FormulaDensity Class Reference

#include <FormulaDensity.hh>

Inheritance diagram for FormulaDensity:

Public Member Functions
	FormulaDensity (const char *pdfName, AbsPhaseSpace *thePhaseSpace, const char *formula)
	Constructor. More...
	FormulaDensity (const char *pdfName, AbsPhaseSpace *thePhaseSpace, TFormula *formula)
	Constructor. More...
virtual	~FormulaDensity ()
Double_t	density (std::vector< Double_t > &x)
	Calculate PDF value at the given point. More...
AbsPhaseSpace *	phaseSpace ()
	Return phase space definition for this PDF. More...
Public Member Functions inherited from AbsDensity
	AbsDensity (const char *pdfName)
	Constructor. More...
virtual	~AbsDensity ()
	Destructor. More...
void	slice (std::vector< Double_t > &x, UInt_t num, TH1F *hist)
	Calculate 1D slice of the PDF. More...
void	slice (std::vector< Double_t > &x, UInt_t numx, UInt_t numy, TH2F *hist, Bool_t inPhaseSpace=true)
	Calculate 2D slice of the PDF. More...
double	transform (TH1F *hist1, TH1F *hist2, double x)
void	project (TH1F *hist)
	Calculate projection of the 1D PDF. More...
void	project (TH2F *hist, Bool_t inPhaseSpace=true)
	Calculate projection of the 2D PDF. More...
void	setMajorant (Double_t majorant)
	Set majorant for accept-reject method. More...
void	setMaxTries (UInt_t maxTries)
	Set maximum number of tries for accept-reject method. More...
Double_t	generate (std::vector< Double_t > &x)
	Generate a single point within the phase space according to the PDF using accept-reject method. More...
void	generate (TNtuple *tree, UInt_t numEvents)
	Generate a sample of points within the phase space according to the PDF using accept-reject method. More...
const char *	name (void)
	Return the name of the PDF. More...
void	setSeed (UInt_t seed=0)
	Set random seed. More...

Private Attributes
AbsPhaseSpace *	m_phaseSpace
	Reference to phase space. More...
TFormula *	m_formula
	ROOT formula. More...
UInt_t	m_dim
	Cached dimensionality of the phase space. More...

Additional Inherited Members
Protected Attributes inherited from AbsDensity
char	m_name [256]
	PDF name. More...
Double_t	m_majorant
	PDF majorant (maximum PDF value needed for accept-reject). More...
UInt_t	m_maxTries
	Maximum number of tries for accept-reject method. More...
TRandom3	m_rnd
	Random number generator. More...

Detailed Description

Class that describes the density defined by ROOT formula The phase space dimensionality must not exceed four

Definition at line 14 of file FormulaDensity.hh.

Constructor & Destructor Documentation

FormulaDensity::FormulaDensity	(	const char *	pdfName,
		AbsPhaseSpace *	thePhaseSpace,
		const char *	formula
	)

Constructor.

Parameters

[in]	pdfName	PDF name
[in]	thePhaseSpace	phase space definition
[in]	formula	ROOT formula string

Definition at line 12 of file FormulaDensity.cpp.

FormulaDensity::FormulaDensity	(	const char *	pdfName,
		AbsPhaseSpace *	thePhaseSpace,
		TFormula *	formula
	)

Constructor.

Parameters

[in]	pdfName	PDF name
[in]	thePhaseSpace	phase space definition
[in]	formula	ROOT TFormula object

Definition at line 26 of file FormulaDensity.cpp.

FormulaDensity::~FormulaDensity ( )

virtual

Definition at line 40 of file FormulaDensity.cpp.

Member Function Documentation

Double_t FormulaDensity::density ( std::vector< Double_t > &  x )

virtual

Calculate PDF value at the given point.

Parameters

[in]

x

the point at which to calculate the PDF

Returns

PDF value (equals 1 inside phase space, 0 outside it)

Implements AbsDensity.

Definition at line 44 of file FormulaDensity.cpp.

AbsPhaseSpace* FormulaDensity::phaseSpace ( )

inlinevirtual

Return phase space definition for this PDF.

Returns

PDF phase space

Implements AbsDensity.

Definition at line 51 of file FormulaDensity.hh.

Member Data Documentation

UInt_t FormulaDensity::m_dim

private

Cached dimensionality of the phase space.

Definition at line 62 of file FormulaDensity.hh.

TFormula* FormulaDensity::m_formula

private

ROOT formula.

Definition at line 59 of file FormulaDensity.hh.

AbsPhaseSpace* FormulaDensity::m_phaseSpace

private

Reference to phase space.

Definition at line 56 of file FormulaDensity.hh.

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

• inc/FormulaDensity.hh
• src/FormulaDensity.cpp