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Reference Guide
TFitter.h
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1 // @(#)root/minuit:$Id$
2 // Author: Rene Brun 31/08/99
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 #ifndef ROOT_TFitter
12 #define ROOT_TFitter
13 
14 
15 #include "TVirtualFitter.h"
16 
17 class TMinuit;
18 
19 class TFitter : public TVirtualFitter {
20 
21 private:
22  Int_t fNlog; //Number of elements in fSunLog
23  Double_t *fCovar; //Covariance matrix
24  Double_t *fSumLog; //Sum of logs (array of fNlog elements)
25  TMinuit *fMinuit; //pointer to the TMinuit object
26 
27  TFitter(const TFitter&); // Not implemented
28  TFitter& operator=(const TFitter&); // Not implemented
29 
30 public:
31  TFitter(Int_t maxpar = 25);
32  virtual ~TFitter();
33  virtual Double_t Chisquare(Int_t npar, Double_t *params) const ;
34  virtual void Clear(Option_t *option="");
35  virtual Int_t ExecuteCommand(const char *command, Double_t *args, Int_t nargs);
36  // virtual void FitChisquare(Int_t &npar, Double_t *gin, Double_t &f, Double_t *u, Int_t flag);
37  // virtual void FitChisquareI(Int_t &npar, Double_t *gin, Double_t &f, Double_t *u, Int_t flag);
38  // virtual void FitLikelihood(Int_t &npar, Double_t *gin, Double_t &f, Double_t *u, Int_t flag);
39  // virtual void FitLikelihoodI(Int_t &npar, Double_t *gin, Double_t &f, Double_t *u, Int_t flag);
40  virtual void FixParameter(Int_t ipar);
41  virtual void GetConfidenceIntervals(Int_t n, Int_t ndim, const Double_t *x, Double_t *ci, Double_t cl=0.95);
42  virtual void GetConfidenceIntervals(TObject *obj, Double_t cl=0.95);
43  virtual Double_t *GetCovarianceMatrix() const;
44  virtual Double_t GetCovarianceMatrixElement(Int_t i, Int_t j) const;
45  virtual Int_t GetErrors(Int_t ipar,Double_t &eplus, Double_t &eminus, Double_t &eparab, Double_t &globcc) const;
46  TMinuit *GetMinuit() const {return fMinuit;}
47  virtual Int_t GetNumberTotalParameters() const;
48  virtual Int_t GetNumberFreeParameters() const;
49  virtual Double_t GetParError(Int_t ipar) const;
50  virtual Double_t GetParameter(Int_t ipar) const;
51  virtual Int_t GetParameter(Int_t ipar,char *name,Double_t &value,Double_t &verr,Double_t &vlow, Double_t &vhigh) const;
52  virtual const char *GetParName(Int_t ipar) const;
53  virtual Int_t GetStats(Double_t &amin, Double_t &edm, Double_t &errdef, Int_t &nvpar, Int_t &nparx) const;
54  virtual Double_t GetSumLog(Int_t i);
55  virtual Bool_t IsFixed(Int_t ipar) const;
56  virtual void PrintResults(Int_t level, Double_t amin) const;
57  virtual void ReleaseParameter(Int_t ipar);
58  virtual void SetFCN(void (*fcn)(Int_t &, Double_t *, Double_t &f, Double_t *, Int_t));
59  virtual void SetFitMethod(const char *name);
60  virtual Int_t SetParameter(Int_t ipar,const char *parname,Double_t value,Double_t verr,Double_t vlow, Double_t vhigh);
61 
62  ClassDef(TFitter,0) //The ROOT standard fitter based on TMinuit
63 };
64 
65 #endif
TFitter(const TFitter &)
virtual Bool_t IsFixed(Int_t ipar) const
return kTRUE if parameter ipar is fixed, kFALSE othersise)
Definition: TFitter.cxx:537
TFitter & operator=(const TFitter &)
virtual void PrintResults(Int_t level, Double_t amin) const
Print fit results.
Definition: TFitter.cxx:547
Implementation in C++ of the Minuit package written by Fred James.
Definition: TMinuit.h:27
virtual Double_t GetCovarianceMatrixElement(Int_t i, Int_t j) const
return element i,j from the covariance matrix
Definition: TFitter.cxx:394
virtual Double_t * GetCovarianceMatrix() const
return a pointer to the covariance matrix
Definition: TFitter.cxx:382
const char Option_t
Definition: RtypesCore.h:62
virtual Int_t GetErrors(Int_t ipar, Double_t &eplus, Double_t &eminus, Double_t &eparab, Double_t &globcc) const
return current errors for a parameter ipar : parameter number eplus : upper error eminus : lower erro...
Definition: TFitter.cxx:413
#define f(i)
Definition: RSha256.hxx:104
int Int_t
Definition: RtypesCore.h:41
bool Bool_t
Definition: RtypesCore.h:59
virtual Int_t ExecuteCommand(const char *command, Double_t *args, Int_t nargs)
Execute a fitter command; command : command string args : list of nargs command arguments.
Definition: TFitter.cxx:92
virtual const char * GetParName(Int_t ipar) const
return name of parameter ipar
Definition: TFitter.cxx:490
virtual ~TFitter()
Default destructor.
Definition: TFitter.cxx:55
Double_t x[n]
Definition: legend1.C:17
#define ClassDef(name, id)
Definition: Rtypes.h:326
virtual void ReleaseParameter(Int_t ipar)
Release parameter ipar.
Definition: TFitter.cxx:555
Double_t * fSumLog
Definition: TFitter.h:24
virtual Int_t GetNumberFreeParameters() const
return the number of free parameters
Definition: TFitter.cxx:433
virtual void SetFCN(void(*fcn)(Int_t &, Double_t *, Double_t &f, Double_t *, Int_t))
Specify the address of the fitting algorithm.
Definition: TFitter.cxx:564
virtual Double_t GetParameter(Int_t ipar) const
return current value of parameter ipar
Definition: TFitter.cxx:456
Double_t * fCovar
Definition: TFitter.h:23
virtual Double_t Chisquare(Int_t npar, Double_t *params) const
Definition: TFitter.cxx:65
TMinuit * GetMinuit() const
Definition: TFitter.h:46
virtual void SetFitMethod(const char *name)
ret fit method (chisquare or loglikelihood)
Definition: TFitter.cxx:574
virtual Double_t GetSumLog(Int_t i)
return Sum(log(i) i=0,n used by log likelihood fits
Definition: TFitter.cxx:516
double Double_t
Definition: RtypesCore.h:55
The ROOT standard fitter based on TMinuit.
Definition: TFitter.h:19
virtual Double_t GetParError(Int_t ipar) const
return error of parameter ipar
Definition: TFitter.cxx:442
virtual void GetConfidenceIntervals(Int_t n, Int_t ndim, const Double_t *x, Double_t *ci, Double_t cl=0.95)
Computes point-by-point confidence intervals for the fitted function.
Definition: TFitter.cxx:122
Int_t fNlog
Definition: TFitter.h:22
virtual void FixParameter(Int_t ipar)
Fix parameter ipar.
Definition: TFitter.cxx:103
TMinuit * fMinuit
Definition: TFitter.h:25
Abstract Base Class for Fitting.
Mother of all ROOT objects.
Definition: TObject.h:37
static constexpr double eplus
virtual void Clear(Option_t *option="")
reset the fitter environment
Definition: TFitter.cxx:76
virtual Int_t GetNumberTotalParameters() const
return the total number of parameters (free + fixed)
Definition: TFitter.cxx:425
virtual Int_t GetStats(Double_t &amin, Double_t &edm, Double_t &errdef, Int_t &nvpar, Int_t &nparx) const
return global fit parameters
Definition: TFitter.cxx:505
const Int_t n
Definition: legend1.C:16
char name[80]
Definition: TGX11.cxx:109
virtual Int_t SetParameter(Int_t ipar, const char *parname, Double_t value, Double_t verr, Double_t vlow, Double_t vhigh)
set initial values for a parameter
Definition: TFitter.cxx:596