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TFitter Class Reference

Legacy Code

TFitter is a legacy interface: there will be no bug fixes nor new developments. Therefore it is not recommended to use it in new long-term production code. But, depending on the context, using TFitter might still be a valid solution. Consider switching to ROOT::Fit::Fitter.

The ROOT standard fitter based on TMinuit

Definition at line 19 of file TFitter.h.

Public Member Functions

 TFitter (Int_t maxpar=25)
 Default constructor.
 
 ~TFitter () override
 Default destructor.
 
Double_t Chisquare (Int_t npar, Double_t *params) const override
 
void Clear (Option_t *option="") override
 reset the fitter environment
 
Int_t ExecuteCommand (const char *command, Double_t *args, Int_t nargs) override
 Execute a fitter command; command : command string args : list of nargs command arguments.
 
void FixParameter (Int_t ipar) override
 Fix parameter ipar.
 
void GetConfidenceIntervals (Int_t n, Int_t ndim, const Double_t *x, Double_t *ci, Double_t cl=0.95) override
 Computes point-by-point confidence intervals for the fitted function.
 
void GetConfidenceIntervals (TObject *obj, Double_t cl=0.95) override
 Computes confidence intervals at level cl.
 
Double_tGetCovarianceMatrix () const override
 return a pointer to the covariance matrix
 
Double_t GetCovarianceMatrixElement (Int_t i, Int_t j) const override
 return element i,j from the covariance matrix
 
Int_t GetErrors (Int_t ipar, Double_t &eplus, Double_t &eminus, Double_t &eparab, Double_t &globcc) const override
 return current errors for a parameter ipar : parameter number eplus : upper error eminus : lower error eparab : parabolic error globcc : global correlation coefficient
 
TMinuitGetMinuit () const
 
Int_t GetNumberFreeParameters () const override
 return the number of free parameters
 
Int_t GetNumberTotalParameters () const override
 return the total number of parameters (free + fixed)
 
Double_t GetParameter (Int_t ipar) const override
 return current value of parameter ipar
 
Int_t GetParameter (Int_t ipar, char *name, Double_t &value, Double_t &verr, Double_t &vlow, Double_t &vhigh) const override
 return current values for a parameter
 
Double_t GetParError (Int_t ipar) const override
 return error of parameter ipar
 
const char * GetParName (Int_t ipar) const override
 return name of parameter ipar
 
Int_t GetStats (Double_t &amin, Double_t &edm, Double_t &errdef, Int_t &nvpar, Int_t &nparx) const override
 return global fit parameters
 
Double_t GetSumLog (Int_t i) override
 return Sum(log(i) i=0,n used by log likelihood fits
 
TClassIsA () const override
 
Bool_t IsFixed (Int_t ipar) const override
 return kTRUE if parameter ipar is fixed, kFALSE otherwise)
 
void PrintResults (Int_t level, Double_t amin) const override
 Print fit results.
 
void ReleaseParameter (Int_t ipar) override
 Release parameter ipar.
 
void SetFCN (void(*fcn)(Int_t &, Double_t *, Double_t &f, Double_t *, Int_t)) override
 Specify the address of the fitting algorithm.
 
void SetFitMethod (const char *name) override
 ret fit method (chisquare or log-likelihood)
 
Int_t SetParameter (Int_t ipar, const char *parname, Double_t value, Double_t verr, Double_t vlow, Double_t vhigh) override
 set initial values for a parameter
 
void Streamer (TBuffer &) override
 Stream an object of class TObject.
 
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
 
- Public Member Functions inherited from TVirtualFitter
 TVirtualFitter ()
 Default constructor.
 
 ~TVirtualFitter () override
 Cleanup virtual fitter.
 
virtual FCNFunc_t GetFCN ()
 
virtual Foption_t GetFitOption () const
 
TMethodCallGetMethodCall () const
 
virtual TObjectGetObjectFit () const
 
virtual TObjectGetUserFunc () const
 
virtual Int_t GetXfirst () const
 
virtual Int_t GetXlast () const
 
virtual Int_t GetYfirst () const
 
virtual Int_t GetYlast () const
 
virtual Int_t GetZfirst () const
 
virtual Int_t GetZlast () const
 
TClassIsA () const override
 
virtual Double_tSetCache (Int_t npoints, Int_t psize)
 Initialize the cache array npoints is the number of points to be stored (or already stored) in the cache psize is the number of elements per point.
 
virtual void SetFitOption (Foption_t option)
 
virtual void SetObjectFit (TObject *obj)
 
virtual void SetUserFunc (TObject *userfunc)
 
virtual void SetXfirst (Int_t first)
 
virtual void SetXlast (Int_t last)
 
virtual void SetYfirst (Int_t first)
 
virtual void SetYlast (Int_t last)
 
virtual void SetZfirst (Int_t first)
 
virtual void SetZlast (Int_t last)
 
void Streamer (TBuffer &) override
 Stream an object of class TObject.
 
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
 
- Public Member Functions inherited from TNamed
 TNamed ()
 
 TNamed (const char *name, const char *title)
 
 TNamed (const TNamed &named)
 TNamed copy ctor.
 
 TNamed (const TString &name, const TString &title)
 
virtual ~TNamed ()
 TNamed destructor.
 
TObjectClone (const char *newname="") const override
 Make a clone of an object using the Streamer facility.
 
Int_t Compare (const TObject *obj) const override
 Compare two TNamed objects.
 
void Copy (TObject &named) const override
 Copy this to obj.
 
virtual void FillBuffer (char *&buffer)
 Encode TNamed into output buffer.
 
const char * GetName () const override
 Returns name of object.
 
const char * GetTitle () const override
 Returns title of object.
 
ULong_t Hash () const override
 Return hash value for this object.
 
Bool_t IsSortable () const override
 
void ls (Option_t *option="") const override
 List TNamed name and title.
 
TNamedoperator= (const TNamed &rhs)
 TNamed assignment operator.
 
void Print (Option_t *option="") const override
 Print TNamed name and title.
 
virtual void SetName (const char *name)
 Set the name of the TNamed.
 
virtual void SetNameTitle (const char *name, const char *title)
 Set all the TNamed parameters (name and title).
 
virtual void SetTitle (const char *title="")
 Set the title of the TNamed.
 
virtual Int_t Sizeof () const
 Return size of the TNamed part of the TObject.
 
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor.
 
 TObject (const TObject &object)
 TObject copy ctor.
 
virtual ~TObject ()
 TObject destructor.
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract.
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad.
 
virtual void Browse (TBrowser *b)
 Browse object. May be overridden for another default action.
 
ULong_t CheckedHash ()
 Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs.
 
virtual void Delete (Option_t *option="")
 Delete this object.
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object.
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects.
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs.
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
 
virtual void Dump () const
 Dump contents of object on stdout.
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message.
 
virtual void Execute (const char *method, const char *params, Int_t *error=nullptr)
 Execute method on this object with the given parameter string, e.g.
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr)
 Execute method on this object with parameters stored in the TObjArray.
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py).
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message.
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes.
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes.
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object.
 
virtual const char * GetIconName () const
 Returns mime type name of object.
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py).
 
virtual Option_tGetOption () const
 
virtual UInt_t GetUniqueID () const
 Return the unique object id.
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out.
 
Bool_t HasInconsistentHash () const
 Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message.
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname".
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl.
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas.
 
void InvertBit (UInt_t f)
 
Bool_t IsDestructed () const
 IsDestructed.
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory).
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
void MayNotUse (const char *method) const
 Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification (the base implementation is no-op).
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete.
 
void operator delete (void *ptr)
 Operator delete.
 
void operator delete (void *ptr, void *vp)
 Only called by placement new when throwing an exception.
 
void operator delete[] (void *ptr)
 Operator delete [].
 
void operator delete[] (void *ptr, void *vp)
 Only called by placement new[] when throwing an exception.
 
void * operator new (size_t sz)
 
void * operator new (size_t sz, void *vp)
 
void * operator new[] (size_t sz)
 
void * operator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator.
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself.
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list.
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory.
 
virtual void RecursiveRemove (TObject *obj)
 Recursively remove this object from a list.
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename.
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out".
 
void SetBit (UInt_t f)
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f.
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object.
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id.
 
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
 
virtual void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message.
 
R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const
 
Int_t TestBits (UInt_t f) const
 
virtual void UseCurrentStyle ()
 Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message.
 
virtual Int_t Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory.
 
virtual Int_t Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory.
 

Static Public Member Functions

static TClassClass ()
 
static const char * Class_Name ()
 
static constexpr Version_t Class_Version ()
 
static const char * DeclFileName ()
 
- Static Public Member Functions inherited from TVirtualFitter
static TClassClass ()
 
static const char * Class_Name ()
 
static constexpr Version_t Class_Version ()
 
static const char * DeclFileName ()
 
static TVirtualFitterFitter (TObject *obj, Int_t maxpar=25)
 Static function returning a pointer to the current fitter.
 
static const char * GetDefaultFitter ()
 static: return the name of the default fitter
 
static Double_t GetErrorDef ()
 static: Return the Error Definition
 
static TVirtualFitterGetFitter ()
 static: return the current Fitter
 
static Int_t GetMaxIterations ()
 static: Return the maximum number of iterations actually max number of function calls
 
static Double_t GetPrecision ()
 static: Return the fit relative precision
 
static void SetDefaultFitter (const char *name="")
 static: set name of default fitter
 
static void SetErrorDef (Double_t errdef=1)
 static: Set the Error Definition (default=1) For Minuit this is the value passed with the "SET ERR" command (see https://cern-tex.web.cern.ch/cern-tex/minuit/node18.html)
 
static void SetFitter (TVirtualFitter *fitter, Int_t maxpar=25)
 Static function to set an alternative fitter.
 
static void SetMaxIterations (Int_t niter=5000)
 static: Set the maximum number of function calls for the minimization algorithm For example for MIGRAD this is the maxcalls value passed as first argument (see https://cern-tex.web.cern.ch/cern-tex/minuit/node18.html )
 
static void SetPrecision (Double_t prec=1e-6)
 static: Set the tolerance used in the minimization algorithm For example for MIGRAD this is tolerance value passed as second argument (see https://cern-tex.web.cern.ch/cern-tex/minuit/node18.html )
 
- Static Public Member Functions inherited from TNamed
static TClassClass ()
 
static const char * Class_Name ()
 
static constexpr Version_t Class_Version ()
 
static const char * DeclFileName ()
 
- Static Public Member Functions inherited from TObject
static TClassClass ()
 
static const char * Class_Name ()
 
static constexpr Version_t Class_Version ()
 
static const char * DeclFileName ()
 
static Longptr_t GetDtorOnly ()
 Return destructor only flag.
 
static Bool_t GetObjectStat ()
 Get status of object stat flag.
 
static void SetDtorOnly (void *obj)
 Set destructor only flag.
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable.
 

Private Member Functions

 TFitter (const TFitter &)
 
TFitteroperator= (const TFitter &)
 

Private Attributes

Double_tfCovar
 
TMinuitfMinuit
 
Int_t fNlog
 
Double_tfSumLog
 

Additional Inherited Members

- Public Types inherited from TVirtualFitter
typedef void(* FCNFunc_t) (Int_t &npar, Double_t *gin, Double_t &f, Double_t *u, Int_t flag)
 
- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }
 
enum  EStatusBits {
  kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) ,
  kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 ))
}
 
- Protected Types inherited from TObject
enum  { kOnlyPrepStep = (1ULL << ( 3 )) }
 
- Protected Member Functions inherited from TVirtualFitter
 TVirtualFitter (const TVirtualFitter &tvf)
 copy constructor
 
TVirtualFitteroperator= (const TVirtualFitter &tvf)
 assignment operator
 
- Protected Member Functions inherited from TObject
virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
 Interface to ErrorHandler (protected).
 
void MakeZombie ()
 
- Protected Attributes inherited from TVirtualFitter
Double_tfCache
 [fCacheSize] Array of points data (fNpoints*fPointSize < fCacheSize words)
 
Int_t fCacheSize
 Size of the fCache array.
 
void(* fFCN )(Int_t &npar, Double_t *gin, Double_t &f, Double_t *u, Int_t flag)
 
TMethodCallfMethodCall
 Pointer to MethodCall in case of interpreted function.
 
Int_t fNpoints
 Number of points to fit.
 
TObjectfObjectFit
 Pointer to object being fitted.
 
Foption_t fOption
 Struct with the fit options.
 
Int_t fPointSize
 Number of words per point in the cache.
 
TObjectfUserFunc
 Pointer to user theoretical function (a TF1*)
 
Int_t fXfirst
 First bin on X axis.
 
Int_t fXlast
 Last bin on X axis.
 
Int_t fYfirst
 First bin on Y axis.
 
Int_t fYlast
 Last bin on Y axis.
 
Int_t fZfirst
 First bin on Z axis.
 
Int_t fZlast
 Last bin on Z axis.
 
- Protected Attributes inherited from TNamed
TString fName
 
TString fTitle
 

#include <TFitter.h>

Inheritance diagram for TFitter:
[legend]

Constructor & Destructor Documentation

◆ TFitter() [1/2]

TFitter::TFitter ( const TFitter )
private

◆ TFitter() [2/2]

TFitter::TFitter ( Int_t  maxpar = 25)

Default constructor.

Definition at line 39 of file TFitter.cxx.

◆ ~TFitter()

TFitter::~TFitter ( )
override

Default destructor.

Definition at line 51 of file TFitter.cxx.

Member Function Documentation

◆ Chisquare()

Double_t TFitter::Chisquare ( Int_t  npar,
Double_t params 
) const
overridevirtual
Deprecated:
Use ROOT::Fit::Chisquare class instead.

return a chisquare equivalent

Implements TVirtualFitter.

Definition at line 64 of file TFitter.cxx.

◆ Class()

static TClass * TFitter::Class ( )
static
Returns
TClass describing this class

◆ Class_Name()

static const char * TFitter::Class_Name ( )
static
Returns
Name of this class

◆ Class_Version()

static constexpr Version_t TFitter::Class_Version ( )
inlinestaticconstexpr
Returns
Version of this class

Definition at line 62 of file TFitter.h.

◆ Clear()

void TFitter::Clear ( Option_t option = "")
overridevirtual

reset the fitter environment

Implements TVirtualFitter.

Definition at line 73 of file TFitter.cxx.

◆ DeclFileName()

static const char * TFitter::DeclFileName ( )
inlinestatic
Returns
Name of the file containing the class declaration

Definition at line 62 of file TFitter.h.

◆ ExecuteCommand()

Int_t TFitter::ExecuteCommand ( const char *  command,
Double_t args,
Int_t  nargs 
)
overridevirtual

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

Implements TVirtualFitter.

Definition at line 89 of file TFitter.cxx.

◆ FixParameter()

void TFitter::FixParameter ( Int_t  ipar)
overridevirtual

Fix parameter ipar.

Implements TVirtualFitter.

Definition at line 100 of file TFitter.cxx.

◆ GetConfidenceIntervals() [1/2]

void TFitter::GetConfidenceIntervals ( Int_t  n,
Int_t  ndim,
const Double_t x,
Double_t ci,
Double_t  cl = 0.95 
)
overridevirtual

Computes point-by-point confidence intervals for the fitted function.

Parameters:

  • n - number of points
  • ndim - dimensions of points
  • x - points, at which to compute the intervals, for ndim > 1 should be in order: (x0,y0, x1, y1, ... xn, yn)
  • ci - computed intervals are returned in this array
  • cl - confidence level, default=0.95

NOTE, that the intervals are approximate for nonlinear(in parameters) models

Reimplemented from TVirtualFitter.

Definition at line 119 of file TFitter.cxx.

◆ GetConfidenceIntervals() [2/2]

void TFitter::GetConfidenceIntervals ( TObject obj,
Double_t  cl = 0.95 
)
overridevirtual

Computes confidence intervals at level cl.

Default is 0.95

The TObject parameter can be a TGraphErrors, a TGraph2DErrors or a TH1,2,3. For Graphs, confidence intervals are computed for each point, the value of the graph at that point is set to the function value at that point, and the graph y-errors (or z-errors) are set to the value of the confidence interval at that point. For Histograms, confidence intervals are computed for each bin center The bin content of this bin is then set to the function value at the bin center, and the bin error is set to the confidence interval value. NOTE: confidence intervals are approximate for nonlinear models!

Allowed combinations:

Reimplemented from TVirtualFitter.

Definition at line 229 of file TFitter.cxx.

◆ GetCovarianceMatrix()

Double_t * TFitter::GetCovarianceMatrix ( ) const
overridevirtual

return a pointer to the covariance matrix

Implements TVirtualFitter.

Definition at line 379 of file TFitter.cxx.

◆ GetCovarianceMatrixElement()

Double_t TFitter::GetCovarianceMatrixElement ( Int_t  i,
Int_t  j 
) const
overridevirtual

return element i,j from the covariance matrix

Implements TVirtualFitter.

Definition at line 391 of file TFitter.cxx.

◆ GetErrors()

Int_t TFitter::GetErrors ( Int_t  ipar,
Double_t eplus,
Double_t eminus,
Double_t eparab,
Double_t globcc 
) const
overridevirtual

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

Implements TVirtualFitter.

Definition at line 410 of file TFitter.cxx.

◆ GetMinuit()

TMinuit * TFitter::GetMinuit ( ) const
inline

Definition at line 46 of file TFitter.h.

◆ GetNumberFreeParameters()

Int_t TFitter::GetNumberFreeParameters ( ) const
overridevirtual

return the number of free parameters

Implements TVirtualFitter.

Definition at line 430 of file TFitter.cxx.

◆ GetNumberTotalParameters()

Int_t TFitter::GetNumberTotalParameters ( ) const
overridevirtual

return the total number of parameters (free + fixed)

Implements TVirtualFitter.

Definition at line 422 of file TFitter.cxx.

◆ GetParameter() [1/2]

Double_t TFitter::GetParameter ( Int_t  ipar) const
overridevirtual

return current value of parameter ipar

Implements TVirtualFitter.

Definition at line 453 of file TFitter.cxx.

◆ GetParameter() [2/2]

Int_t TFitter::GetParameter ( Int_t  ipar,
char *  parname,
Double_t value,
Double_t verr,
Double_t vlow,
Double_t vhigh 
) const
overridevirtual

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 dimensioned in the calling function.

Implements TVirtualFitter.

Definition at line 475 of file TFitter.cxx.

◆ GetParError()

Double_t TFitter::GetParError ( Int_t  ipar) const
overridevirtual

return error of parameter ipar

Implements TVirtualFitter.

Definition at line 439 of file TFitter.cxx.

◆ GetParName()

const char * TFitter::GetParName ( Int_t  ipar) const
overridevirtual

return name of parameter ipar

Implements TVirtualFitter.

Definition at line 487 of file TFitter.cxx.

◆ GetStats()

Int_t TFitter::GetStats ( Double_t amin,
Double_t edm,
Double_t errdef,
Int_t nvpar,
Int_t nparx 
) const
overridevirtual

return global fit parameters

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

Implements TVirtualFitter.

Definition at line 502 of file TFitter.cxx.

◆ GetSumLog()

Double_t TFitter::GetSumLog ( Int_t  i)
overridevirtual

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

Implements TVirtualFitter.

Definition at line 513 of file TFitter.cxx.

◆ IsA()

TClass * TFitter::IsA ( ) const
inlineoverridevirtual
Returns
TClass describing current object

Reimplemented from TObject.

Definition at line 62 of file TFitter.h.

◆ IsFixed()

Bool_t TFitter::IsFixed ( Int_t  ipar) const
overridevirtual

return kTRUE if parameter ipar is fixed, kFALSE otherwise)

Implements TVirtualFitter.

Definition at line 534 of file TFitter.cxx.

◆ operator=()

TFitter & TFitter::operator= ( const TFitter )
private

◆ PrintResults()

void TFitter::PrintResults ( Int_t  level,
Double_t  amin 
) const
overridevirtual

Print fit results.

Implements TVirtualFitter.

Definition at line 544 of file TFitter.cxx.

◆ ReleaseParameter()

void TFitter::ReleaseParameter ( Int_t  ipar)
overridevirtual

Release parameter ipar.

Implements TVirtualFitter.

Definition at line 552 of file TFitter.cxx.

◆ SetFCN()

void TFitter::SetFCN ( void(*)(Int_t &, Double_t *, Double_t &f, Double_t *, Int_t fcn)
overridevirtual

Specify the address of the fitting algorithm.

Reimplemented from TVirtualFitter.

Definition at line 561 of file TFitter.cxx.

◆ SetFitMethod()

void TFitter::SetFitMethod ( const char *  name)
overridevirtual

ret fit method (chisquare or log-likelihood)

Implements TVirtualFitter.

Definition at line 571 of file TFitter.cxx.

◆ SetParameter()

Int_t TFitter::SetParameter ( Int_t  ipar,
const char *  parname,
Double_t  value,
Double_t  verr,
Double_t  vlow,
Double_t  vhigh 
)
overridevirtual

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

Implements TVirtualFitter.

Definition at line 588 of file TFitter.cxx.

◆ Streamer()

void TFitter::Streamer ( TBuffer R__b)
overridevirtual

Stream an object of class TObject.

Reimplemented from TObject.

◆ StreamerNVirtual()

void TFitter::StreamerNVirtual ( TBuffer ClassDef_StreamerNVirtual_b)
inline

Definition at line 62 of file TFitter.h.

Member Data Documentation

◆ fCovar

Double_t* TFitter::fCovar
private

Definition at line 23 of file TFitter.h.

◆ fMinuit

TMinuit* TFitter::fMinuit
private

Definition at line 25 of file TFitter.h.

◆ fNlog

Int_t TFitter::fNlog
private

Definition at line 22 of file TFitter.h.

◆ fSumLog

Double_t* TFitter::fSumLog
private

Definition at line 24 of file TFitter.h.

Libraries for TFitter:

The documentation for this class was generated from the following files: