source: branches/Mars_IncreaseNsb/manalysis/MMarquardt.h@ 18726

Last change on this file since 18726 was 2475, checked in by wittek, 21 years ago
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1#ifndef MARS_MMarquardt
2#define MARS_MMarquardt
3
4#ifndef MARS_MParContainer
5#include "MParContainer.h"
6#endif
7
8#ifndef ROOT_TVectorD
9#include "TVectorD.h"
10#endif
11
12#ifndef ROOT_TMatrixD
13#include "TMatrixD.h"
14#endif
15
16
17class MMarquardt : public MParContainer
18{
19private:
20
21 Int_t fNumStepMax; // maximum number of steps allowed in the minimization
22 Double_t fLoopChi2; // minimization will stop when the change in chi2
23 // is less than fLoopChi2
24
25 Int_t fNpar; // number of parameters
26 Int_t fNumStep; // number of steps made
27 Double_t fChi2; // final chi2
28 Double_t fdChi2; // change of chi2 in last step
29
30 // working space for Marquardt
31 TVectorD fdParam;
32
33 TVectorD fParam;
34 TMatrixD fCovar;
35 TVectorD fGrad;
36
37 TVectorD fmyParam;
38 TMatrixD fmyCovar;
39 TVectorD fmyGrad;
40
41 Double_t fCHIq;
42 Double_t fLambda;
43 Bool_t (*fFunc)(TVectorD &, TMatrixD &, TVectorD &, Double_t &);
44
45 //working space for GaussJordan
46 TVectorD fIxc, fIxr, fIp;
47
48 Bool_t FirstCall();
49 Bool_t NextStep();
50 Bool_t CovMatrix();
51 Bool_t GaussJordan(Int_t &n, TMatrixD &covar, TVectorD &beta);
52
53
54public:
55 MMarquardt(const char *name=NULL, const char *title=NULL);
56 ~MMarquardt();
57
58 void SetNpar(Int_t npar, Int_t numstepmax, Double_t loopchi2);
59
60 Int_t Loop(Bool_t (*fcn)(TVectorD &, TMatrixD &, TVectorD &, Double_t &),
61 TVectorD &);
62
63 ClassDef(MMarquardt, 0) // Class for Marquardt minimization
64};
65
66#endif
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