Changeset 15932 for trunk/HeuristicLab.Data/3.3/TriangularMatrix.cs

Timestamp:

05/09/18 12:18:22 (6 years ago)

Author:

bburlacu

Message:

#2919: Decide to enforce symmetry by returning values mirrored across the main diagonal.

File:

• trunk/HeuristicLab.Data/3.3/TriangularMatrix.cs (modified) (1 diff)

trunk/HeuristicLab.Data/3.3/TriangularMatrix.cs

@@ -75 +75 @@
     public override T this[int rowIndex, int columnIndex] {
       get {
-        if (columnIndex > rowIndex) return default(T); // upper triangular half is zero (default value of T)
+        // provide symmetry of returned values 
+        if (columnIndex > rowIndex) return this[columnIndex, rowIndex];
         return storage[rowIndex * (rowIndex + 1) / 2 + columnIndex];
       }
       set {
-        if (columnIndex > rowIndex) throw new NotSupportedException();
-        storage[rowIndex * (rowIndex + 1) / 2 + columnIndex] = value;
+        if (columnIndex > rowIndex) this[columnIndex, rowIndex] = value;
+        else storage[rowIndex * (rowIndex + 1) / 2 + columnIndex] = value;
       }
     }