hill_climbing.cpp and moRandImprSelect.h have been updated

git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@977 331e1502-861f-0410-8da2-ba01fb791d7f

trunk/paradiseo-mo/src/moRandImprSelect.h

@@ -65,6 +65,7 @@ class moRandImprSelect: public moMoveSelect < M >
     initial_fitness = _fitness;
     better_fitnesses.clear();
     better_moves.clear();
+    firstTime=true;
   }
 
   //! Function that updates the fitness and move vectors
@@ -78,14 +79,13 @@ class moRandImprSelect: public moMoveSelect < M >
   */
   bool update (const M & _move, const Fitness & _fitness)
   {
+    firstTime=false;
 
     if (_fitness > initial_fitness)
       {
 	better_fitnesses.push_back(_fitness);
 	better_moves.push_back(_move);
       }
-
-    return true;
   }
 
   //! The move selection
@@ -103,7 +103,11 @@ class moRandImprSelect: public moMoveSelect < M >
     
     if( (better_fitnesses.size()==0) || (better_moves.size()==0) )
       {
-	throw std::runtime_error("[moRandImprSelect.h]: no move or/and no fitness already saved, update has to be called first.");
+	if(firstTime)
+	  {
+	    throw std::runtime_error("[moRandImprSelect.h]: no move or/and no fitness already saved, update has to be called first.");
+	  }
+	return;
       }
 
     index = rng.random (better_fitnesses.size ());
@@ -122,6 +126,9 @@ class moRandImprSelect: public moMoveSelect < M >
 
   //! Candidate move vector.
   std::vector < M > better_moves;
+
+  //! Indicate if update has been called or not.
+  bool firstTime;
 };
 
 #endif

trunk/paradiseo-mo/tutorial/Lesson1/hill_climbing.cpp

@@ -42,7 +42,7 @@ void manage_configuration_file(eoParser & _parser);
 int
 main (int _argc, char* _argv [])
 {
-  std::string instancePath;
+  std::string instancePath, selectionType;
   unsigned int seed;
 
   eoParser parser(_argc, _argv); 
@@ -51,6 +51,7 @@ main (int _argc, char* _argv [])
 
   seed=atoi( (parser.getParamWithLongName("seed")->getValue()).c_str() );
   instancePath=parser.getParamWithLongName("instancePath")->getValue();
+  selectionType=parser.getParamWithLongName("selectionType")->getValue();
 
   srand (seed);
   Graph::load(instancePath.c_str());
@@ -74,16 +75,33 @@ main (int _argc, char* _argv [])
 
   TwoOptIncrEval two_opt_incremental_evaluation;
 
-  //moFirstImprSelect <TwoOpt> two_opt_selection;
+  moMoveSelect<TwoOpt>* two_opt_selection;
-  moBestImprSelect <TwoOpt> two_opt_selection;
+
-  //moRandImprSelect <TwoOpt> two_opt_selection;
+  if(selectionType.compare("Best")==0)
+    {
+      two_opt_selection= new moBestImprSelect<TwoOpt>();
+    }
+  else if (selectionType.compare("First")==0)
+    {
+      two_opt_selection= new moFirstImprSelect<TwoOpt>();
+    }
+  else if (selectionType.compare("Random")==0)
+    {
+      two_opt_selection= new moRandImprSelect<TwoOpt>();
+    }
+  else
+    {
+      throw std::runtime_error("[hill_climbing.cpp]: the type of selection '"+selectionType+"' is not correct.");
+    }
 
   moHC <TwoOpt> hill_climbing (two_opt_initializer, two_opt_next_move_generator, two_opt_incremental_evaluation, 
-			       two_opt_selection, full_evaluation);
+			       *two_opt_selection, full_evaluation);
   hill_climbing (solution) ;
   
   std :: cout << "[To] " << solution << std :: endl;
   
+  delete(two_opt_selection);
+
   return EXIT_SUCCESS;
 }
 
@@ -96,6 +114,9 @@ manage_configuration_file(eoParser & _parser)
 			   0, "Configuration", false);
   _parser.getORcreateParam((unsigned int)time(0), "seed", "Seed for rand.", 0, "Configuration", false);
 
+  _parser.getORcreateParam(std::string("Best"), "selectionType", "Type of the selection: 'Best', 'First' or 'Random'.", 
+			   0, "Configuration", false);
+
   if (_parser.userNeedsHelp())
     {
       _parser.printHelp(std::cout);

trunk/paradiseo-mo/tutorial/Lesson1/param

@@ -4,5 +4,6 @@
 # --stopOnUnknownParam=1                   # Stop if unkown param entered
 
 ######    Configuration           ######
-# --instancePath=../examples/tsp/benchs/berlin52.tsp # Path to the instance
+# --instancePath=../examples/tsp/benchs/berlin52.tsp # Path to the instance.
-# --seed=1202916317                        # Seed for rand
+# --seed=1203517190                        # Seed for rand.
+# --selectionType=Best                     # Type of the selection: 'Best', 'First' or 'Random'.