Changeset 12893 for branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/HeuristicLab.Problems.GrammaticalOptimization/Grammar.cs

Timestamp:

08/24/15 13:56:27 (9 years ago)

Author:

gkronber

Message:

#2283: experiments on grammatical optimization algorithms (maxreward instead of avg reward, ...)

File:

• branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/HeuristicLab.Problems.GrammaticalOptimization/Grammar.cs (modified) (1 diff)

branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/HeuristicLab.Problems.GrammaticalOptimization/Grammar.cs

@@ -184 +184 @@
         Debug.Assert(maxLenOfReplacement > 0);
 
-        var alts = GetTerminalAlternatives(nt).Where(alt => MinPhraseLength(alt) <= maxLenOfReplacement);
+
+        IEnumerable<Sequence> alts;
+        if (random.NextDouble() < 0.005) {
+          alts = GetTerminalAlternatives(nt).Where(alt => MinPhraseLength(alt) <= maxLenOfReplacement);
+        } else {
+          alts = GetNonTerminalAlternatives(nt).Where(alt => MinPhraseLength(alt) <= maxLenOfReplacement);
+          if (!alts.Any())
+            alts = GetTerminalAlternatives(nt).Where(alt => MinPhraseLength(alt) <= maxLenOfReplacement);
+        }
         Debug.Assert(alts.Any());