Merge pull request VowpalWabbit#1073 from arielf/master

A more friendly warning on csoaa bad prediction
stephendavidmarsh · Aug 13, 2016 · a2c9c79 · a2c9c79
2 parents 30aa0de + b58f125
commit a2c9c79
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/vowpalwabbit/cost_sensitive.cc b/vowpalwabbit/cost_sensitive.cc
@@ -234,7 +234,7 @@ void output_example(vw& all, example& ec)
         min = cl.x;
     }
     if (chosen_loss == FLT_MAX)
-      cerr << "warning: csoaa predicted an invalid class" << endl;
+      cerr << "warning: csoaa predicted an invalid class. Are all multi-class labels in the {1..k} range?" << endl;
 
     loss = chosen_loss - min;
   }