The F O R M U L A class.

This is a new version of the TFormula class based on Cling. This class is not 100% backward compatible with the old TFOrmula class, which is still available in ROOT as ROOT::v5::TFormula. Some of the TFormula member funtions available in version 5, such as Analyze and AnalyzeFunction are not available in the new TFormula. On the other hand formula expressions which were valid in version 5 are still valid in TFormula version 6

This class has been implemented during Google Summer of Code 2013 by Maciej Zimnoch.

Example of valid expressions:

sin(x)/x
[0]*sin(x) + [1]*exp(-[2]*x)
x + y**2
x^2 + y^2
[0]*pow([1],4)
2*pi*sqrt(x/y)
gaus(0)*expo(3) + ypol3(5)*x
gausn(0)*expo(3) + ypol3(5)*x

In the last example above:

gaus(0) is a substitute for [0]*exp(-0.5*((x-[1])/[2])**2) and (0) means start numbering parameters at 0
gausn(0) is a substitute for [0]*exp(-0.5*((x-[1])/[2])**2)/(sqrt(2*pi)*[2])) and (0) means start numbering parameters at 0
expo(3) is a substitute for exp([3]+[4]*x
pol3(5) is a substitute for par[5]+par[6]*x+par[7]*x**2+par[8]*x**3 (PolN stands for Polynomial of degree N)

TMath functions can be part of the expression, eg:

TMath::Landau(x)*sin(x)
TMath::Erf(x)

Formula may contain constans, eg:

sqrt2
e
pi
ln10
infinity

and more.

Comparisons operators are also supported (&&, ||, ==, <=, >=, !)

Examples:

    `sin(x*(x<0.5 || x>1))`

If the result of a comparison is TRUE, the result is 1, otherwise 0.

Already predefined names can be given. For example, if the formula

 `TFormula old("old",sin(x*(x<0.5 || x>1)))`

one can assign a name to the formula. By default the name of the object = title = formula itself.

 `TFormula new("new","x*old")`

is equivalent to:

 `TFormula new("new","x*sin(x*(x&lt;0.5 || x&gt;1))")`

The class supports unlimited numer of variables and parameters. By default the names which can be used for the variables are x,y,z,t or x[0],x[1],x[2],x[3],....x[N] for N-dimensionals formula.

This class is not anymore the base class for the function classes TF1, but it has now adata member of TF1 which can be access via TF1::GetFormula.

Definition at line 89 of file TFormula.h.

Public Types
enum	{ kNotGlobal = BIT(10), kNormalized = BIT(14), kLinear = BIT(16), kLambda = BIT(17) }

Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

Public Member Functions
	TFormula ()

	TFormula (const char name, const char formula="", bool addToGlobList=true)

	TFormula (const char name, const char formula, int ndim, int npar, bool addToGlobList=true)
	constructor from a full compileable C++ expression More...

	TFormula (const TFormula &formula)

virtual	~TFormula ()

void	AddParameter (const TString &name, Double_t value=0)

void	AddVariable (const TString &name, Double_t value=0)

void	AddVariables (const TString *vars, const Int_t size)

virtual void	Clear (Option_t *option="")
	Set name and title to empty strings (""). More...

Int_t	Compile (const char *expression="")

virtual void	Copy (TObject &f1) const
	Copy this to obj. More...

Double_t	Eval (Double_t x) const

Double_t	Eval (Double_t x, Double_t y) const

Double_t	Eval (Double_t x, Double_t y, Double_t z) const

Double_t	Eval (Double_t x, Double_t y, Double_t z, Double_t t) const

Double_t	EvalPar (const Double_t x, const Double_t params=0) const

TString	GetExpFormula (Option_t *option="") const
	return the expression formula If option = "P" replace the parameter names with their values If option = "CLING" return the actual expression used to build the function passed to cling If option = "CLINGP" replace in the CLING expression the parameter with their values More...

const TObject *	GetLinearPart (Int_t i) const

Int_t	GetNdim () const

Int_t	GetNpar () const

Int_t	GetNumber () const

Double_t	GetParameter (const char *name) const

Double_t	GetParameter (Int_t param) const

Double_t *	GetParameters () const

void	GetParameters (Double_t *params) const

const char *	GetParName (Int_t ipar) const

Int_t	GetParNumber (const char *name) const

Double_t	GetVariable (const char *name) const

TString	GetVarName (Int_t ivar) const

Int_t	GetVarNumber (const char *name) const

Bool_t	IsLinear () const

Bool_t	IsValid () const

TFormula &	operator= (const TFormula &rhs)

void	Print (Option_t *option="") const
	print the formula and its attributes More...

void	SetName (const char *name)
	Set the name of the TNamed. More...

void	SetParameter (const char *name, Double_t value)

void	SetParameter (Int_t param, Double_t value)

void	SetParameters (const Double_t *params)

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)

void	SetParName (Int_t ipar, const char *name)

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")

void	SetVariable (const TString &name, Double_t value)

void	SetVariables (const std::pair< TString, Double_t > *vars, const Int_t size)

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TString &name, const TString &title)

	TNamed (const TNamed &named)
	TNamed copy ctor. More...

virtual	~TNamed ()

virtual TObject *	Clone (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	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...

TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator. 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...

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 TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current pad. 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 TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () 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_t *	GetOption () 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...

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...

Bool_t	IsOnHeap () const

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...

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. 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, Bool_t set)
	Set or unset the user status bits as specified in f. More...

void	SetBit (UInt_t f)

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...

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...

Protected Member Functions
void	DoAddParameter (const TString &name, Double_t value, bool processFormula)

Double_t	DoEval (const Double_t x, const Double_t p=nullptr) const

void	DoSetParameters (const Double_t *p, Int_t size)

void	ExtractFunctors (TString &formula)

Bool_t	PrepareFormula (TString &formula)

void	PreProcessFormula (TString &formula)

void	ProcessFormula (TString &formula)

void	ReplaceParamName (TString &formula, const TString &oldname, const TString &name)

void	SetPredefinedParamNames ()

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 ()

Static Protected Member Functions
static Bool_t	IsBracket (const char c)

static Bool_t	IsFunctionNameChar (const char c)

static Bool_t	IsHexadecimal (const TString &formula, int ipos)

static Bool_t	IsOperator (const char c)

static Bool_t	IsScientificNotation (const TString &formula, int ipos)

Protected Attributes
std::map< TString, Double_t >	fConsts

TString	fFormula

std::list< TFormulaFunction >	fFuncs

std::map< TString, TString >	fFunctionsShortcuts

std::vector< TObject * >	fLinearParts

Int_t	fNdim

Int_t	fNpar

Int_t	fNumber

std::map< TString, Int_t, TFormulaParamOrder >	fParams
	list of variable names More...

std::map< TString, TFormulaVariable >	fVars

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Private Member Functions
void	FillDefaults ()

void	HandleExponentiation (TString &formula)

void	HandleLinear (TString &formula)

void	HandleParametrizedFunctions (TString &formula)

void	HandlePolN (TString &formula)

Bool_t	InitLambdaExpression (const char *formula)

void	InputFormulaIntoCling ()
	pointer to the lambda function More...

Bool_t	PrepareEvalMethod ()

Static Private Member Functions
static Bool_t	IsDefaultVariableName (const TString &name)

Private Attributes
Bool_t	fAllParametersSetted
	transient to force re-initialization More...

Bool_t	fClingInitialized
	trasient to force initialization More...

TString	fClingInput

TString	fClingName
	pointer to methocall More...

std::vector< Double_t >	fClingParameters
	cached variables More...

std::vector< Double_t >	fClingVariables
	input function passed to Cling More...

TInterpreter::CallFuncIFacePtr_t::Generic_t	fFuncPtr
	unique name passed to Cling to define the function ( double clingName(doublex, doublep) ) More...

void *	fLambdaPtr
	function pointer More...

TMethodCall *	fMethod

Bool_t	fReadyToExecute

Additional Inherited Members
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...

#include "inc/TFormula.h"

Inheritance diagram for TFormula:

[legend]

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
kNotGlobal
kNormalized
kLinear
kLambda

Definition at line 147 of file TFormula.h.

Constructor & Destructor Documentation

◆ TFormula() [1/4]

TFormula::TFormula ( )

Definition at line 246 of file TFormula.cxx.

◆ ~TFormula()

TFormula::~TFormula ( )

virtual

Definition at line 274 of file TFormula.cxx.

◆ TFormula() [2/4]

TFormula::TFormula	(	const char *	name,
		const char *	formula = `""`,
		bool	addToGlobList = `true`
	)

Definition at line 294 of file TFormula.cxx.

◆ TFormula() [3/4]

TFormula::TFormula	(	const char *	name,
		const char *	formula,
		int	ndim,
		int	npar,
		bool	addToGlobList = `true`
	)

constructor from a full compileable C++ expression

Definition at line 335 of file TFormula.cxx.

◆ TFormula() [4/4]

TFormula::TFormula ( const TFormula & formula )

Definition at line 379 of file TFormula.cxx.

Member Function Documentation

◆ AddParameter()

void TFormula::AddParameter	(	const TString &	name,
		Double_t	value = `0`
	)

inline

Definition at line 161 of file TFormula.h.

◆ AddVariable()

void TFormula::AddVariable	(	const TString &	name,
		Double_t	value = `0`
	)

Definition at line 2013 of file TFormula.cxx.

◆ AddVariables()

void TFormula::AddVariables	(	const TString *	vars,
		const Int_t	size
	)

Definition at line 2048 of file TFormula.cxx.

◆ Clear()

void TFormula::Clear ( Option_t * option = "" )

virtual

Set name and title to empty strings ("").

Reimplemented from TNamed.

Definition at line 593 of file TFormula.cxx.

◆ Compile()

Int_t TFormula::Compile ( const char * expression = "" )

Definition at line 481 of file TFormula.cxx.

◆ Copy()

void TFormula::Copy ( TObject & named ) const

virtual

Copy this to obj.

Reimplemented from TNamed.

Definition at line 520 of file TFormula.cxx.

◆ DoAddParameter()

void TFormula::DoAddParameter	(	const TString &	name,
		Double_t	value,
		bool	processFormula
	)

protected

Definition at line 2200 of file TFormula.cxx.

◆ DoEval()

Double_t TFormula::DoEval	(	const Double_t *	x,
		const Double_t *	p = `nullptr`
	)		const

protected

Definition at line 2578 of file TFormula.cxx.

◆ DoSetParameters()

void TFormula::DoSetParameters	(	const Double_t *	p,
		Int_t	size
	)

protected

Definition at line 2415 of file TFormula.cxx.

◆ Eval() [1/4]

Double_t TFormula::Eval ( Double_t x ) const

Definition at line 2569 of file TFormula.cxx.

◆ Eval() [2/4]

Double_t TFormula::Eval	(	Double_t	x,
		Double_t	y
	)		const

Definition at line 2561 of file TFormula.cxx.

◆ Eval() [3/4]

Double_t TFormula::Eval	(	Double_t	x,
		Double_t	y,
		Double_t	z
	)		const

Definition at line 2553 of file TFormula.cxx.

◆ Eval() [4/4]

Double_t TFormula::Eval	(	Double_t	x,
		Double_t	y,
		Double_t	z,
		Double_t	t
	)		const

Definition at line 2545 of file TFormula.cxx.

◆ EvalPar()

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

Definition at line 2540 of file TFormula.cxx.

◆ ExtractFunctors()

void TFormula::ExtractFunctors ( TString & formula )

protected

Definition at line 1362 of file TFormula.cxx.

◆ FillDefaults()

void TFormula::FillDefaults ( )

private

Definition at line 692 of file TFormula.cxx.

◆ GetExpFormula()

TString TFormula::GetExpFormula ( Option_t * option = "" ) const

return the expression formula If option = "P" replace the parameter names with their values If option = "CLING" return the actual expression used to build the function passed to cling If option = "CLINGP" replace in the CLING expression the parameter with their values

Definition at line 2641 of file TFormula.cxx.

◆ GetLinearPart()

const TObject * TFormula::GetLinearPart ( Int_t i ) const

Definition at line 1999 of file TFormula.cxx.

◆ GetNdim()

Int_t TFormula::GetNdim ( ) const

inline

Definition at line 174 of file TFormula.h.

◆ GetNpar()

Int_t TFormula::GetNpar ( ) const

inline

Definition at line 175 of file TFormula.h.

◆ GetNumber()

Int_t TFormula::GetNumber ( ) const

inline

Definition at line 176 of file TFormula.h.

◆ GetParameter() [1/2]

Double_t TFormula::GetParameter ( const char * name ) const

Definition at line 2294 of file TFormula.cxx.

◆ GetParameter() [2/2]

Double_t TFormula::GetParameter ( Int_t param ) const

Definition at line 2307 of file TFormula.cxx.

◆ GetParameters() [1/2]

Double_t * TFormula::GetParameters ( ) const

Definition at line 2334 of file TFormula.cxx.

◆ GetParameters() [2/2]

void TFormula::GetParameters ( Double_t * params ) const

Definition at line 2341 of file TFormula.cxx.

◆ GetParName()

const char * TFormula::GetParName ( Int_t ipar ) const

Definition at line 2319 of file TFormula.cxx.

◆ GetParNumber()

Int_t TFormula::GetParNumber ( const char * name ) const

Definition at line 2282 of file TFormula.cxx.

◆ GetVariable()

Double_t TFormula::GetVariable ( const char * name ) const

Definition at line 2142 of file TFormula.cxx.

◆ GetVarName()

TString TFormula::GetVarName ( Int_t ivar ) const

Definition at line 2169 of file TFormula.cxx.

◆ GetVarNumber()

Int_t TFormula::GetVarNumber ( const char * name ) const

Definition at line 2155 of file TFormula.cxx.

◆ HandleExponentiation()

void TFormula::HandleExponentiation ( TString & formula )

private

Definition at line 1161 of file TFormula.cxx.

◆ HandleLinear()

void TFormula::HandleLinear ( TString & formula )

private

Definition at line 1261 of file TFormula.cxx.

◆ HandleParametrizedFunctions()

void TFormula::HandleParametrizedFunctions ( TString & formula )

private

Definition at line 891 of file TFormula.cxx.

◆ HandlePolN()

void TFormula::HandlePolN ( TString & formula )

private

Definition at line 790 of file TFormula.cxx.

◆ InitLambdaExpression()

Bool_t TFormula::InitLambdaExpression ( const char * formula )

private

Definition at line 444 of file TFormula.cxx.

◆ InputFormulaIntoCling()

void TFormula::InputFormulaIntoCling ( )

private

pointer to the lambda function

Definition at line 681 of file TFormula.cxx.

◆ IsBracket()

Bool_t TFormula::IsBracket ( const char c )

staticprotected

Definition at line 162 of file TFormula.cxx.

◆ IsDefaultVariableName()

Bool_t TFormula::IsDefaultVariableName ( const TString & name )

staticprivate

Definition at line 177 of file TFormula.cxx.

◆ IsFunctionNameChar()

Bool_t TFormula::IsFunctionNameChar ( const char c )

staticprotected

Definition at line 172 of file TFormula.cxx.

◆ IsHexadecimal()

Bool_t TFormula::IsHexadecimal	(	const TString &	formula,
		int	ipos
	)

staticprotected

Definition at line 194 of file TFormula.cxx.

◆ IsLinear()

Bool_t TFormula::IsLinear ( ) const

inline

Definition at line 187 of file TFormula.h.

◆ IsOperator()

Bool_t TFormula::IsOperator ( const char c )

staticprotected

Definition at line 151 of file TFormula.cxx.

◆ IsScientificNotation()

Bool_t TFormula::IsScientificNotation	(	const TString &	formula,
		int	ipos
	)

staticprotected

Definition at line 183 of file TFormula.cxx.

◆ IsValid()

Bool_t TFormula::IsValid ( ) const

inline

Definition at line 186 of file TFormula.h.

◆ operator=()

TFormula & TFormula::operator= ( const TFormula & rhs )

Definition at line 432 of file TFormula.cxx.

◆ PrepareEvalMethod()

bool TFormula::PrepareEvalMethod ( )

private

Definition at line 625 of file TFormula.cxx.

◆ PrepareFormula()

Bool_t TFormula::PrepareFormula ( TString & formula )

protected

Definition at line 1331 of file TFormula.cxx.

◆ PreProcessFormula()

void TFormula::PreProcessFormula ( TString & formula )

protected

Definition at line 1309 of file TFormula.cxx.

◆ Print()

void TFormula::Print ( Option_t * option = "" ) const

virtual

print the formula and its attributes

Reimplemented from TNamed.

Definition at line 2713 of file TFormula.cxx.

◆ ProcessFormula()

void TFormula::ProcessFormula ( TString & formula )

protected

Definition at line 1580 of file TFormula.cxx.

◆ ReplaceParamName()

void TFormula::ReplaceParamName	(	TString &	formula,
		const TString &	oldname,
		const TString &	name
	)

protected

Definition at line 2512 of file TFormula.cxx.

◆ SetName()

void TFormula::SetName ( const char * name )

virtual

Set the name of the TNamed.

WARNING: if the object is a member of a THashTable or THashList container the container must be Rehash()'ed after SetName(). For example the list of objects in the current directory is a THashList.

Reimplemented from TNamed.

Definition at line 2096 of file TFormula.cxx.

◆ SetParameter() [1/2]

void TFormula::SetParameter	(	const char *	name,
		Double_t	value
	)

Definition at line 2352 of file TFormula.cxx.

◆ SetParameter() [2/2]

void TFormula::SetParameter	(	Int_t	param,
		Double_t	value
	)

Definition at line 2458 of file TFormula.cxx.

◆ SetParameters() [1/2]

void TFormula::SetParameters ( const Double_t * params )

Definition at line 2432 of file TFormula.cxx.

◆ SetParameters() [2/2]

void TFormula::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`
	)

Definition at line 2439 of file TFormula.cxx.

◆ SetParName()

void TFormula::SetParName	(	Int_t	ipar,
		const char *	name
	)

Definition at line 2485 of file TFormula.cxx.

◆ SetParNames()

void TFormula::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"`
	)

Definition at line 2469 of file TFormula.cxx.

◆ SetPredefinedParamNames()

void TFormula::SetPredefinedParamNames ( )

protected

Definition at line 1930 of file TFormula.cxx.

◆ SetVariable()

void TFormula::SetVariable	(	const TString &	name,
		Double_t	value
	)

Definition at line 2186 of file TFormula.cxx.

◆ SetVariables()

void TFormula::SetVariables	(	const std::pair< TString, Double_t > *	vars,
		const Int_t	size
	)

Definition at line 2118 of file TFormula.cxx.

Member Data Documentation

◆ fAllParametersSetted

Bool_t TFormula::fAllParametersSetted

private

transient to force re-initialization

Definition at line 100 of file TFormula.h.

◆ fClingInitialized

Bool_t TFormula::fClingInitialized

private

trasient to force initialization

Definition at line 99 of file TFormula.h.

◆ fClingInput

TString TFormula::fClingInput

private

Definition at line 95 of file TFormula.h.

◆ fClingName

TString TFormula::fClingName

private

pointer to methocall

Definition at line 102 of file TFormula.h.

◆ fClingParameters

std::vector<Double_t> TFormula::fClingParameters

private

cached variables

Definition at line 97 of file TFormula.h.

◆ fClingVariables

std::vector<Double_t> TFormula::fClingVariables

private

input function passed to Cling

Definition at line 96 of file TFormula.h.

◆ fConsts

std::map<TString,Double_t> TFormula::fConsts

protected

Definition at line 121 of file TFormula.h.

◆ fFormula

TString TFormula::fFormula

protected

Definition at line 123 of file TFormula.h.

◆ fFuncPtr

TInterpreter::CallFuncIFacePtr_t::Generic_t TFormula::fFuncPtr

private

unique name passed to Cling to define the function ( double clingName(double*x, double*p) )

Definition at line 104 of file TFormula.h.

◆ fFuncs

std::list<TFormulaFunction> TFormula::fFuncs

protected

Definition at line 118 of file TFormula.h.

◆ fFunctionsShortcuts

std::map<TString,TString> TFormula::fFunctionsShortcuts

protected

Definition at line 122 of file TFormula.h.

◆ fLambdaPtr

void* TFormula::fLambdaPtr

private

function pointer

Definition at line 105 of file TFormula.h.

◆ fLinearParts

std::vector<TObject*> TFormula::fLinearParts

protected

Definition at line 127 of file TFormula.h.

◆ fMethod

TMethodCall* TFormula::fMethod

private

Definition at line 101 of file TFormula.h.

◆ fNdim

Int_t TFormula::fNdim

protected

Definition at line 124 of file TFormula.h.

◆ fNpar

Int_t TFormula::fNpar

protected

Definition at line 125 of file TFormula.h.

◆ fNumber

Int_t TFormula::fNumber

protected

Definition at line 126 of file TFormula.h.

◆ fParams

std::map<TString,Int_t,TFormulaParamOrder> TFormula::fParams

protected

list of variable names

Definition at line 120 of file TFormula.h.

◆ fReadyToExecute

Bool_t TFormula::fReadyToExecute

private

Definition at line 98 of file TFormula.h.

◆ fVars

std::map<TString,TFormulaVariable> TFormula::fVars

protected

Definition at line 119 of file TFormula.h.

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

hist/hist/inc/v5/TFormula.h
hist/hist/src/TFormula.cxx

Example of valid expressions:

Public Types

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Private Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ TFormula() [1/4]

◆ ~TFormula()

◆ TFormula() [2/4]

◆ TFormula() [3/4]

◆ TFormula() [4/4]

Member Function Documentation

◆ AddParameter()

◆ AddVariable()

◆ AddVariables()

◆ Clear()

◆ Compile()

◆ Copy()

◆ DoAddParameter()

◆ DoEval()

◆ DoSetParameters()

◆ Eval() [1/4]

◆ Eval() [2/4]

◆ Eval() [3/4]

◆ Eval() [4/4]

◆ EvalPar()

◆ ExtractFunctors()

◆ FillDefaults()

◆ GetExpFormula()

◆ GetLinearPart()

◆ GetNdim()

◆ GetNpar()

◆ GetNumber()

◆ GetParameter() [1/2]

◆ GetParameter() [2/2]

◆ GetParameters() [1/2]

◆ GetParameters() [2/2]

◆ GetParName()

◆ GetParNumber()

◆ GetVariable()

◆ GetVarName()

◆ GetVarNumber()

◆ HandleExponentiation()

◆ HandleLinear()

◆ HandleParametrizedFunctions()

◆ HandlePolN()

◆ InitLambdaExpression()

◆ InputFormulaIntoCling()

◆ IsBracket()

◆ IsDefaultVariableName()

◆ IsFunctionNameChar()

◆ IsHexadecimal()

◆ IsLinear()

◆ IsOperator()

◆ IsScientificNotation()

◆ IsValid()

◆ operator=()

◆ PrepareEvalMethod()

◆ PrepareFormula()

◆ PreProcessFormula()

◆ Print()

◆ ProcessFormula()

◆ ReplaceParamName()

◆ SetName()

◆ SetParameter() [1/2]

◆ SetParameter() [2/2]

◆ SetParameters() [1/2]

◆ SetParameters() [2/2]

◆ SetParName()

◆ SetParNames()

◆ SetPredefinedParamNames()

◆ SetVariable()

◆ SetVariables()