FumiliMinimizer.h

Go to the documentation of this file.

// @(#)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_FumiliMinimizer
#define ROOT_Minuit2_FumiliMinimizer
 
#include "Minuit2/ModularFunctionMinimizer.h"
#include "Minuit2/MnSeedGenerator.h"
#include "Minuit2/FumiliBuilder.h"
 
#include <vector>
 
namespace ROOT {
 
namespace Minuit2 {
 
class MinimumSeedGenerator;
class MinimumBuilder;
class MinimumSeed;
class MnFcn;
class FumiliFcnBase;
class GradientCalculator;
class MnUserParameterState;
class MnUserParameters;
class MnUserCovariance;
class MnStrategy;
 
//______________________________________________________________
/**
 
Instantiates the seed generator and Minimum builder for the
Fumili minimization method. Produces the Minimum via the
Minimize methods inherited from ModularFunctionMinimizer.
 
@author Andras Zsenei and Lorenzo Moneta, Creation date: 28 Sep 2004
 
@ingroup Minuit
 
*/
 
class FumiliMinimizer : public ModularFunctionMinimizer {
 
public:
   /**
 
      Constructor initializing the FumiliMinimizer by instantiatiating
      the SeedGenerator and MinimumBuilder for the Fumili minimization method.
 
      @see MnSeedGenerator
 
      @see FumiliBuilder
 
   */
 
   FumiliMinimizer() : fMinSeedGen(MnSeedGenerator()), fMinBuilder(FumiliBuilder()) {}
 
   /**
 
      Accessor to the seed generator of the minimizer.
 
      @return A reference to the seed generator used by the minimizer
 
   */
 
   const MinimumSeedGenerator &SeedGenerator() const override { return fMinSeedGen; }
 
   /**
 
      Accessor to the Minimum builder of the minimizer.
 
      @return a reference to the Minimum builder.
 
   */
 
   const FumiliBuilder &Builder() const override { return fMinBuilder; }
   FumiliBuilder &Builder() override { return fMinBuilder; }
 
   // for Fumili
 
   FunctionMinimum Minimize(const FCNBase &, const MnUserParameterState &, const MnStrategy &, unsigned int maxfcn = 0,
                            double toler = 0.1) const override;
 
   // set the type of Fumili method to use, possible values are:
   //  LineSearch based : method  = "ls"
   //  Trust region : method = "tr"
   //  Scaled trust region: method  = "trs"
   void SetMethod(const std::string & method);
 
 
   using ModularFunctionMinimizer::Minimize;
 
private:
   MnSeedGenerator fMinSeedGen;
   FumiliBuilder fMinBuilder;
};
 
} // namespace Minuit2
 
} // namespace ROOT
 
#endif // ROOT_Minuit2_FumiliMinimizer