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Reference Guide
TFitResult Class Reference

Extends the ROOT::Fit::Result class with a TNamed inheritance providing easy possibility for I/O.

Definition at line 34 of file TFitResult.h.

Public Member Functions

 TFitResult (const char *name, const char *title)
 
 TFitResult (const ROOT::Fit::FitResult &f)
 Constructor from a ROOT::Fit::FitResult copy the contained TF1 pointer function if it is. More...
 
 TFitResult (int status=0)
 
virtual ~TFitResult ()
 
bool Contour (unsigned int ipar, unsigned int jpar, TGraph *gr, double confLevel=0.683)
 Create a 2D contour around the minimum for the parameter ipar and jpar if a minimum does not exist or is invalid it will return false on exit a TGraph is filled with the contour points the number of contour points is determined by the size of the TGraph. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. More...
 
double Error (unsigned int i) const
 
TMatrixDSym GetCorrelationMatrix () const
 Return the correlation matrix from fit. More...
 
TMatrixDSym GetCovarianceMatrix () const
 Return the covariance matrix from fit. More...
 
virtual void Print (Option_t *option="") const
 Print result of the fit, by default chi2, parameter values and errors. More...
 
bool Scan (unsigned int ipar, TGraph *gr, double xmin=0, double xmax=0)
 Scan parameter ipar between value of xmin and xmax A graph must be given which will be on return filled with the scan resul If the graph size is zero, a default size n = 40 will be used. More...
 
- Public Member Functions inherited from TNamed
 TNamed ()
 
 TNamed (const char *name, const char *title)
 
 TNamed (const TNamed &named)
 TNamed copy ctor. More...
 
 TNamed (const TString &name, const TString &title)
 
virtual ~TNamed ()
 TNamed destructor. More...
 
virtual void Clear (Option_t *option="")
 Set name and title to empty strings (""). More...
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility. More...
 
virtual Int_t Compare (const TObject *obj) const
 Compare two TNamed objects. More...
 
virtual void Copy (TObject &named) const
 Copy this to obj. More...
 
virtual void FillBuffer (char *&buffer)
 Encode TNamed into output buffer. More...
 
virtual const char * GetName () const
 Returns name of object. More...
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual ULong_t Hash () const
 Return hash value for this object. More...
 
virtual Bool_t IsSortable () const
 
virtual void ls (Option_t *option="") const
 List TNamed name and title. More...
 
TNamedoperator= (const TNamed &rhs)
 TNamed assignment operator. More...
 
virtual void SetName (const char *name)
 Set the name of the TNamed. More...
 
virtual void SetNameTitle (const char *name, const char *title)
 Set all the TNamed parameters (name and title). More...
 
virtual void SetTitle (const char *title="")
 Set the title of the TNamed. More...
 
virtual Int_t Sizeof () const
 Return size of the TNamed part of the TObject. More...
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. More...
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
virtual void Browse (TBrowser *b)
 Browse object. May be overridden for another default action. More...
 
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. More...
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs. More...
 
virtual void Delete (Option_t *option="")
 Delete this object. More...
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object. More...
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects. More...
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Dump () const
 Dump contents of object on stdout. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. More...
 
virtual void Execute (const char *method, const char *params, Int_t *error=0)
 Execute method on this object with the given parameter string, e.g. More...
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
 Execute method on this object with parameters stored in the TObjArray. More...
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py). More...
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
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. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. More...
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname". More...
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl. More...
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas. More...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
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). More...
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification. More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. More...
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself. More...
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list. More...
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory. More...
 
virtual void RecursiveRemove (TObject *obj)
 Recursively remove this object from a list. More...
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename. More...
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out". More...
 
void SetBit (UInt_t f)
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. More...
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object. More...
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id. More...
 
virtual void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
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. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory. More...
 
- Public Member Functions inherited from ROOT::Fit::FitResult
 FitResult ()
 Default constructor for an empty (non valid) fit result. More...
 
 FitResult (const FitConfig &fconfig)
 Constructor from a fit-config for a dummy fit (e.g. More...
 
 FitResult (const FitResult &rhs)
 Copy constructor. More...
 
virtual ~FitResult ()
 Destructor. More...
 
double Chi2 () const
 Chi2 fit value in case of likelihood must be computed ? More...
 
bool Contour (unsigned int ipar, unsigned int jpar, unsigned int &npoints, double *pntsx, double *pntsy, double confLevel=0.683)
 create contour of two parameters around the minimum pass as option confidence level: default is a value of 0.683 More...
 
double Correlation (unsigned int i, unsigned int j) const
 retrieve correlation elements More...
 
double CovMatrix (unsigned int i, unsigned int j) const
 retrieve covariance matrix element More...
 
int CovMatrixStatus () const
 covariance matrix status code using Minuit convention : =0 not calculated, =1 approximated, =2 made pos def , =3 accurate More...
 
double Edm () const
 Expected distance from minimum. More...
 
double Error (unsigned int i) const
 parameter error by index More...
 
const std::vector< double > & Errors () const
 parameter errors (return st::vector) More...
 
void FillResult (const std::shared_ptr< ROOT::Math::Minimizer > &min, const FitConfig &fconfig, const std::shared_ptr< IModelFunction > &f, bool isValid, unsigned int sizeOfData=0, bool binFit=true, const ROOT::Math::IMultiGenFunction *chi2func=0, unsigned int ncalls=0)
 Fill the fit result from a Minimizer instance after fitting Run also Minos if requested from the configuration. More...
 
const BinDataFittedBinData () const
 return BinData used in the fit (return a nullptr in case a different fit is done or the data are not available Pointer is managed internally, it must not be deleted More...
 
const IModelFunctionFittedFunction () const
 fitting quantities More...
 
void GetConfidenceIntervals (const BinData &data, double *ci, double cl=0.95, bool norm=false) const
 evaluate confidence interval for the point specified in the passed data sets the confidence interval are returned in the array ci cl is the desired confidence interval value. More...
 
std::vector< doubleGetConfidenceIntervals (double cl=0.95, bool norm=false) const
 evaluate confidence interval for the data set used in the last fit the confidence interval are returned as a vector of data points More...
 
void GetConfidenceIntervals (unsigned int n, unsigned int stride1, unsigned int stride2, const double *x, double *ci, double cl=0.95, bool norm=false) const
 get confidence intervals for an array of n points x. More...
 
template<class Matrix >
void GetCorrelationMatrix (Matrix &mat) const
 fill a correlation matrix elements using a generic symmetric matrix class implementing operator(i,j) the matrix must be previously allocates with right size (npar * npar) More...
 
template<class Matrix >
void GetCovarianceMatrix (Matrix &mat) const
 fill covariance matrix elements using a generic matrix class implementing operator(i,j) the matrix must be previously allocates with right size (npar * npar) More...
 
const doubleGetErrors () const
 parameter errors (return const pointer) More...
 
std::string GetParameterName (unsigned int ipar) const
 get name of parameter (deprecated) More...
 
const doubleGetParams () const
 parameter values (return const pointer) More...
 
double GlobalCC (unsigned int i) const
 parameter global correlation coefficient More...
 
bool HasMinosError (unsigned int i) const
 query if parameter i has the Minos error More...
 
int Index (const std::string &name) const
 get index for parameter name (return -1 if not found) More...
 
bool IsEmpty () const
 True if a fit result does not exist (even invalid) with parameter values. More...
 
bool IsParameterBound (unsigned int ipar) const
 query if a parameter is bound More...
 
bool IsParameterFixed (unsigned int ipar) const
 query if a parameter is fixed More...
 
bool IsValid () const
 True if fit successful, otherwise false. More...
 
double LowerError (unsigned int i) const
 lower Minos error. If Minos has not run for parameter i return the parabolic error More...
 
double MinFcnValue () const
 Return value of the objective function (chi2 or likelihood) used in the fit. More...
 
const std::string & MinimizerType () const
 minimization quantities More...
 
unsigned int NCalls () const
 Number of function calls to find minimum. More...
 
unsigned int Ndf () const
 Number of degree of freedom. More...
 
unsigned int NFreeParameters () const
 get total number of free parameters More...
 
bool NormalizedErrors () const
 flag to chek if errors are normalized More...
 
void NormalizeErrors ()
 normalize errors using chi2/ndf for chi2 fits More...
 
unsigned int NPar () const
 total number of parameters (abbreviation) More...
 
unsigned int NTotalParameters () const
 get total number of parameters More...
 
FitResultoperator= (const FitResult &rhs)
 Assignment operator. More...
 
double Parameter (unsigned int i) const
 parameter value by index More...
 
bool ParameterBounds (unsigned int ipar, double &lower, double &upper) const
 retrieve parameter bounds - return false if parameter is not bound More...
 
const std::vector< double > & Parameters () const
 parameter values (return std::vector) More...
 
double ParError (unsigned int i) const
 parameter error by index More...
 
std::string ParName (unsigned int i) const
 name of the parameter More...
 
void Print (std::ostream &os, bool covmat=false) const
 print the result and optionaly covariance matrix and correlations More...
 
void PrintCovMatrix (std::ostream &os) const
 print error matrix and correlations More...
 
double Prob () const
 p value of the fit (chi2 probability) More...
 
bool Scan (unsigned int ipar, unsigned int &npoints, double *pntsx, double *pntsy, double xmin=0, double xmax=0)
 scan likelihood value of parameter and fill the given graph. More...
 
void SetMinosError (unsigned int i, double elow, double eup)
 set the Minos errors for parameter i (called by the Fitter class when running Minos) More...
 
int Status () const
 minimizer status code More...
 
bool Update (const std::shared_ptr< ROOT::Math::Minimizer > &min, const ROOT::Fit::FitConfig &fconfig, bool isValid, unsigned int ncalls=0)
 Update the fit result with a new minimization status To be run only if same fit is performed with same configuration Note that in this case MINOS is not re-run. More...
 
double UpperError (unsigned int i) const
 upper Minos error. If Minos has not run for parameter i return the parabolic error More...
 
double Value (unsigned int i) const
 parameter value by index More...
 

Additional Inherited Members

- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kInconsistent = 0x08000000,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
 
enum  EStatusBits {
  kCanDelete = BIT(0), kMustCleanup = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5),
  kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13)
}
 
- Public Types inherited from ROOT::Fit::FitResult
typedef ROOT::Math::IParamMultiFunction IModelFunction
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 
- 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). More...
 
void MakeZombie ()
 
- Protected Member Functions inherited from ROOT::Fit::FitResult
std::shared_ptr< IModelFunctionModelFunction ()
 Return pointer non const pointer to model (fit) function with fitted parameter values. More...
 
void SetModelFunction (const std::shared_ptr< IModelFunction > &func)
 
- Protected Attributes inherited from TNamed
TString fName
 
TString fTitle
 
- Protected Attributes inherited from ROOT::Fit::FitResult
std::map< unsigned int, unsigned intfBoundParams
 
double fChi2
 
std::vector< doublefCovMatrix
 
int fCovStatus
 
double fEdm
 
std::vector< doublefErrors
 
std::shared_ptr< FitDatafFitData
 model function resulting from the fit. More...
 
std::shared_ptr< IModelFunctionfFitFunc
 objective function used for fitting More...
 
std::map< unsigned int, boolfFixedParams
 data set used in the fit More...
 
std::vector< doublefGlobalCC
 
std::shared_ptr< ROOT::Math::MinimizerfMinimizer
 
std::string fMinimType
 
std::map< unsigned int, std::pair< double, double > > fMinosErrors
 
unsigned int fNCalls
 
unsigned int fNdf
 
unsigned int fNFree
 
bool fNormalized
 
std::shared_ptr< ROOT::Math::IMultiGenFunctionfObjFunc
 minimizer object used for fitting More...
 
std::vector< std::pair< double, double > > fParamBounds
 
std::vector< doublefParams
 
std::vector< std::string > fParNames
 
int fStatus
 
double fVal
 
bool fValid
 

#include <TFitResult.h>

Inheritance diagram for TFitResult:
[legend]

Constructor & Destructor Documentation

◆ TFitResult() [1/3]

TFitResult::TFitResult ( int  status = 0)
inline

Definition at line 39 of file TFitResult.h.

◆ TFitResult() [2/3]

TFitResult::TFitResult ( const char *  name,
const char *  title 
)
inline

Definition at line 45 of file TFitResult.h.

◆ TFitResult() [3/3]

TFitResult::TFitResult ( const ROOT::Fit::FitResult f)

Constructor from a ROOT::Fit::FitResult copy the contained TF1 pointer function if it is.

Definition at line 31 of file TFitResult.cxx.

◆ ~TFitResult()

virtual TFitResult::~TFitResult ( )
inlinevirtual

Definition at line 53 of file TFitResult.h.

Member Function Documentation

◆ Contour()

bool TFitResult::Contour ( unsigned int  ipar,
unsigned int  jpar,
TGraph gr,
double  confLevel = 0.683 
)

Create a 2D contour around the minimum for the parameter ipar and jpar if a minimum does not exist or is invalid it will return false on exit a TGraph is filled with the contour points the number of contour points is determined by the size of the TGraph.

if the size is zero a default number of points = 20 is used pass optionally the confidence level, default is 0.683 it is assumed that ErrorDef() defines the right error definition (i.e 1 sigma error for one parameter). If not the confidence level are scaled to new level

Definition at line 119 of file TFitResult.cxx.

◆ Error() [1/2]

void TObject::Error

Issue error message.

Use "location" to specify the method where the error occurred. Accepts standard printf formatting arguments.

Definition at line 187 of file TObject.cxx.

◆ Error() [2/2]

double TFitResult::Error ( unsigned int  i) const
inline

Definition at line 74 of file TFitResult.h.

◆ GetCorrelationMatrix()

TMatrixDSym TFitResult::GetCorrelationMatrix ( ) const

Return the correlation matrix from fit.

The matrix is a symmetric matrix with a size N equal to the total number of parameters considered in the fit including the fixed ones The matrix row and columns corresponding to the fixed parameters will contain only zero's

Definition at line 77 of file TFitResult.cxx.

◆ GetCovarianceMatrix()

TMatrixDSym TFitResult::GetCovarianceMatrix ( ) const

Return the covariance matrix from fit.

The matrix is a symmetric matrix with a size N equal to the total number of parameters considered in the fit including the fixed ones The matrix row and columns corresponding to the fixed parameters will contain only zero's

Definition at line 59 of file TFitResult.cxx.

◆ Print()

void TFitResult::Print ( Option_t option = "") const
virtual

Print result of the fit, by default chi2, parameter values and errors.

if option "V" is given print also error matrix and correlation

Reimplemented from TNamed.

Definition at line 44 of file TFitResult.cxx.

◆ Scan()

bool TFitResult::Scan ( unsigned int  ipar,
TGraph gr,
double  xmin = 0,
double  xmax = 0 
)

Scan parameter ipar between value of xmin and xmax A graph must be given which will be on return filled with the scan resul If the graph size is zero, a default size n = 40 will be used.

Definition at line 93 of file TFitResult.cxx.

Libraries for TFitResult:
[legend]

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