eoParam, added specialization for eoValueParam<string>::getValue

FDCStat and FileSnapshot: better error messageing
Scalar fitness: is now a vector of doubles
exercise3.1 added gnuplot again

Don't know about eoCombinedContinue

eo/src/eoCombinedContinue.h

@@ -31,8 +31,8 @@
     Combined continuators - logical AND:
   Continues until one of the embedded continuators says halt!
 
-20/11/00 MS: Changed the 2-continuator construct to a vector<eoContinue<EOT> > 
-             to be consistent with other Combined constructs 
+20/11/00 MS: Changed the 2-continuator construct to a vector<eoContinue<EOT> >
+             to be consistent with other Combined constructs
              and allow to easily handle more than 2 continuators
 */
 
@@ -43,29 +43,29 @@ public:
   /// Define Fitness
   typedef typename EOT::Fitness FitnessType;
 
-  /// Ctor
+  /// Ctor, make sure that at least on continuator is present
   eoCombinedContinue( eoContinue<EOT>& _cont)
     : eoContinue<EOT> ()
-  { 
-    continuators.push_back(&_cont); 
+  {
+    continuators.push_back(&_cont);
   }
 
   /// Ctor - for historical reasons ... should disspear some day
   eoCombinedContinue( eoContinue<EOT>& _cont1, eoContinue<EOT>& _cont2)
     : eoContinue<EOT> ()
-  { 
-    continuators.push_back(&_cont1); 
-    continuators.push_back(&_cont2); 
+  {
+    continuators.push_back(&_cont1);
+    continuators.push_back(&_cont2);
   }
 
-  void add(eoContinue<EOT> & _cont)        
-  { 
-    continuators.push_back(&_cont); 
+  void add(eoContinue<EOT> & _cont)
+  {
+    continuators.push_back(&_cont);
   }
 
   /** Returns false when one of the embedded continuators say so (logical and)
    */
-  virtual bool operator() ( const eoPop<EOT>& _pop ) 
+  virtual bool operator() ( const eoPop<EOT>& _pop )
   {
     for (unsigned i = 0; i < continuators.size(); ++i)
       if ( !(*continuators[i])(_pop) ) return false;

eo/src/utils/eoFDCStat.h

@@ -32,7 +32,7 @@
 #include <utils/eoFileSnapshot.h>
 
 /**
-    The FDC computation - stores the values into eoValueParam<EOT,double> 
+    The FDC computation - stores the values into eoValueParam<EOT,double>
 so they can be snapshot by some eoGnuplotSnapshot ...
 */
 template <class EOT>
@@ -46,9 +46,9 @@ public :
 
   /** Ctor with the optimum
    */
-  eoFDCStat(eoDistance<EOT> & _dist, EOT & _theBest, 
+  eoFDCStat(eoDistance<EOT> & _dist, EOT & _theBest,
 	    std::string _description = "FDC") :
-    eoStat<EOT,double>(0, _description), dist(_dist), 
+    eoStat<EOT,double>(0, _description), dist(_dist),
     theBest(_theBest), boolOpt(true) {}
 
   /** Compute the FDC - either from best in pop, or from absolute best
@@ -56,7 +56,7 @@ public :
    */
     virtual void operator()(const eoPop<EOT>& _pop)
     {
-      if (!boolOpt)		   // take the local best 
+      if (!boolOpt)		   // take the local best
 	theBest = _pop.best_element();
       unsigned int pSize = _pop.size();
       distToBest.value().resize(pSize);
@@ -109,24 +109,24 @@ class eoFDCFileSnapshot : public eoFileSnapshot	// is an eoMonitor
 {
 public:
   /** Ctor: in addition to the parameters of the ctor of an eoFileSnapshot
-            we need here an eoFDCStat. The 2 vectors (distances to optimum 
+            we need here an eoFDCStat. The 2 vectors (distances to optimum
 	    and fitnesses) are added to the monitor so they can be processed
             later to a file - and eventually by gnuplot
   */
-  eoFDCFileSnapshot(eoFDCStat<EOT> & _FDCstat, 
-		    std::string _dirname = "tmpFDC", unsigned _frequency = 1, 
+  eoFDCFileSnapshot(eoFDCStat<EOT> & _FDCstat,
+		    std::string _dirname = "tmpFDC", unsigned _frequency = 1,
 		    std::string _filename = "FDC", std::string _delim = " "):
-    eoFileSnapshot(_dirname, _frequency, _filename, _delim), 
-    FDCstat(_FDCstat) 
+    eoFileSnapshot(_dirname, _frequency, _filename, _delim),
+    FDCstat(_FDCstat)
   {
-    eoMonitor::add(FDCstat.theDist());
-    eoMonitor::add(FDCstat.theFit());
+    eoFileSnapshot::add(FDCstat.theDist());
+    eoFileSnapshot::add(FDCstat.theFit());
   }
 
   /** just to be sure the add method is not called further
    */
-  virtual void add(const eoParam& _param) 
-    { throw runtime_error("Trying to add stats to an eoFDCFileSnapshot"); }
+  virtual void add(const eoParam& _param)
+    { throw runtime_error("eoFDCFileSnapshot::add(). Trying to add stats to an eoFDCFileSnapshot"); }
 
 private:
   eoFDCStat<EOT> & FDCstat;

eo/src/utils/eoFileSnapshot.h

@@ -166,7 +166,7 @@ public :
   {
     if (!dynamic_cast<const eoValueParam<vector<double> >*>(&_param))
     {
-      throw logic_error("eoFileSnapshot: I can only monitor vectors of doubles, sorry");
+      throw logic_error(string("eoFileSnapshot: I can only monitor vectors of doubles, sorry. The offending parameter name = ") + _param.longName());
     }
     eoMonitor::add(_param);
   }

eo/src/utils/eoParam.h

@@ -138,16 +138,16 @@ public :
    * @param _shortName          Short name of the argument (Optional)
    * @param _required           If it is a necessary parameter or not
    */
-    eoValueParam (ValueType _defaultValue, 
-                std::string _longName, 
-                std::string _description = "No description", 
+    eoValueParam (ValueType _defaultValue,
+                std::string _longName,
+                std::string _description = "No description",
                 char _shortHand = 0,
                 bool _required = false)
     : eoParam(_longName, "", _description, _shortHand, _required), repValue(_defaultValue)
     {
         eoParam::defValue(getValue());
     }
-    
+
     ValueType& value()              { return repValue; }
     ValueType  value() const        { return repValue; }
 
@@ -157,9 +157,9 @@ public :
         std::ostrstream os(buf, 1023);
         os << repValue;
         os << std::ends;
-        return os.str(); 
+        return os.str();
     }
-    
+
     void setValue(std::string _value)
     {
         std::istrstream is(_value.c_str());
@@ -170,6 +170,16 @@ private :
     ValueType repValue;
 };
 
+/*
+  Specialization for string
+*/
+template <>
+std::string eoValueParam<std::string>::getValue(void) const
+{
+  return repValue;
+}
+
+
 template <>
 void eoValueParam<bool>::setValue(std::string _value)
 {
@@ -290,9 +300,9 @@ void eoValueParam<std::vector<eoMinimizingFitness> >::setValue(std::string _valu
 class eoContainerParam : public eoParam
 {
 public :
-    eoContainerParam (ContainerType& value, string _shortName, string _longName, 
-	            string _default, 
-	            string _description, 
+    eoContainerParam (ContainerType& value, string _shortName, string _longName,
+	            string _default,
+	            string _description,
                 bool _required,
 	            bool _change )
     : value(_value), eoParam(_shortName, _longName, _description, _default, _required, _change)

eo/src/utils/eoScalarFitnessStat.h

@@ -33,11 +33,11 @@
     The fitnesses of a whole population, as a vector
 */
 template <class EOT, class FitT = typename EOT::Fitness>
-class eoScalarFitnessStat : public eoSortedStat<EOT, vector<FitT> >
+class eoScalarFitnessStat : public eoSortedStat<EOT, vector<double> >
 {
 public :
-    eoScalarFitnessStat(std::string _description = "FitnessES") : 
-      eoSortedStat<EOT,  vector<FitT> >(vector<FitT>(0), _description) {}
+    eoScalarFitnessStat(std::string _description = "FitnessES") :
+      eoSortedStat<EOT,  vector<double> >(vector<double>(0), _description) {}
 
     virtual void operator()(const vector<const EOT*>& _popPters)
     {

eo/tutorial/Lesson3/exercise3.1.cpp

@@ -64,7 +64,7 @@ void main_function(int argc, char **argv)
     eoValueParam<string> loadNameParam("", "Load","A save file to restart from",'L');
     parser.processParam( loadNameParam, "Persistence" );
     string loadName = loadNameParam.value();
- 
+
     eoValueParam<unsigned int> maxGenParam(500, "maxGen", "Maximum number of generations",'G');
     parser.processParam( maxGenParam, "Stopping criterion" );
     unsigned maxGen = maxGenParam.value();
@@ -196,7 +196,7 @@ void main_function(int argc, char **argv)
   // generational replacement at the moment :-)
   eoGenerationalReplacement<Indi> replace; 
   // want to add (weak) elitism? easy!
-  // rename the eoGenerationalReplacement replace_main, 
+  // rename the eoGenerationalReplacement replace_main,
   // then encapsulate it in the elitist replacement
   //  eoWeakElitistReplacement<Indi> replace(replace_main); 
 
@@ -285,7 +285,7 @@ void main_function(int argc, char **argv)
     // when called by the checkpoint (i.e. at every generation)
     checkpoint.add(monitor);
 
-    // the monitor will output a series of parameters: add them 
+    // the monitor will output a series of parameters: add them
     monitor.add(generationCounter);
     monitor.add(eval);		// because now eval is an eoEvalFuncCounter!
     monitor.add(bestStat);
@@ -302,7 +302,7 @@ void main_function(int argc, char **argv)
     eoFileMonitor fileMonitor("stats.xg", " ");
     // and an eoGnuplot1DMonitor will 1-print to a file, and 2- plot on screen
     eoGnuplot1DMonitor gnuMonitor("best_average.xg",minimizing_fitness<Indi>());
-     
+
     // the checkpoint mechanism can handle multiple monitors
     checkpoint.add(fileMonitor);
     checkpoint.add(gnuMonitor);
@@ -318,10 +318,10 @@ void main_function(int argc, char **argv)
 
     // send a scaling command to gnuplot
     gnuMonitor.gnuplotCommand("set yrange [0:500]");
-    /*
+
     // a specific plot monitor for FDC
     // first into a file (it adds everything ti itself
-    eoFDCFileSnapshot<Indi> fdcFileSnapshot(fdcStat);  
+    eoFDCFileSnapshot<Indi> fdcFileSnapshot(fdcStat);
     // then to a Gnuplot monitor
     eoGnuplot1DSnapshot fdcGnuplot(fdcFileSnapshot);
     // and of coruse add them to the checkPoint
@@ -331,14 +331,14 @@ void main_function(int argc, char **argv)
     // want to see how the fitness is spread?
     eoScalarFitnessStat<Indi> fitStat;
     checkpoint.add(fitStat);
-    // a gnuplot-based monitor for snapshots: needs a dir name 
+    // a gnuplot-based monitor for snapshots: needs a dir name
     // where to store the files
     eoGnuplot1DSnapshot fitSnapshot("Fitnesses");
     // add any stat that is a vector<double> to it
     fitSnapshot.add(fitStat);
     // and of course add it to the checkpoint
     checkpoint.add(fitSnapshot);
-    */
+    
     // Last type of item the eoCheckpoint can handle: state savers:
     eoState outState;
     // Register the algorithm into the state (so it has something to save!!)