root/Minuit2/Numerical2PGradientCalculator.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_Numerical2PGradientCalculator
0011 #define ROOT_Minuit2_Numerical2PGradientCalculator
0012
0013 #include "Minuit2/MnConfig.h"
0014
0015 #include "Minuit2/GradientCalculator.h"
0016
0017 namespace ROOT {
0018
0019 namespace Minuit2 {
0020
0021 class MnFcn;
0022 class MnUserTransformation;
0023 class MnStrategy;
0024
0025 /**
0026    class performing the numerical gradient calculation
0027  */
0028
0029 class Numerical2PGradientCalculator : public GradientCalculator {
0030
0031 public:
0032    Numerical2PGradientCalculator(const MnFcn &fcn, const MnUserTransformation &par, const MnStrategy &stra)
0033       : fFcn(fcn), fTransformation(par), fStrategy(stra)
0034    {
0035    }
0036
0037    FunctionGradient operator()(const MinimumParameters &) const override;
0038
0039    FunctionGradient operator()(const MinimumParameters &, const FunctionGradient &) const override;
0040
0041 private:
0042    const MnFcn &fFcn;
0043    const MnUserTransformation &fTransformation;
0044    const MnStrategy &fStrategy;
0045 };
0046
0047 } // namespace Minuit2
0048
0049 } // namespace ROOT
0050
0051 #endif // ROOT_Minuit2_Numerical2PGradientCalculator