Changeset 17303 for branches/2994-AutoDiffForIntervals/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Interpreter/MultivariateDual.cs

Timestamp:

10/03/19 12:30:19 (5 years ago)

Author:

gkronber

Message:

#2994 continued refactoring and extended unit tests. Interval calculation still fails for some edge cases (mainly for undefined behaviour). VectorEvaluator and VectorAutoDiffEvaluator produce the same results as the LinearInterpreter. TODO: check gradient calculation

File:

• branches/2994-AutoDiffForIntervals/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Interpreter/MultivariateDual.cs (modified) (2 diffs)

branches/2994-AutoDiffForIntervals/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Interpreter/MultivariateDual.cs

@@ -17 +17 @@
     public AlgebraicSparseVector<object, V> Gradient => dv; // <key,value> partial derivative identified via the key
 
+
     private MultivariateDual(MultivariateDual<V> orig) { this.v = orig.v.Clone(); this.dv = orig.dv.Clone(); }
+
+    /// <summary>
+    /// Constructor which sets value and derivative to zero
+    /// </summary>
+    public MultivariateDual() {
+      v = new V(); // assumed to be zero
+      dv = new AlgebraicSparseVector<object, V>();
+    }
 
     /// <summary>
@@ -83 +92 @@
     public MultivariateDual<V> AssignAbs(MultivariateDual<V> a) { v.AssignAbs(a.v); dv.Assign(a.dv).Scale(a.v.Clone().Sgn()); return this; }      // abs(f(x))' = f(x)*f'(x) / |f(x)|  doesn't work for intervals      
     public MultivariateDual<V> AssignSgn(MultivariateDual<V> a) { v.AssignSgn(a.v); dv = a.dv.Zero; return this; } // sign(f(x))' = 0;     
-
-    public MultivariateDual<V> AssignMin(MultivariateDual<V> other) {
-      throw new NotImplementedException();
-    }
-
-    public MultivariateDual<V> AssignMax(MultivariateDual<V> other) {
-      throw new NotImplementedException();
-    }
   }
 }