Changeset 15207 for trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/TSNE/Distances/EuclideanDistance.cs

Timestamp:

07/12/17 15:17:41 (7 years ago)

Author:

bwerth

Message:

#2700 worked on TSNE (mostly removing unused code)

File:

• trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/TSNE/Distances/EuclideanDistance.cs (modified) (2 diffs)

trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/TSNE/Distances/EuclideanDistance.cs

@@ -32 +32 @@
   public class EuclideanDistance : DistanceBase<IEnumerable<double>> {
 
-    #region HLConstructors & Boilerplate
+    #region HLConstructors & Cloning
     [StorableConstructor]
     protected EuclideanDistance(bool deserializing) : base(deserializing) { }
@@ -40 +40 @@
     #endregion
 
-    public static double GetDistance(double[] point1, double[] point2) {
-      if (point1.Length != point2.Length) throw new ArgumentException("Euclidean distance not defined on vectors of different length");
-      return Math.Sqrt(point1.Zip(point2, (a1, b1) => (a1 - b1) * (a1 - b1)).Sum());
+    public static double GetDistance(IReadOnlyList<double> point1, IReadOnlyList<double> point2) {
+      if (point1.Count != point2.Count) throw new ArgumentException("Euclidean distance not defined on vectors of different length");
+      var sum = 0.0;
+      for (var i = 0; i < point1.Count; i++) {
+        var d = point1[i] - point2[i];
+        sum += d * d;
+      }
+
+      return Math.Sqrt(sum);
     }