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MnFcn.h
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1// @(#)root/minuit2:$Id$
2// Authors: M. Winkler, F. James, L. Moneta, A. Zsenei 2003-2005
3
4/**********************************************************************
5 * *
6 * Copyright (c) 2005 LCG ROOT Math team, CERN/PH-SFT *
7 * *
8 **********************************************************************/
9
10#ifndef ROOT_Minuit2_MnFcn
11#define ROOT_Minuit2_MnFcn
12
13#include "Minuit2/MnConfig.h"
14#include "Minuit2/MnMatrix.h"
15
16#include <vector>
17
18namespace ROOT {
19
20 namespace Minuit2 {
21
22
23class FCNBase;
24/**
25 Wrapper class to FCNBase interface used internally by Minuit.
26 Apply conversion from calling the function from a Minuit Vector (MnAlgebraicVector) to a std::vector for
27 the function coordinates.
28 The class counts also the number of function calls. By default counter strart from zero, but a different value
29 might be given if the class is instantiated later on, for example for a set of different minimizaitons
30 Normally the derived class MnUserFCN should be instantiated with performs in addition the transformatiopn
31 internal-> external parameters
32 */
33class MnFcn {
34
35public:
36
37 /// constructor of
38 explicit MnFcn(const FCNBase& fcn, int ncall = 0) : fFCN(fcn), fNumCall(ncall) {}
39
40 virtual ~MnFcn();
41
42 virtual double operator()(const MnAlgebraicVector&) const;
43 unsigned int NumOfCalls() const {return fNumCall;}
44
45 //
46 //forward interface
47 //
48 double ErrorDef() const;
49 double Up() const;
50
51 const FCNBase& Fcn() const {return fFCN;}
52
53private:
54
55 const FCNBase& fFCN;
56
57protected:
58
59 mutable int fNumCall;
60};
61
62 } // namespace Minuit2
63
64} // namespace ROOT
65
66#endif // ROOT_Minuit2_MnFcn
Interface (abstract class) defining the function to be minimized, which has to be implemented by the ...
Definition: FCNBase.h:47
Wrapper class to FCNBase interface used internally by Minuit.
Definition: MnFcn.h:33
const FCNBase & fFCN
Definition: MnFcn.h:55
double Up() const
Definition: MnFcn.cxx:35
virtual ~MnFcn()
Definition: MnFcn.cxx:19
virtual double operator()(const MnAlgebraicVector &) const
Definition: MnFcn.cxx:23
MnFcn(const FCNBase &fcn, int ncall=0)
constructor of
Definition: MnFcn.h:38
const FCNBase & Fcn() const
Definition: MnFcn.h:51
double ErrorDef() const
Definition: MnFcn.cxx:33
unsigned int NumOfCalls() const
Definition: MnFcn.h:43
Namespace for new ROOT classes and functions.
Definition: StringConv.hxx:21