Go4Fit
Class TGo4FitModelFormula

class TGo4FitModelFormula

derived from TGo4FitModel

Model object, which uses ROOT TFormula class facility.

Any kind of one-line expression can be analyzed by TFormula object and evaluated for given set of axis values and set of parameters. TGo4FitModelFormula in constructor creates additional parameters with names "Par0", "Par1" and so on, which can be used in equation and can be optimized. Optionally amplitude parameters with name "Ampl" can be created. In constructor expression, number of additional parameters and using of amplitude parameter should be specified. Fort instance, equation with 3 parameters and amplitude:

TGo4FitModelFormula *f = new TGo4FitModelFormula("Form","(x-Par0)*(y-Par1)*(z-Par2)", 3, kTRUE);

Fields inherited from class TNamed

fName, fTitle

Fields inherited from class Go4Fit.TGo4FitSlotList

fbUpdateSlotList, fxSlotList

Constructor Summary

TGo4FitModelFormula()           Default constructor

TGo4FitModelFormula(const char * iName, const char * iExpressionStr, Int_t iNPars, Bool_t AddAmplitude)           Create TGo4FitModelFormula object with given names.

Destructor Summary
virtual synchronized	~TGo4FitModelFormula()           Destroys TGo4FitModelFormula object.

Method Summary
virtual void	AfterEval()
virtual Bool_t	BeforeEval(Int_t ndim)
virtual Bool_t	CanAmplTouch()           Signals that ampltide parameter can be removed from or introdeced to object.
protected void	CloseFormula()
protected Bool_t	CompileFormula()
virtual Double_t	EvalN(const Double_t* v)
protected virtual void	Finalize()
const const char *	GetExpression()           Return formula expression.
protected TGo4FitParameter*	GetExprPar(Int_t n)
protected TString	GetExprParName(Int_t n)
Int_t	GetNumberOfExprPar()           Get number of parameters, which can be used in exprssion.
protected virtual Int_t	GetPosParIndex(Int_t naxis)
protected virtual Int_t	GetWidthParIndex(Int_t naxis)
protected virtual Bool_t	Initialize(Int_t UseBuffers)
virtual const void	Print(Option_t* option)           Print information on standard output.
void	SetExpression(const char * expr)           Sets formula expression.
Bool_t	SetNumberOfExprPar(Int_t num)           Sets number of parameters, which can be used in expression.
void	SetPosParIndex(Int_t naxis, Int_t indx)
void	SetWidthParIndex(Int_t naxis, Int_t indx)

Methods inherited from class Go4Fit.TGo4FitModel

AddModelToDataResult, AssignmentName, AssignToData, BuffersAllocated, ChangeDataNameInAssignments, ClearAssigmentTo, ClearAssignments, ClearAssignmentTo, ConnectToDataIfAssigned, Evaluate, Evaluate, Evaluate, Evaluate, EvaluateAndIntegrate, EvaluateAtPoint, EvaluateAtPoint, Get, GetAssignedConnection, GetDataFullIndex, GetDataIndexesSize, GetGroupIndex, GetModelBins, GetPosition, GetPosPar, GetRatioValueFor, GetWidth, GetWidthPar, Integral, IsAssignTo, NeedIntegration, NumAssigments, NumPars, RebuildShape, SetBackgroundGroupIndex, SetGroupIndex, SetIntegrationsProperty, SetNeedToRebuild, SetPosition, SetWidth, UserFunction

Methods inherited from class Go4Fit.TGo4FitComponent

AddRangeCondition, AddRangeCut, CheckRangeConditions, ClearRanges, CollectParsTo, ExcludeRange, GetAmplError, GetAmplFullName, GetAmplIndex, GetAmplName, GetAmplPar, GetAmplValue, GetNumRangeCondition, GetNumRangeCut, GetRangeCondition, GetRangeCut, GetRangeMax, GetRangeMin, GetUseBuffers, IsAnyRangeLimits, IsRangeCutExcluding, MakeAmpl, NewAmplitude, NewParameter, RemoveAmpl, RemoveRangeCondition, RemoveRangeCut, SetAmplError, SetAmplIndex, SetAmplValue, SetRange, SetRangeCondition, SetRangeCutExcluding, SetRangeMax, SetRangeMin, SetUseBuffers

Methods inherited from class Go4Fit.TGo4FitParsList

AddPar, CanRollbackPars, ClearPars, ClearParsBlocking, CreatePar, Find, Find, Find, FindPar, FindPar, FindPar, GetPar, GetParEpsilon, GetParError, GetParFixed, GetParFullName, GetParIndex, GetParName, GetParRange, GetParsValues, GetParValue, InsertPar, IsAllParsFixed, MemorizePars, NumFixedPars, NumFreePars, PrintPars, RememberPars, RemovePar, RemovePar, RemoveParByIndex, SetParEpsilon, SetParError, SetParFixed, SetParName, SetParRange, SetParsNames, SetParsOwner, SetParsValues, SetParsValues, SetParValue

Methods inherited from class Go4Fit.TGo4FitNamed

GetFullName, GetOwner, GetOwnerFullName, SetOwner

Methods inherited from class TNamed

operator=, Clear, Clone, Compare, Copy, FillBuffer, GetName, GetTitle, Hash, IsSortable, SetName, SetNameTitle, SetTitle, ls, Sizeof, Class, Class_Name, Class_Version, Dictionary, IsA, ShowMembers, Streamer, StreamerNVirtual, DeclFileName, ImplFileLine, ImplFileName, DeclFileLine

Methods inherited from class Go4Fit.TGo4FitSlotList

CheckDuplicatesOnSlot, CheckObjects, ClearObjects, ClearSlot, ConnectSlots, ConnectSlots, FillSlotList, FindSlot, GetSlot, GetSlotList, IsEmptySlots, IsObjectInSlots, NumSlots, PrepareSlotsForWriting, SetObject, SetObject, SetSaveFlagForObjects, SetUpdateSlotList

Field Detail

fiNDimension

private Int_t fiNDimension

temporary variable for formula calculation in EvalN() method.

protected TString fxExpression

String, containig formula expression.

protected TFormula* fxFormula

formula for evaluation expression in EvalN() method.

protected TArrayI fxPosIndex

protected TArrayI fxWidthIndex

public TGo4FitModelFormula()

Default constructor

public TGo4FitModelFormula(const char * iName, const char * iExpressionStr, Int_t iNPars, Bool_t AddAmplitude)

Create TGo4FitModelFormula object with given names.
Formula expression and number of parameters can be sets up. All using of amplitude parameter can be invoked.

public virtual synchronized ~TGo4FitModelFormula()

Destroys TGo4FitModelFormula object.

public virtual void AfterEval()

public virtual Bool_t BeforeEval(Int_t ndim)

public virtual Bool_t CanAmplTouch()

Signals that ampltide parameter can be removed from or introdeced to object.

protected void CloseFormula()

protected Bool_t CompileFormula()

public virtual Double_t EvalN(const Double_t* v)

protected virtual void Finalize()

public const const char * GetExpression()

Return formula expression.

protected TGo4FitParameter* GetExprPar(Int_t n)

protected TString GetExprParName(Int_t n)

public Int_t GetNumberOfExprPar()

Get number of parameters, which can be used in exprssion.

protected virtual Int_t GetPosParIndex(Int_t naxis)

protected virtual Int_t GetWidthParIndex(Int_t naxis)

protected virtual Bool_t Initialize(Int_t UseBuffers)

public virtual const void Print(Option_t* option)

Print information on standard output.

public void SetExpression(const char * expr)

Sets formula expression.

public Bool_t SetNumberOfExprPar(Int_t num)

Sets number of parameters, which can be used in expression.

public void SetPosParIndex(Int_t naxis, Int_t indx)

public void SetWidthParIndex(Int_t naxis, Int_t indx)

Association Links

to Class TArrayI

to Class TArrayI

to Class TFormula

formula for evaluation expression in EvalN() method.