Changeset 9406

Timestamp:

04/30/13 10:54:02 (12 years ago)

Author:

gkronber

Message:

#1423: throw an exception with an error message if alglib terminates LBFGS

File:

• trunk/sources/HeuristicLab.Algorithms.GradientDescent/3.3/LbfgsMakeStep.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Algorithms.GradientDescent/3.3/LbfgsMakeStep.cs

@@ -79 +79 @@
         alglib.minlbfgs.minlbfgsreport rep = new alglib.minlbfgs.minlbfgsreport();
         alglib.minlbfgs.minlbfgsresults(state.State, ref x, rep);
+        if (rep.terminationtype < 0) {
+          if (rep.terminationtype == -1)
+            throw new OperatorExecutionException(this, "Incorrect parameters were specified.");
+          else if (rep.terminationtype == -2)
+            throw new OperatorExecutionException(this, "Rounding errors prevent further improvement.");
+          else if (rep.terminationtype == -7)
+            throw new OperatorExecutionException(this, "Gradient verification failed.");
+        }
         PointParameter.ActualValue = new RealVector(x);
       }