FCNAdapter.h

Go to the documentation of this file.

// @(#)root/minuit2:$Id$
// Author: L. Moneta    10/2006
 
/**********************************************************************
 *                                                                    *
 * Copyright (c) 2006 ROOT Foundation,  CERN/PH-SFT                   *
 *                                                                    *
 **********************************************************************/
 
#ifndef ROOT_Minuit2_FCNAdapter
#define ROOT_Minuit2_FCNAdapter
 
#include "Minuit2/FCNBase.h"
 
namespace ROOT {
 
   namespace Minuit2 {
 
/**
 
 
template wrapped class for adapting to FCNBase signature
 
@author Lorenzo Moneta
 
@ingroup Minuit
 
*/
 
template< class Function>
class FCNAdapter : public FCNBase {
 
public:
 
   FCNAdapter(const Function & f, double up = 1.) :
      fFunc(f) ,
      fUp (up)
   {}
 
   ~FCNAdapter() {}
 
 
   double operator()(const std::vector<double>& v) const {
      return fFunc.operator()(&v[0]);
   }
   double operator()(const double *  v) const {
      return fFunc.operator()(v);
   }
   double Up() const {return fUp;}
 
   void SetErrorDef(double up) { fUp = up; }
 
   //virtual std::vector<double> Gradient(const std::vector<double>&) const;
 
   // forward interface
   //virtual double operator()(int npar, double* params,int iflag = 4) const;
 
private:
   const Function & fFunc;
   double fUp;
};
 
   } // end namespace Minuit2
 
} // end namespace ROOT
 
 
 
#endif //ROOT_Minuit2_FCNAdapter