VariableMetricMinimizer.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_VariableMetricMinimizer
#define ROOT_Minuit2_VariableMetricMinimizer
 
#include "Minuit2/MnConfig.h"
#include "Minuit2/ModularFunctionMinimizer.h"
#include "Minuit2/MnSeedGenerator.h"
#include "Minuit2/VariableMetricBuilder.h"
 
namespace ROOT {
 
namespace Minuit2 {
 
class BFGSMinimizerType {
};
 
//______________________________________________________________________________
/**
    Instantiates the SeedGenerator and MinimumBuilder for
    Variable Metric Minimization method.
    API is provided in the upper ROOT::Minuit2::ModularFunctionMinimizer class
 
 */
 
class VariableMetricMinimizer : public ModularFunctionMinimizer {
 
public:
   class BFGSType {
   };
 
   VariableMetricMinimizer() : fMinSeedGen(MnSeedGenerator()), fMinBuilder(VariableMetricBuilder()) {}
 
   VariableMetricMinimizer(BFGSType)
      : fMinSeedGen(MnSeedGenerator()), fMinBuilder(VariableMetricBuilder(VariableMetricBuilder::kBFGS))
   {
   }
 
   ~VariableMetricMinimizer() {}
 
   const MinimumSeedGenerator &SeedGenerator() const { return fMinSeedGen; }
   const MinimumBuilder &Builder() const { return fMinBuilder; }
   MinimumBuilder &Builder() { return fMinBuilder; }
 
private:
   MnSeedGenerator fMinSeedGen;
   VariableMetricBuilder fMinBuilder;
};
 
} // namespace Minuit2
 
} // namespace ROOT
 
#endif // ROOT_Minuit2_VariableMetricMinimizer