ROOT   Reference Guide
MinimumError.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_MinimumError
11#define ROOT_Minuit2_MinimumError
12
15
16namespace ROOT {
17
18 namespace Minuit2 {
19
20
21/** MinimumError keeps the inv. 2nd derivative (inv. Hessian) used for
22 calculating the Parameter step size (-V*g) and for the covariance Update
23 (ErrorUpdator). The covariance matrix is equal to twice the inv. Hessian.
24 */
25
27
28public:
29
30 class MnNotPosDef {};
32 class MnHesseFailed {};
34
35public:
36
38
40
42
44
46
48
50
52
54 fData = err.fData;
55 return *this;
56 }
57
58 MnAlgebraicSymMatrix Matrix() const {return fData->Matrix();}
59
60 const MnAlgebraicSymMatrix& InvHessian() const {return fData->InvHessian();}
61
62 MnAlgebraicSymMatrix Hessian() const {return fData->Hessian();}
63
64 double Dcovar() const {return fData->Dcovar();}
65 bool IsAccurate() const {return fData->IsAccurate();}
66 bool IsValid() const {return fData->IsValid();}
67 bool IsPosDef() const {return fData->IsPosDef();}
69 bool HesseFailed() const {return fData->HesseFailed();}
70 bool InvertFailed() const {return fData->InvertFailed();}
71 bool IsAvailable() const {return fData->IsAvailable();}
72
73private:
74
76};
77
78 } // namespace Minuit2
79
80} // namespace ROOT
81
82#endif // ROOT_Minuit2_MinimumError
#define e(i)
Definition: RSha256.hxx:103
Internal Class containing the error information on the estimated minimum : Error matrix + dcovar + ad...
Class describing a symmetric matrix of size n.
Definition: LASymMatrix.h:51
MinimumError keeps the inv.
Definition: MinimumError.h:26
MinimumError(const MinimumError &e)
Definition: MinimumError.h:51
Definition: MinimumError.h:43
MinimumError(unsigned int n)
Definition: MinimumError.h:37
MinimumError & operator=(const MinimumError &err)
Definition: MinimumError.h:53
const MnAlgebraicSymMatrix & InvHessian() const
Definition: MinimumError.h:60
MnAlgebraicSymMatrix Matrix() const
Definition: MinimumError.h:58
MnAlgebraicSymMatrix Hessian() const
Definition: MinimumError.h:62
MinimumError(const MnAlgebraicSymMatrix &mat, MnHesseFailed)
Definition: MinimumError.h:41
MinimumError(const MnAlgebraicSymMatrix &mat, MnInvertFailed)
Definition: MinimumError.h:45
MinimumError(const MnAlgebraicSymMatrix &mat, double dcov)
Definition: MinimumError.h:39
MnRefCountedPointer< BasicMinimumError > fData
Definition: MinimumError.h:75
MinimumError(const MnAlgebraicSymMatrix &mat, MnNotPosDef)
Definition: MinimumError.h:47
const Int_t n
Definition: legend1.C:16
tbb::task_arena is an alias of tbb::interface7::task_arena, which doesn't allow to forward declare tb...
Definition: StringConv.hxx:21