TGo4FitModelPolynom Class Reference

Model objects, which reproduce component of polynomial function. More...

#include <TGo4FitModelPolynom.h>

Inheritance diagram for TGo4FitModelPolynom:


Public Member Functions
	TGo4FitModelPolynom ()
	Default constructor.
	TGo4FitModelPolynom (const char *iName, Double_t iOrderX=0.)
	Creates TGo4FitModelPolynom object with given name for 1-dim case.
	TGo4FitModelPolynom (const char *iName, Double_t iOrderX, Double_t iOrderY)
	Creates TGo4FitModelPolynom object with given name for 2-dim case.
	TGo4FitModelPolynom (const char *iName, Double_t iOrderX, Double_t iOrderY, Double_t iOrderZ)
	Creates TGo4FitModelPolynom object with given name for 3-dim case.
	TGo4FitModelPolynom (const char *iName, const TArrayD &iPolynomOrders)
	Creates TGo4FitModelPolynom object with given name for n-dim case.
virtual	~TGo4FitModelPolynom ()
	Destroys TGo4FitModelPolynom object.
Double_t	GetPolynomOrder (Int_t naxis)
	Get polynom order for specified axis.
Int_t	GetMaxNumAxis ()
	Returns maximum axis number (dimensions number) in polynom.
Bool_t	SetMaxNumAxis (Int_t numaxis)
	Sets number of dimensions (maximum axis numbers) in polynom.
virtual void	Print (Option_t *option) const
	Print information on standard output.
virtual Bool_t	BeforeEval (Int_t NDimension)
	Prepares (if necesary) some intermediate variables to be able calculate values of model via EvalN() function.
virtual Double_t	EvalN (const Double_t *v)
	Calculates value of model according current parameters values and provided axes values.
virtual void	AfterEval ()
	Clear buffers, which were created by BeforeEval() method.
Protected Member Functions
TString	GetOrderParName (Int_t naxis)
Private Member Functions
void	CreateOrdersPars (const Double_t *orders, Int_t startaxis, Int_t maxaxis, Int_t AtIndx=-1)
Private Attributes
Int_t	Par_ndim
	Temporary variable for EvalN() function.
TArrayD *	fxAllOrders
	Temporary variable for EvalN() function.
Double_t *	Par_orders
	Temporary variable for EvalN() function.

Detailed Description

Model objects, which reproduce component of polynomial function.

Expession can be written like:

Ampl * x^nx * y^ny * z^nz * ...

The order of polynomial function should be sets up in constructor like:

TGo4FitModelPolynom *p1 = new TGo4FitModelPolynom("Pol1",orderx,ordery,orderz); or TArrayD orders(5); Orders[0] = 1.; Orders[1] = 0.; ... TGo4FitModelPolynom *p2 = new TGo4FitModelPolynom("Pol2",Orders);

According to number of parameters in constructor TGo4FitModelPolynom has set of parameters "Order0", "Order1" and so on, representing polynom orders for axis x, y and so on correspondently. By default, these parameters are fixed and not fitted in optimizations. To change this default behavior, use:

p1->FindPar("Order0")->SetFixed(kFALSE);

TGo4FitModelPolynom class always has amplitude parameter, named "Ampl". It can be accessed by its name, for instance:

p1->FindPar("Ampl")->SetValue(1000.);

p1->GetAmplitudePar("Ampl")->SetValue(1000.);

GetAmplitudePar() method can be used in other models classes only if they create amplitude parameters, otherwise method returns 0.

Definition at line 50 of file TGo4FitModelPolynom.h.

Constructor & Destructor Documentation

TGo4FitModelPolynom::TGo4FitModelPolynom ( )

Default constructor.

Definition at line 23 of file TGo4FitModelPolynom.cxx.

TGo4FitModelPolynom::TGo4FitModelPolynom	(	const char *	iName,
		Double_t	iOrderX = `0.`
	)

Creates TGo4FitModelPolynom object with given name for 1-dim case.

The order of polynom for x axis can be specified (0 by default).

Definition at line 26 of file TGo4FitModelPolynom.cxx.

References CreateOrdersPars(), and TGo4FitModel::SetBackgroundGroupIndex().

TGo4FitModelPolynom::TGo4FitModelPolynom	(	const char *	iName,
		Double_t	iOrderX,
		Double_t	iOrderY
	)

Creates TGo4FitModelPolynom object with given name for 2-dim case.

The order of polynom for x and y axises should be specified.

Definition at line 32 of file TGo4FitModelPolynom.cxx.

References CreateOrdersPars(), and TGo4FitModel::SetBackgroundGroupIndex().

TGo4FitModelPolynom::TGo4FitModelPolynom	(	const char *	iName,
		Double_t	iOrderX,
		Double_t	iOrderY,
		Double_t	iOrderZ
	)

Creates TGo4FitModelPolynom object with given name for 3-dim case.

The order of polynom for x, y and z axises should be specified.

Definition at line 39 of file TGo4FitModelPolynom.cxx.

References CreateOrdersPars(), and TGo4FitModel::SetBackgroundGroupIndex().

TGo4FitModelPolynom::TGo4FitModelPolynom	(	const char *	iName,
		const TArrayD &	iPolynomOrders
	)

Creates TGo4FitModelPolynom object with given name for n-dim case.

An array of polynoms orders for appropriate axis should be specified. The size of array will be a dimensions size of polynom. But the n-dim polynom can be used for m-dim case. If n>m, orders for missing axis will be set 0. If n<m, only necessary orders will be used.

Definition at line 46 of file TGo4FitModelPolynom.cxx.

References CreateOrdersPars(), and TGo4FitModel::SetBackgroundGroupIndex().

TGo4FitModelPolynom::~TGo4FitModelPolynom ( ) [virtual]

Destroys TGo4FitModelPolynom object.

Definition at line 52 of file TGo4FitModelPolynom.cxx.

References fxAllOrders.