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