 ROOT   6.08/07 Reference Guide

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
• *sin(x) + *exp(-*x)
• x + y**2
• x^2 + y^2
• *pow(,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 *exp(-0.5*((x-)/)**2) and (0) means start numbering parameters at 0
• gausn(0) is a substitute for *exp(-0.5*((x-)/)**2)/(sqrt(2*pi)*)) and (0) means start numbering parameters at 0
• expo(3) is a substitute for exp(+*x
• pol3(5) is a substitute for par+par*x+par*x**2+par*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,x,x,x,....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 TObjectGetLinearPart (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_tGetParameters () 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

TFormulaoperator= (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 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 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 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...

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 TObjectDrawClone (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 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...

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...

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, 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_tfConsts

TString fFormula

std::list< TFormulaFunctionfFuncs

std::map< TString, TStringfFunctionsShortcuts

std::vector< TObject * > fLinearParts

Int_t fNdim

Int_t fNpar

Int_t fNumber

std::map< TString, Int_t, TFormulaParamOrderfParams
list of variable names More...

std::map< TString, TFormulaVariablefVars 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

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_tfClingParameters
cached variables More...

std::vector< Double_tfClingVariables
input function passed to Cling More...

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

voidfLambdaPtr
function pointer More...

TMethodCallfMethod 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]

## ◆ anonymous enum

 anonymous enum
Enumerator
kNotGlobal
kNormalized
kLinear
kLambda

Definition at line 147 of file TFormula.h.

## ◆ 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

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

Definition at line 161 of file TFormula.h.

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

Definition at line 2013 of file TFormula.cxx.

 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.

 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.

 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

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 TFormula::fClingParameters
private

cached variables

Definition at line 97 of file TFormula.h.

## ◆ fClingVariables

 std::vector TFormula::fClingVariables
private

input function passed to Cling

Definition at line 96 of file TFormula.h.

## ◆ fConsts

 std::map 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 TFormula::fFuncs
protected

Definition at line 118 of file TFormula.h.

## ◆ fFunctionsShortcuts

 std::map 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 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 TFormula::fParams
protected

list of variable names

Definition at line 120 of file TFormula.h.