Added the monitoring facilities for snapshots (i.e. generating and plotting a new file

every generation) which is different from the continuous monitoring (same file/plot is
angemented every generation).
This lead to a number of modifications in many files in utils dir

But now we can watch on-line
- fitness spreadout
- FDC plots
- multi-objective Pareto fronts (though the multi-objective sruff isn't there yet!)

eo/src/utils/eoGnuplot1DSnapshot.h

@@ -0,0 +1,107 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoGnuplot1DSnapshot.h
+// (c) Marc Schoenauer, Maarten Keijzer and GeNeura Team, 2000
+/* 
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+   Contact: todos@geneura.ugr.es, http://geneura.ugr.es
+             Marc.Schoenauer@polytechnique.fr
+             mkeijzer@dhi.dk
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef _eoGnuplot1DSnapshot_H
+#define _eoGnuplot1DSnapshot_H
+
+#include <string>
+
+#include <utils/eoFileSnapshot.h>
+#include <utils/eoGnuplot.h>
+#include <eoObject.h>
+
+/**
+@author Marc Schoenauer 2000
+@version 0.0
+
+This class plots through gnuplot the eoStat given as argument
+
+*/
+//-----------------------------------------------------------------------------
+
+#include <fstream>
+#include <utils/pipecom.h>
+
+
+
+/** eoGnuplot1DMonitor plots stats through gnuplot
+ *  assumes that the same file is appened every so and so, 
+ *  and replots it everytime
+ */
+class eoGnuplot1DSnapshot: public eoFileSnapshot, public eoGnuplot
+{
+ public:
+    // Ctor
+  eoGnuplot1DSnapshot(std::string _dirname, unsigned _frequency = 1, 
+	     std::string _filename = "gen", std::string _delim = " ") : 
+      eoFileSnapshot(_dirname, _frequency, _filename, _delim), 
+      eoGnuplot(_filename,"set data style points")
+  {}
+
+    // Ctor
+  eoGnuplot1DSnapshot(eoFileSnapshot & _fSnapshot) : 
+      eoFileSnapshot(_fSnapshot), 
+      eoGnuplot(_fSnapshot.baseFileName(),"set data style points")
+  {}
+  
+  // Dtor
+  virtual ~eoGnuplot1DSnapshot(){}
+
+  virtual eoMonitor&  operator() (void) ;
+
+  /// Class name.
+  virtual string className() const { return "eoGnuplot1DSnapshot"; }
+
+private: 
+};
+
+// the following should be placed in a separate eoGnuplot1DMonitor.cpp 
+
+////////////////////////////////////////////////////////////
+eoMonitor&   eoGnuplot1DSnapshot::operator() (void)
+  /////////////////////////////////////////////////////////
+{
+  // update file using the eoFileMonitor
+  eoFileSnapshot::operator()();
+
+  // sends plot order to gnuplot
+  // assumes successive plots will have same nb of columns!!!
+
+
+  char buff[1024];
+  ostrstream os(buff, 1024);
+  os << "plot";
+
+    os << " '" << getFileName().c_str() <<
+      "' notitle with points ps 5" ;
+  os << "\n";
+  os << '\0';
+  PipeComSend( gpCom, buff );
+
+  return (*this);
+}
+    
+#endif _eoGnuplot1DSnapshot_H