Changeset 15736 for branches/1614_GeneralizedQAP/HeuristicLab.OptimizationExpertSystem.Common/3.3/Recommenders/KNearestNeighborModel.cs

Timestamp:

02/07/18 20:55:57 (6 years ago)

Author:

abeham

Message:

#1614: updates from last night ...

File:

• branches/1614_GeneralizedQAP/HeuristicLab.OptimizationExpertSystem.Common/3.3/Recommenders/KNearestNeighborModel.cs (modified) (2 diffs)

branches/1614_GeneralizedQAP/HeuristicLab.OptimizationExpertSystem.Common/3.3/Recommenders/KNearestNeighborModel.cs

@@ -20 +20 @@
 #endregion
 
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using HeuristicLab.Collections;
 using HeuristicLab.Common;
 using HeuristicLab.Optimization;
-using System;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace HeuristicLab.OptimizationExpertSystem.Common {
@@ -55 +55 @@
         else feature[f] = (feature[f] - means[f]) / sdevs[f];
       }
+      var dist = features.Select((f, i) => Math.Sqrt(f.Select((g, j) => Math.Sqrt((g - feature[j]) * (g - feature[j]))).Sum())).ToList();
       var nearestK = features.Select((f, i) => new { ProblemInstanceIndex = i, Feature = f })
-                             .OrderBy(x => x.Feature.Select((f, i) => (f - feature[i]) * (f - feature[i])).Sum());
+                             .OrderBy(x => dist[x.ProblemInstanceIndex]);
       
       var performances = new Dictionary<IAlgorithm, Performance>();