root/Minuit2/VariableMetricMinimizer.h

0001 // @(#)root/minuit2:$Id$
0002 // Authors: M. Winkler, F. James, L. Moneta, A. Zsenei   2003-2005
0003
0004 /**********************************************************************
0005  *                                                                    *
0006  * Copyright (c) 2005 LCG ROOT Math team,  CERN/PH-SFT                *
0007  *                                                                    *
0008  **********************************************************************/
0009
0010 #ifndef ROOT_Minuit2_VariableMetricMinimizer
0011 #define ROOT_Minuit2_VariableMetricMinimizer
0012
0013 #include "Minuit2/MnConfig.h"
0014 #include "Minuit2/ModularFunctionMinimizer.h"
0015 #include "Minuit2/MnSeedGenerator.h"
0016 #include "Minuit2/VariableMetricBuilder.h"
0017
0018 namespace ROOT {
0019
0020 namespace Minuit2 {
0021
0022 class BFGSMinimizerType {
0023 };
0024
0025 //______________________________________________________________________________
0026 /**
0027     Instantiates the SeedGenerator and MinimumBuilder for
0028     Variable Metric Minimization method.
0029     API is provided in the upper ROOT::Minuit2::ModularFunctionMinimizer class
0030
0031  */
0032
0033 class VariableMetricMinimizer : public ModularFunctionMinimizer {
0034
0035 public:
0036    class BFGSType {
0037    };
0038
0039    VariableMetricMinimizer() = default;
0040
0041    VariableMetricMinimizer(BFGSType)
0042       : fMinSeedGen(MnSeedGenerator()), fMinBuilder(VariableMetricBuilder(VariableMetricBuilder::kBFGS))
0043    {
0044    }
0045
0046    const MinimumSeedGenerator &SeedGenerator() const override { return fMinSeedGen; }
0047    const MinimumBuilder &Builder() const override { return fMinBuilder; }
0048    MinimumBuilder &Builder() override { return fMinBuilder; }
0049
0050 private:
0051    MnSeedGenerator fMinSeedGen;
0052    VariableMetricBuilder fMinBuilder;
0053 };
0054
0055 } // namespace Minuit2
0056
0057 } // namespace ROOT
0058
0059 #endif // ROOT_Minuit2_VariableMetricMinimizer