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/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)
     {