MnScan.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_MnScan
#define ROOT_Minuit2_MnScan
 
#include "Minuit2/MnApplication.h"
#include "Minuit2/ScanMinimizer.h"
 
namespace ROOT {
 
   namespace Minuit2 {
 
 
class FCNBase;
 
//_______________________________________________________________________
/**
    API class for minimization using a scan method to find the minimum;
    allows for user interaction: set/change parameters, do minimization,
    change parameters, re-do minimization etc.;
 
 */
 
class MnScan : public MnApplication {
 
public:
 
   /// construct from FCNBase + std::vector for parameters and errors
   MnScan(const FCNBase& fcn, const std::vector<double>& par, const std::vector<double>& err, unsigned int stra = 1) : MnApplication(fcn, MnUserParameterState(par,err), MnStrategy(stra)), fMinimizer(ScanMinimizer()) {}
 
   /// construct from FCNBase + std::vector for parameters and covariance
   MnScan(const FCNBase& fcn, const std::vector<double>& par, unsigned int nrow, const std::vector<double>& cov,  unsigned int stra = 1) : MnApplication(fcn, MnUserParameterState(par, cov, nrow), MnStrategy(stra)), fMinimizer(ScanMinimizer()) {}
 
   /// construct from FCNBase + std::vector for parameters and MnUserCovariance
   MnScan(const FCNBase& fcn, const std::vector<double>& par, const MnUserCovariance& cov, unsigned int stra = 1) : MnApplication(fcn, MnUserParameterState(par, cov), MnStrategy(stra)), fMinimizer(ScanMinimizer()) {}
 
   /// construct from FCNBase + MnUserParameters
   MnScan(const FCNBase& fcn, const MnUserParameters& par, unsigned int stra = 1) : MnApplication(fcn, MnUserParameterState(par), MnStrategy(stra)), fMinimizer(ScanMinimizer()) {}
 
   /// construct from FCNBase + MnUserParameters + MnUserCovariance
   MnScan(const FCNBase& fcn, const MnUserParameters& par, const MnUserCovariance& cov, unsigned int stra = 1) : MnApplication(fcn, MnUserParameterState(par, cov), MnStrategy(stra)), fMinimizer(ScanMinimizer()) {}
 
   /// construct from FCNBase + MnUserParameterState + MnStrategy
   MnScan(const FCNBase& fcn, const MnUserParameterState& par, const MnStrategy& str) : MnApplication(fcn, MnUserParameterState(par), str), fMinimizer(ScanMinimizer()) {}
 
   MnScan(const MnScan& migr) : MnApplication(migr.Fcnbase(), migr.State(), migr.Strategy(), migr.NumOfCalls()), fMinimizer(migr.fMinimizer) {}
 
   ~MnScan() {}
 
   ModularFunctionMinimizer& Minimizer() {return fMinimizer;}
   const ModularFunctionMinimizer& Minimizer() const {return fMinimizer;}
 
   std::vector<std::pair<double, double> > Scan(unsigned int par, unsigned int maxsteps = 41, double low = 0., double high = 0.);
 
private:
 
   ScanMinimizer fMinimizer;
 
private:
 
   /// forbidden assignment (const FCNBase& = )
   MnScan& operator=(const MnScan&) {return *this;}
};
 
  }  // namespace Minuit2
 
}  // namespace ROOT
 
#endif  // ROOT_Minuit2_MnScan