TFitter

class TFitter : public TVirtualFitter

    public:

                        TFitter(Int_t maxpar = 25)
                        TFitter(const TFitter&)
                virtual ~TFitter()
       virtual Double_t Chisquare(Int_t npar, Double_t* params) const
         static TClass* Class()
           virtual void Clear(Option_t* option = "")
          virtual Int_t ExecuteCommand(const char* command, Double_t* args, Int_t nargs)
           virtual void FixParameter(Int_t ipar)
      virtual Double_t* GetCovarianceMatrix() const
       virtual Double_t GetCovarianceMatrixElement(Int_t i, Int_t j) const
          virtual Int_t GetErrors(Int_t ipar, Double_t& eplus, Double_t& eminus, Double_t& eparab, Double_t& globcc) const
          virtual Int_t GetNumberFreeParameters() const
          virtual Int_t GetNumberTotalParameters() const
       virtual Double_t GetParameter(Int_t ipar) const
          virtual Int_t GetParameter(Int_t ipar, char* name, Double_t& value, Double_t& verr, Double_t& vlow, Double_t& vhigh) const
       virtual Double_t GetParError(Int_t ipar) const
          virtual Int_t GetStats(Double_t& amin, Double_t& edm, Double_t& errdef, Int_t& nvpar, Int_t& nparx) const
       virtual Double_t GetSumLog(Int_t i)
        virtual TClass* IsA() const
         virtual Bool_t IsFixed(Int_t ipar) const
               TFitter& operator=(const TFitter&)
           virtual void PrintResults(Int_t level, Double_t amin) const
           virtual void ReleaseParameter(Int_t ipar)
           virtual void SetFCN(void* fcn)
           virtual void SetFCN(void (*)(Int_t&, Double_t*, Double_t&f, Double_t*, Int_t) fcn)
           virtual void SetFitMethod(const char* name)
          virtual Int_t SetParameter(Int_t ipar, const char* parname, Double_t value, Double_t verr, Double_t vlow, Double_t vhigh)
           virtual void ShowMembers(TMemberInspector& insp, char* parent)
           virtual void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)

Data Members

    private:

          Int_t fNlog    Number of elements in fSunLog
      Double_t* fCovar   Covariance matrix
      Double_t* fSumLog  Sum of logs (array of fNlog elements)
       TMinuit* fMinuit  pointer to the TMinuit object

Class Description

*-*-*-*-*-*-*-*-*-*-*default constructor*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ===================

*-*-*-*-*-*-*-*-*-*-*default destructor*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  ==================

 return a chisquare equivalent

 reset the fitter environment

 Execute a fitter command;
   command : command string
   args    : list of nargs command arguments

 Fix parameter ipar.

 return a pointer to the covariance matrix

 return element i,j from the covariance matrix

 return current errors for a parameter
   ipar     : parameter number
   eplus    : upper error
   eminus   : lower error
   eparab   : parabolic error
   globcc   : global correlation coefficient

 return the total number of parameters (free + fixed)

 return the number of free parameters

 return error of parameter ipar

 return current value of parameter ipar

 return current values for a parameter
   ipar     : parameter number
   parname  : parameter name
   value    : initial parameter value
   verr     : initial error for this parameter
   vlow     : lower value for the parameter
   vhigh    : upper value for the parameter
  WARNING! parname must be suitably dimensionned in the calling function.

 return global fit parameters
   amin     : chisquare
   edm      : estimated distance to minimum
   errdef
   nvpar    : number of variable parameters
   nparx    : total number of parameters

 return Sum(log(i) i=0,n
 used by log likelihood fits

return kTRUE if parameter ipar is fixed, kFALSE othersise)

 Print fit results

 Release parameter ipar.

 Specify the address of the fitting algorithm (from the interpreter)

 Specify the address of the fitting algorithm

 ret fit method (chisquare or loglikelihood)

 set initial values for a parameter
   ipar     : parameter number
   parname  : parameter name
   value    : initial parameter value
   verr     : initial error for this parameter
   vlow     : lower value for the parameter
   vhigh    : upper value for the parameter

Inline Functions

            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)
            TFitter TFitter(const TFitter&)
           TFitter& operator=(const TFitter&)