristicLab.DataPreprocessing/3.3/PreprocessingDataStatisticInfo.cs

@@ -89 +89 @@
 
     public double GetStandardDeviation(int columnIndex) {
-      throw new System.NotImplementedException();
+      double stdDev = double.NaN;
+      if (preprocessingData.IsType<double>(columnIndex)) {
+        double avg = GetAverage(columnIndex);
+        stdDev = Math.Sqrt(preprocessingData.GetValues<double>(columnIndex).Sum(x => (x - avg) * (x - avg)) / (preprocessingData.Rows - 1));
+      }
+      return stdDev;
     }