root/Minuit2/MnSimplex.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_MnSimplex
0011 #define ROOT_Minuit2_MnSimplex
0012
0013 #include "Minuit2/MnApplication.h"
0014 #include "Minuit2/SimplexMinimizer.h"
0015
0016 #include <vector>
0017
0018 namespace ROOT {
0019
0020 namespace Minuit2 {
0021
0022 class FCNBase;
0023
0024 //_________________________________________________________________________
0025 /**
0026     API class for minimization using the Simplex method, which does not need and use
0027     the derivatives of the function, but only function values.
0028     More information on the minimization method is available
0029     <A HREF="http://seal.web.cern.ch/mathlibs/documents/minuit/mntutorial.pdf">here</A>.
0030
0031     It allows for user interaction: set/change parameters, do minimization,
0032     change parameters, re-do minimization etc.;
0033  */
0034
0035 class MnSimplex : public MnApplication {
0036
0037 public:
0038    /// construct from FCNBase + MnUserParameterState + MnStrategy
0039    MnSimplex(const FCNBase &fcn, const MnUserParameterState &par, const MnStrategy &str = MnStrategy{1})
0040       : MnApplication(fcn, MnUserParameterState(par), str), fMinimizer(SimplexMinimizer())
0041    {
0042    }
0043
0044    MnSimplex(const MnSimplex &migr)
0045       : MnApplication(migr.Fcnbase(), migr.State(), migr.Strategy(), migr.NumOfCalls()), fMinimizer(migr.fMinimizer)
0046    {
0047    }
0048
0049    ModularFunctionMinimizer &Minimizer() override { return fMinimizer; }
0050    const ModularFunctionMinimizer &Minimizer() const override { return fMinimizer; }
0051
0052 private:
0053    SimplexMinimizer fMinimizer;
0054
0055 private:
0056    // forbidden assignment of migrad (const FCNBase& = )
0057    MnSimplex &operator=(const MnSimplex &) { return *this; }
0058 };
0059
0060 } // namespace Minuit2
0061
0062 } // namespace ROOT
0063
0064 #endif // ROOT_Minuit2_MnSimplex