MnParameterScan.h

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// @(#)root/minuit2:$Id$
// Authors: M. Winkler, F. James, L. Moneta, A. Zsenei   2003-2005
 
/**********************************************************************
 *                                                                    *
 * Copyright (c) 2005 LCG ROOT Math team,  CERN/PH-SFT                *
 *                                                                    *
 **********************************************************************/
 
#ifndef ROOT_Minuit2_MnParameterScan
#define ROOT_Minuit2_MnParameterScan
 
#include "Minuit2/MnConfig.h"
#include "Minuit2/MnUserParameters.h"
 
#include <vector>
#include <utility>
 
namespace ROOT {
 
namespace Minuit2 {
 
class FCNBase;
 
/** Scans the values of FCN as a function of one Parameter and retains the
    best function and Parameter values found.
 */
 
class MnParameterScan {
 
public:
   MnParameterScan(const FCNBase &, const MnUserParameters &);
 
   MnParameterScan(const FCNBase &, const MnUserParameters &, double);
 
   ~MnParameterScan() {}
 
   // returns pairs of (x,y) points, x=parameter Value, y=function Value of FCN
   std::vector<std::pair<double, double>>
   operator()(unsigned int par, unsigned int maxsteps = 41, double low = 0., double high = 0.);
 
   const MnUserParameters &Parameters() const { return fParameters; }
   double Fval() const { return fAmin; }
 
private:
   const FCNBase &fFCN;
   MnUserParameters fParameters;
   double fAmin;
};
 
} // namespace Minuit2
 
} // namespace ROOT
 
#endif // ROOT_Minuit2_MnParameterScan