TF12 Class Reference

A projection of a TF2 along X or Y.

It has the same behaviour as a TF1

Example of a function

TF2 *f2 = new TF2("f2","sin(x)*sin(y)/(x*y)",0,5,0,5);
TF12 *f12 = new TF12("f12",f2,0.1,"y");
f12->Draw();

Definition at line 25 of file TF12.h.

Public Member Functions
	TF12 ()
	TF12 default constructor.
	TF12 (const char *name, TF2 *f2, Double_t xy, Option_t *option="x")
	TF12 normal constructor.
	TF12 (const TF12 &f12)
	Copy constructor.
virtual	~TF12 ()
	F2 default destructor.
virtual void	Copy (TObject &f12) const
	Copy this F2 to a new F2.
virtual TF1 *	DrawCopy (Option_t *option="") const
	Draw a copy of this function with its current attributes.
virtual Double_t	Eval (Double_t x, Double_t y=0, Double_t z=0, Double_t t=0) const
	Evaluate this formula.
virtual Double_t	EvalPar (const Double_t *x, const Double_t *params=0)
	Evaluate this function at point x[0].
virtual Double_t	GetXY () const
virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save primitive as a C++ statement(s) on output stream out.
virtual void	SetXY (Double_t xy)
	Set the value of the constant for the TF2.
Public Member Functions inherited from TF1
	TF1 ()
	TF1 default constructor.
	TF1 (const char *name, const char *formula, Double_t xmin, Double_t xmax, Option_t *option)
	Same constructor as above (for TFormula based function) but passing an option strings available options VEC - vectorize the formula expressions (not possible for lambda based expressions) NL - function is not stores in the global list of functions GL - function will be always stored in the global list of functions , independently of the global setting of TF1::DefaultAddToGlobalList.
	TF1 (const char *name, const char *formula, Double_t xmin=0, Double_t xmax=1, EAddToList addToGlobList=EAddToList::kDefault, bool vectorize=false)
	F1 constructor using a formula definition.
template<class PtrObj , typename MemFn >
	TF1 (const char *name, const PtrObj &p, MemFn memFn, Double_t xmin, Double_t xmax, Int_t npar, const char *, const char *, EAddToList addToGlobList=EAddToList::kDefault)
template<class PtrObj , typename MemFn >
	TF1 (const char *name, const PtrObj &p, MemFn memFn, Double_t xmin, Double_t xmax, Int_t npar, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
	TF1 (const char *name, Double_t xmin, Double_t xmax, Int_t npar, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
	F1 constructor using name of an interpreted function.
	TF1 (const char *name, Double_t(*fcn)(const Double_t *, const Double_t *), Double_t xmin=0, Double_t xmax=1, Int_t npar=0, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
	Constructor using a pointer to real function.
	TF1 (const char *name, Double_t(*fcn)(Double_t *, Double_t *), Double_t xmin=0, Double_t xmax=1, Int_t npar=0, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
	Constructor using a pointer to a real function.
template<typename Func >
	TF1 (const char *name, Func f, Double_t xmin, Double_t xmax, Int_t npar, const char *, EAddToList addToGlobList=EAddToList::kDefault)
template<typename Func >
	TF1 (const char *name, Func f, Double_t xmin, Double_t xmax, Int_t npar, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
	TF1 (const char *name, ROOT::Math::ParamFunctor f, Double_t xmin=0, Double_t xmax=1, Int_t npar=0, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
	Constructor using the Functor class.
template<class T >
	TF1 (const char *name, std::function< T(const T *data, const Double_t *param)> &fcn, Double_t xmin=0, Double_t xmax=1, Int_t npar=0, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
template<class T >
	TF1 (const char *name, T(*fcn)(const T *, const Double_t *), Double_t xmin=0, Double_t xmax=1, Int_t npar=0, Int_t ndim=1, EAddToList addToGlobList=EAddToList::kDefault)
	Constructor using a pointer to function.
	TF1 (const TF1 &f1)
virtual	~TF1 ()
	TF1 default destructor.
virtual void	AddParameter (const TString &name, Double_t value)
virtual Bool_t	AddToGlobalList (Bool_t on=kTRUE)
	Add to global list of functions (gROOT->GetListOfFunctions() ) return previous status (true if the function was already in the list false if not)
virtual void	Browse (TBrowser *b)
	Browse.
virtual Double_t	CentralMoment (Double_t n, Double_t a, Double_t b, const Double_t *params=0, Double_t epsilon=0.000001)
	Return nth central moment of function between a and b (i.e the n-th moment around the mean value)
TObject *	Clone (const char *newname=0) const
	Make a complete copy of the underlying object.
virtual TH1 *	CreateHistogram ()
virtual Double_t	Derivative (Double_t x, Double_t *params=0, Double_t epsilon=0.001) const
	Returns the first derivative of the function at point x, computed by Richardson's extrapolation method (use 2 derivative estimates to compute a third, more accurate estimation) first, derivatives with steps h and h/2 are computed by central difference formulas.
virtual Double_t	Derivative2 (Double_t x, Double_t *params=0, Double_t epsilon=0.001) const
	Returns the second derivative of the function at point x, computed by Richardson's extrapolation method (use 2 derivative estimates to compute a third, more accurate estimation) first, derivatives with steps h and h/2 are computed by central difference formulas.
virtual Double_t	Derivative3 (Double_t x, Double_t *params=0, Double_t epsilon=0.001) const
	Returns the third derivative of the function at point x, computed by Richardson's extrapolation method (use 2 derivative estimates to compute a third, more accurate estimation) first, derivatives with steps h and h/2 are computed by central difference formulas.
virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Compute distance from point px,py to a function.
virtual void	Draw (Option_t *option="")
	Draw this function with its current attributes.
virtual TObject *	DrawDerivative (Option_t *option="al")
	Draw derivative of this function.
virtual void	DrawF1 (Double_t xmin, Double_t xmax, Option_t *option="")
	Draw function between xmin and xmax.
virtual TObject *	DrawIntegral (Option_t *option="al")
	Draw integral of this function.
template<class T >
T	EvalPar (const T *x, const Double_t *params=0)
	EvalPar for vectorized.
virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to one event.
virtual void	FixParameter (Int_t ipar, Double_t value)
	Fix the value of a parameter The specified value will be used in a fit operation.
Double_t	GetChisquare () const
virtual TString	GetExpFormula (Option_t *option="") const
virtual TFormula *	GetFormula ()
virtual const TFormula *	GetFormula () const
virtual TH1 *	GetHistogram () const
	Return a pointer to the histogram used to visualise the function Note that this histogram is managed by the function and in same case it is automatically deleted when some TF1 functions are called such as TF1::SetParameters, TF1::SetNpx, TF1::SetRange It is then reccomended either to clone the return object or calling again teh GetHistogram function whenever is needed.
virtual const TObject *	GetLinearPart (Int_t i) const
virtual Double_t	GetMaximum (Double_t xmin=0, Double_t xmax=0, Double_t epsilon=1.E-10, Int_t maxiter=100, Bool_t logx=false) const
	Returns the maximum value of the function.
virtual Double_t	GetMaximumStored () const
virtual Double_t	GetMaximumX (Double_t xmin=0, Double_t xmax=0, Double_t epsilon=1.E-10, Int_t maxiter=100, Bool_t logx=false) const
	Returns the X value corresponding to the maximum value of the function.
TMethodCall *	GetMethodCall () const
virtual Double_t	GetMinimum (Double_t xmin=0, Double_t xmax=0, Double_t epsilon=1.E-10, Int_t maxiter=100, Bool_t logx=false) const
	Returns the minimum value of the function on the (xmin, xmax) interval.
virtual Double_t	GetMinimumStored () const
virtual Double_t	GetMinimumX (Double_t xmin=0, Double_t xmax=0, Double_t epsilon=1.E-10, Int_t maxiter=100, Bool_t logx=false) const
	Returns the X value corresponding to the minimum value of the function on the (xmin, xmax) interval.
virtual Int_t	GetNDF () const
	Return the number of degrees of freedom in the fit the fNDF parameter has been previously computed during a fit.
virtual Int_t	GetNdim () const
virtual Int_t	GetNpar () const
virtual Int_t	GetNpx () const
virtual Int_t	GetNumber () const
virtual Int_t	GetNumberFitPoints () const
virtual Int_t	GetNumberFreeParameters () const
	Return the number of free parameters.
virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Redefines TObject::GetObjectInfo.
virtual Double_t	GetParameter (const TString &name) const
virtual Double_t	GetParameter (Int_t ipar) const
virtual Double_t *	GetParameters () const
virtual void	GetParameters (Double_t *params)
TObject *	GetParent () const
virtual Double_t	GetParError (Int_t ipar) const
	Return value of parameter number ipar.
virtual const Double_t *	GetParErrors () const
virtual void	GetParLimits (Int_t ipar, Double_t &parmin, Double_t &parmax) const
	Return limits for parameter ipar.
virtual const char *	GetParName (Int_t ipar) const
virtual Int_t	GetParNumber (const char *name) const
virtual Double_t	GetProb () const
	Return the fit probability.
virtual Int_t	GetQuantiles (Int_t nprobSum, Double_t *q, const Double_t *probSum)
	Compute Quantiles for density distribution of this function.
virtual Double_t	GetRandom (Double_t xmin, Double_t xmax, TRandom *rng=nullptr, Option_t *opt=nullptr)
	Return a random number following this function shape in [xmin,xmax].
virtual Double_t	GetRandom (TRandom *rng=nullptr, Option_t *opt=nullptr)
	Return a random number following this function shape.
virtual void	GetRange (Double_t &xmin, Double_t &xmax) const
	Return range of a 1-D function.
virtual void	GetRange (Double_t &xmin, Double_t &ymin, Double_t &xmax, Double_t &ymax) const
	Return range of a 2-D function.
virtual void	GetRange (Double_t &xmin, Double_t &ymin, Double_t &zmin, Double_t &xmax, Double_t &ymax, Double_t &zmax) const
	Return range of function.
virtual Double_t	GetSave (const Double_t *x)
	Get value corresponding to X in array of fSave values.
virtual Double_t	GetVariable (const TString &name)
virtual Double_t	GetX (Double_t y, Double_t xmin=0, Double_t xmax=0, Double_t epsilon=1.E-10, Int_t maxiter=100, Bool_t logx=false) const
	Returns the X value corresponding to the function value fy for (xmin<x<xmax).
TAxis *	GetXaxis () const
	Get x axis of the function.
virtual Double_t	GetXmax () const
virtual Double_t	GetXmin () const
TAxis *	GetYaxis () const
	Get y axis of the function.
TAxis *	GetZaxis () const
	Get z axis of the function. (In case this object is a TF2 or TF3)
virtual void	GradientPar (const Double_t *x, Double_t *grad, Double_t eps=0.01)
	Compute the gradient wrt parameters If the TF1 object is based on a formula expression (TFormula) and TFormula::GenerateGradientPar() has been successfully called automatic differentiation using CLAD is used instead of the default numerical differentiation.
template<class T >
void	GradientPar (const T *x, T *grad, Double_t eps=0.01)
virtual Double_t	GradientPar (Int_t ipar, const Double_t *x, Double_t eps=0.01)
	Compute the gradient (derivative) wrt a parameter ipar.
template<class T >
T	GradientPar (Int_t ipar, const T *x, Double_t eps=0.01)
template<class T >
void	GradientParTempl (const T *x, T *grad, Double_t eps=0.01)
template<class T >
T	GradientParTempl (Int_t ipar, const T *x, Double_t eps=0.01)
virtual void	InitArgs (const Double_t *x, const Double_t *params)
	Initialize parameters addresses.
virtual Double_t	Integral (Double_t a, Double_t b, Double_t epsrel=1.e-12)
	IntegralOneDim or analytical integral.
virtual Double_t	IntegralError (Double_t a, Double_t b, const Double_t *params=0, const Double_t *covmat=0, Double_t epsilon=1.E-2)
	Return Error on Integral of a parametric function between a and b due to the parameter uncertainties and their covariance matrix from the fit.
virtual Double_t	IntegralError (Int_t n, const Double_t *a, const Double_t *b, const Double_t *params=0, const Double_t *covmat=0, Double_t epsilon=1.E-2)
	Return Error on Integral of a parametric function with dimension larger than one between a[] and b[] due to the parameters uncertainties.
virtual Double_t	IntegralFast (Int_t num, Double_t *x, Double_t *w, Double_t a, Double_t b, Double_t *params=0, Double_t epsilon=1e-12)
	Gauss-Legendre integral, see CalcGaussLegendreSamplingPoints.
virtual Double_t	IntegralMultiple (Int_t n, const Double_t *a, const Double_t *b, Double_t epsrel, Double_t &relerr)
	See more general prototype below.
virtual Double_t	IntegralMultiple (Int_t n, const Double_t *a, const Double_t *b, Int_t maxpts, Double_t epsrel, Double_t epsabs, Double_t &relerr, Int_t &nfnevl, Int_t &ifail)
	This function computes, to an attempted specified accuracy, the value of the integral.
virtual Double_t	IntegralMultiple (Int_t n, const Double_t *a, const Double_t *b, Int_t, Int_t maxpts, Double_t epsrel, Double_t &relerr, Int_t &nfnevl, Int_t &ifail)
virtual Double_t	IntegralOneDim (Double_t a, Double_t b, Double_t epsrel, Double_t epsabs, Double_t &err)
	Return Integral of function between a and b using the given parameter values and relative and absolute tolerance.
virtual Bool_t	IsEvalNormalized () const
virtual Bool_t	IsInside (const Double_t *x) const
	return kTRUE if the point is inside the function range
virtual Bool_t	IsLinear () const
virtual Bool_t	IsValid () const
	Return kTRUE if the function is valid.
bool	IsVectorized ()
virtual Double_t	Mean (Double_t a, Double_t b, const Double_t *params=0, Double_t epsilon=0.000001)
virtual Double_t	Moment (Double_t n, Double_t a, Double_t b, const Double_t *params=0, Double_t epsilon=0.000001)
	Return nth moment of function between a and b.
template<class T >
T	operator() (const T *x, const Double_t *params=nullptr)
virtual Double_t	operator() (Double_t x, Double_t y=0, Double_t z=0, Double_t t=0) const
TF1 &	operator= (const TF1 &rhs)
	Operator =.
virtual void	Paint (Option_t *option="")
	Paint this function with its current attributes.
virtual void	Print (Option_t *option="") const
	Print TNamed name and title.
virtual void	ReleaseParameter (Int_t ipar)
	Release parameter number ipar If used in a fit, the parameter can vary freely.
virtual void	Save (Double_t xmin, Double_t xmax, Double_t ymin, Double_t ymax, Double_t zmin, Double_t zmax)
	Save values of function in array fSave.
virtual void	SetChisquare (Double_t chi2)
virtual void	SetFitResult (const ROOT::Fit::FitResult &result, const Int_t *indpar=0)
	Set the result from the fit parameter values, errors, chi2, etc... Optionally a pointer to a vector (with size fNpar) of the parameter indices in the FitResult can be passed This is useful in the case of a combined fit with different functions, and the FitResult contains the global result By default it is assume that indpar = {0,1,2,....,fNpar-1}.
template<typename Func >
void	SetFunction (Func f)
template<class PtrObj , typename MemFn >
void	SetFunction (PtrObj &p, MemFn memFn)
virtual void	SetMaximum (Double_t maximum=-1111)
	Set the maximum value along Y for this function In case the function is already drawn, set also the maximum in the helper histogram.
virtual void	SetMinimum (Double_t minimum=-1111)
	Set the minimum value along Y for this function In case the function is already drawn, set also the minimum in the helper histogram.
virtual void	SetNDF (Int_t ndf)
	Set the number of degrees of freedom ndf should be the number of points used in a fit - the number of free parameters.
virtual void	SetNormalized (Bool_t flag)
virtual void	SetNpx (Int_t npx=100)
	Set the number of points used to draw the function.
virtual void	SetNumberFitPoints (Int_t npfits)
virtual void	SetParameter (const TString &name, Double_t value)
virtual void	SetParameter (Int_t param, Double_t value)
virtual void	SetParameters (const Double_t *params)
virtual void	SetParameters (Double_t p0, Double_t p1, Double_t p2=0, Double_t p3=0, Double_t p4=0, Double_t p5=0, Double_t p6=0, Double_t p7=0, Double_t p8=0, Double_t p9=0, Double_t p10=0)
virtual void	SetParent (TObject *p=0)
virtual void	SetParError (Int_t ipar, Double_t error)
	Set error for parameter number ipar.
virtual void	SetParErrors (const Double_t *errors)
	Set errors for all active parameters when calling this function, the array errors must have at least fNpar values.
virtual void	SetParLimits (Int_t ipar, Double_t parmin, Double_t parmax)
	Set limits for parameter ipar.
virtual void	SetParName (Int_t ipar, const char *name)
	Set name of parameter number ipar.
virtual void	SetParNames (const char *name0="p0", const char *name1="p1", const char *name2="p2", const char *name3="p3", const char *name4="p4", const char *name5="p5", const char *name6="p6", const char *name7="p7", const char *name8="p8", const char *name9="p9", const char *name10="p10")
	Set up to 10 parameter names.
virtual void	SetRange (Double_t xmin, Double_t xmax)
	Initialize the upper and lower bounds to draw the function.
virtual void	SetRange (Double_t xmin, Double_t ymin, Double_t xmax, Double_t ymax)
virtual void	SetRange (Double_t xmin, Double_t ymin, Double_t zmin, Double_t xmax, Double_t ymax, Double_t zmax)
virtual void	SetSavedPoint (Int_t point, Double_t value)
	Restore value of function saved at point.
virtual void	SetTitle (const char *title="")
	Set function title if title has the form "fffffff;xxxx;yyyy", it is assumed that the function title is "fffffff" and "xxxx" and "yyyy" are the titles for the X and Y axis respectively.
virtual void	SetVectorized (Bool_t vectorized)
virtual void	Update ()
	Called by functions such as SetRange, SetNpx, SetParameters to force the deletion of the associated histogram or Integral.
virtual Double_t	Variance (Double_t a, Double_t b, const Double_t *params=0, Double_t epsilon=0.000001)
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.
virtual void	Clear (Option_t *option="")
	Set name and title to empty strings ("").
virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects.
virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.
virtual const char *	GetName () const
	Returns name of object.
virtual const char *	GetTitle () const
	Returns title of object.
virtual ULong_t	Hash () const
	Return hash value for this object.
virtual Bool_t	IsSortable () const
virtual void	ls (Option_t *option="") const
	List TNamed name and title.
TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator.
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 Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.
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.
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 void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.
virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad).
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=0)
	Execute method on this object with the given parameter string, e.g.
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray.
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message.
virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes.
virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes.
virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.
virtual const char *	GetIconName () const
	Returns mime type name of object.
virtual Option_t *	GetOption () 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)
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.
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)
	Operator delete [].
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)
TObject &	operator= (const TObject &rhs)
	TObject assignment operator.
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.
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.
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=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.
Public Member Functions inherited from TAttLine
	TAttLine ()
	AttLine default constructor.
	TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth)
	AttLine normal constructor.
virtual	~TAttLine ()
	AttLine destructor.
void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine.
Int_t	DistancetoLine (Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
	Compute distance from point px,py to a line.
virtual Color_t	GetLineColor () const
	Return the line color.
virtual Style_t	GetLineStyle () const
	Return the line style.
virtual Width_t	GetLineWidth () const
	Return the line width.
virtual void	Modify ()
	Change current line attributes if necessary.
virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values.
virtual void	SaveLineAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
	Save line attributes as C++ statement(s) on output stream out.
virtual void	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes.
virtual void	SetLineColor (Color_t lcolor)
	Set the line color.
virtual void	SetLineColorAlpha (Color_t lcolor, Float_t lalpha)
	Set a transparent line color.
virtual void	SetLineStyle (Style_t lstyle)
	Set the line style.
virtual void	SetLineWidth (Width_t lwidth)
	Set the line width.
Public Member Functions inherited from TAttFill
	TAttFill ()
	AttFill default constructor.
	TAttFill (Color_t fcolor, Style_t fstyle)
	AttFill normal constructor.
virtual	~TAttFill ()
	AttFill destructor.
void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill.
virtual Color_t	GetFillColor () const
	Return the fill area color.
virtual Style_t	GetFillStyle () const
	Return the fill area style.
virtual Bool_t	IsTransparent () const
virtual void	Modify ()
	Change current fill area attributes if necessary.
virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values.
virtual void	SaveFillAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
	Save fill attributes as C++ statement(s) on output stream out.
virtual void	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes.
virtual void	SetFillColor (Color_t fcolor)
	Set the fill area color.
virtual void	SetFillColorAlpha (Color_t fcolor, Float_t falpha)
	Set a transparent fill color.
virtual void	SetFillStyle (Style_t fstyle)
	Set the fill area style.
Public Member Functions inherited from TAttMarker
	TAttMarker ()
	TAttMarker default constructor.
	TAttMarker (Color_t color, Style_t style, Size_t msize)
	TAttMarker normal constructor.
virtual	~TAttMarker ()
	TAttMarker destructor.
void	Copy (TAttMarker &attmarker) const
	Copy this marker attributes to a new TAttMarker.
virtual Color_t	GetMarkerColor () const
	Return the marker color.
virtual Size_t	GetMarkerSize () const
	Return the marker size.
virtual Style_t	GetMarkerStyle () const
	Return the marker style.
virtual void	Modify ()
	Change current marker attributes if necessary.
virtual void	ResetAttMarker (Option_t *toption="")
	Reset this marker attributes to the default values.
virtual void	SaveMarkerAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t sizdef=1)
	Save line attributes as C++ statement(s) on output stream out.
virtual void	SetMarkerAttributes ()
	Invoke the DialogCanvas Marker attributes.
virtual void	SetMarkerColor (Color_t mcolor=1)
	Set the marker color.
virtual void	SetMarkerColorAlpha (Color_t mcolor, Float_t malpha)
	Set a transparent marker color.
virtual void	SetMarkerSize (Size_t msize=1)
	Set the marker size.
virtual void	SetMarkerStyle (Style_t mstyle=1)
	Set the marker style.

Protected Attributes
Int_t	fCase
TF2 *	fF2
Double_t	fXY
Protected Attributes inherited from TF1
std::vector< Double_t >	fAlpha
	Integral of function binned on fNpx bins.
std::vector< Double_t >	fBeta
	Array alpha. for each bin in x the deconvolution r of fIntegral.
Double_t	fChisquare {}
std::unique_ptr< TF1AbsComposition >	fComposition
std::unique_ptr< TFormula >	fFormula
	Functor object to wrap any C++ callable object.
std::unique_ptr< TF1FunctorPointer >	fFunctor
std::vector< Double_t >	fGamma
	Array beta. is approximated by x = alpha +beta*r *gamma*r**2.
TH1 *	fHistogram {nullptr}
	Parent object hooking this function (if one)
std::vector< Double_t >	fIntegral
Double_t	fMaximum {-1111}
std::unique_ptr< TMethodCall >	fMethodCall
	Pointer to histogram used for visualisation.
Double_t	fMinimum {-1111}
Int_t	fNDF {}
Int_t	fNdim {}
Bool_t	fNormalized {false}
	Pointer to MethodCall in case of interpreted function.
Double_t	fNormIntegral {}
Int_t	fNpar {}
Int_t	fNpfits {}
Int_t	fNpx {100}
std::unique_ptr< TF1Parameters >	fParams
TObject *	fParent {nullptr}
	Array gamma.
std::vector< Double_t >	fParErrors
std::vector< Double_t >	fParMax
std::vector< Double_t >	fParMin
std::vector< Double_t >	fSave
EFType	fType {EFType::kTemplScalar}
Double_t	fXmax {-1111}
Double_t	fXmin {-1111}
Protected Attributes inherited from TNamed
TString	fName
TString	fTitle
Protected Attributes inherited from TAttLine
Color_t	fLineColor
	Line color.
Style_t	fLineStyle
	Line style.
Width_t	fLineWidth
	Line width.
Protected Attributes inherited from TAttFill
Color_t	fFillColor
	Fill area color.
Style_t	fFillStyle
	Fill area style.
Protected Attributes inherited from TAttMarker
Color_t	fMarkerColor
	Marker color.
Size_t	fMarkerSize
	Marker size.
Style_t	fMarkerStyle
	Marker style.

Additional Inherited Members
Public Types inherited from TF1
enum class	EAddToList { kDefault , kAdd , kNo }
enum	EStatusBits { kNotGlobal = BIT(10) , kNotDraw = BIT(9) }
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) }
Static Public Member Functions inherited from TF1
static void	AbsValue (Bool_t reject=kTRUE)
	Static function: set the fgAbsValue flag.
static void	CalcGaussLegendreSamplingPoints (Int_t num, Double_t *x, Double_t *w, Double_t eps=3.0e-11)
	Type safe interface (static method) The number of sampling points are taken from the TGraph.
static Bool_t	DefaultAddToGlobalList (Bool_t on=kTRUE)
	Static method to add/avoid to add automatically functions to the global list (gROOT->GetListOfFunctions() ) After having called this static method, all the functions created afterwards will follow the desired behaviour.
static Double_t	DerivativeError ()
	Static function returning the error of the last call to the of Derivative's functions.
static TF1 *	GetCurrent ()
	Static function returning the current function being processed.
static void	InitStandardFunctions ()
	Create the basic function objects.
static Bool_t	RejectedPoint ()
	See TF1::RejectPoint above.
static void	RejectPoint (Bool_t reject=kTRUE)
	Static function to set the global flag to reject points the fgRejectPoint global flag is tested by all fit functions if TRUE the point is not included in the fit.
static void	SetCurrent (TF1 *f1)
	Static function setting the current function.
Static Public Member Functions inherited from TObject
static Long_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.
Static Public Member Functions inherited from TAttMarker
static Width_t	GetMarkerLineWidth (Style_t style)
	Internal helper function that returns the line width of the given marker style (0 = filled marker)
static Style_t	GetMarkerStyleBase (Style_t style)
	Internal helper function that returns the corresponding marker style with line width 1 for the given style.
Protected Types inherited from TF1
enum	EFType {   kFormula = 0 , kPtrScalarFreeFcn , kInterpreted , kTemplVec ,   kTemplScalar , kCompositionFcn }
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(3) }
Protected Member Functions inherited from TF1
	TF1 (EFType functionType, const char *name, Double_t xmin, Double_t xmax, Int_t npar, Int_t ndim, EAddToList addToGlobList, TF1Parameters *params=nullptr, TF1FunctorPointer *functor=nullptr)
	General constructor for TF1. Most of the other constructors delegate on it.
Bool_t	ComputeCdfTable (Option_t *opt)
	Compute the cumulative function at fNpx points between fXmin and fXmax.
virtual TH1 *	DoCreateHistogram (Double_t xmin, Double_t xmax, Bool_t recreate=kFALSE)
	Create histogram with bin content equal to function value computed at the bin center This histogram will be used to paint the function A re-creation is forced and a new histogram is done if recreate=true.
void	DoInitialize (EAddToList addToGlobList)
	Common initialization of the TF1.
virtual Double_t	GetMinMaxNDim (Double_t *x, Bool_t findmax, Double_t epsilon=0, Int_t maxiter=0) const
	Find the minimum of a function of whatever dimension.
virtual void	GetRange (Double_t *xmin, Double_t *xmax) const
	Return range of a generic N-D function.
void	IntegrateForNormalization ()
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 ()
Static Protected Attributes inherited from TF1
static std::atomic< Bool_t >	fgAbsValue
static std::atomic< Bool_t >	fgAddToGlobList
static TF1 *	fgCurrent = 0
static Bool_t	fgRejectPoint = kFALSE

#include <TF12.h>

Inheritance diagram for TF12:

Constructor & Destructor Documentation

TF12() [1/3]

TF12::TF12

(

)

TF12 default constructor.

Definition at line 37 of file TF12.cxx.

TF12() [2/3]

TF12::TF12	(	const char *	name,
		TF2 *	f2,
		Double_t	xy,
		Option_t *	option = "x"
	)

TF12 normal constructor.

Create a TF12 (special TF1) from a projection of a TF2 for a fix value of Y if option="X" or X if option="Y" This value may be changed at any time via TF12::SetXY(xy)

Definition at line 52 of file TF12.cxx.

TF12() [3/3]

TF12::TF12

(

const TF12 &

f12

)

Copy constructor.

Definition at line 87 of file TF12.cxx.

~TF12()

TF12::~TF12 ( )

virtual

F2 default destructor.

Definition at line 79 of file TF12.cxx.

Member Function Documentation

Copy()

void TF12::Copy ( TObject &  f12 ) const

virtual

Copy this F2 to a new F2.

Reimplemented from TF1.

Definition at line 96 of file TF12.cxx.

DrawCopy()

TF1 * TF12::DrawCopy ( Option_t *  option = "" ) const

virtual

Draw a copy of this function with its current attributes.

This function MUST be used instead of Draw when you want to draw the same function with different parameters settings in the same canvas.

Possible option values are:

option	description
"SAME"	superimpose on top of existing picture
"L"	connect all computed points with a straight line
"C"	connect all computed points with a smooth curve

Note that the default value is "F". Therefore to draw on top of an existing picture, specify option "SL"

Reimplemented from TF1.

Definition at line 122 of file TF12.cxx.

Eval()

Double_t TF12::Eval ( Double_t  x, Double_t  y = 0, Double_t  z = 0, Double_t  t = 0  ) const

virtual

Evaluate this formula.

Computes the value of the referenced TF2 for a fix value of X or Y

Reimplemented from TF1.

Definition at line 137 of file TF12.cxx.

EvalPar()

Double_t TF12::EvalPar ( const Double_t *  x, const Double_t *  params = 0  )

virtual

Evaluate this function at point x[0].

x[0] is the value along X if fCase =0, the value along Y if fCase=1 if params is non null, the array will be used instead of the internal TF2 parameters

Reimplemented from TF1.

Definition at line 155 of file TF12.cxx.

GetXY()

virtual Double_t TF12::GetXY ( ) const

inlinevirtual

Definition at line 47 of file TF12.h.

SavePrimitive()

void TF12::SavePrimitive ( std::ostream &  out, Option_t *  option = ""  )

virtual

Save primitive as a C++ statement(s) on output stream out.

Reimplemented from TF1.

Definition at line 174 of file TF12.cxx.

SetXY()

void TF12::SetXY ( Double_t  xy )

virtual

Set the value of the constant for the TF2.

constant in X when projecting along Y constant in Y when projecting along X The function title is set to include the value of the constant The current pad is updated

Definition at line 188 of file TF12.cxx.

Member Data Documentation

fCase

Int_t TF12::fCase

protected

Definition at line 29 of file TF12.h.

fF2

TF2* TF12::fF2

protected

Definition at line 30 of file TF12.h.

fXY

Double_t TF12::fXY

protected

Definition at line 28 of file TF12.h.

Libraries for TF12:

---

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

• hist/hist/inc/TF12.h
• hist/hist/src/TF12.cxx