FactorisedDensity Class Reference

Class that describes the factorised density: the product of densities in two or more component phase spaces. More...

#include <FactorisedDensity.hh>

Inheritance diagram for FactorisedDensity:

Public Member Functions
	FactorisedDensity (const char *pdfName, AbsPhaseSpace *thePhaseSpace, std::vector< AbsDensity * > &densityComponents)
	Constructor of factorised density of an arbitrary number of density components. More...
	FactorisedDensity (const char *pdfName, AbsPhaseSpace *thePhaseSpace, AbsDensity *d1, AbsDensity *d2, AbsDensity *d3=0, AbsDensity *d4=0)
	Constructor of factorised density of up to four density components. More...
virtual	~FactorisedDensity ()
	Destructor. More...
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 Member Functions
void	init (AbsPhaseSpace *thePhaseSpace, std::vector< AbsDensity * > &densityComponents)
	Common initialise function used by all constructors. More...

Private Attributes
AbsPhaseSpace *	m_phaseSpace
	Reference to phase space. More...
std::vector< AbsDensity * >	m_densityComponents
	Vector of density components. 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 factorised density: the product of densities in two or more component phase spaces.

Definition at line 13 of file FactorisedDensity.hh.

Constructor & Destructor Documentation

FactorisedDensity::FactorisedDensity	(	const char *	pdfName,
		AbsPhaseSpace *	thePhaseSpace,
		std::vector< AbsDensity * > &	densityComponents
	)

Constructor of factorised density of an arbitrary number of density components.

Parameters

[in]	pdfName	PDF name
[in]	thePhaseSpace	phase space. Dimensionality of the phase space should be equal to the sum of dimensionalities of all density components.
[in]	densityComponents	vector of density components.

Definition at line 13 of file FactorisedDensity.cpp.

FactorisedDensity::FactorisedDensity	(	const char *	pdfName,
		AbsPhaseSpace *	thePhaseSpace,
		AbsDensity *	d1,
		AbsDensity *	d2,
		AbsDensity *	d3 = 0,
		AbsDensity *	d4 = 0
	)

Constructor of factorised density of up to four density components.

Parameters

[in]	pdfName	PDF name
[in]	thePhaseSpace	phase space. Dimensionality of the phase space should be equal to the sum of dimensionalities of all density components.
[in]	d1	1st density component.
[in]	d2	2nd density component.
[in]	d3	3rd density component.
[in]	d4	4th density component.

Definition at line 20 of file FactorisedDensity.cpp.

FactorisedDensity::~FactorisedDensity ( )

virtual

Destructor.

Definition at line 37 of file FactorisedDensity.cpp.

Member Function Documentation

Double_t FactorisedDensity::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

Implements AbsDensity.

Definition at line 63 of file FactorisedDensity.cpp.

void FactorisedDensity::init ( AbsPhaseSpace *  thePhaseSpace, std::vector< AbsDensity * > &  densityComponents  )

private

Common initialise function used by all constructors.

Parameters

[in]	thePhaseSpace	phase space
[in]	densityComponents	vector of density components.

Definition at line 41 of file FactorisedDensity.cpp.

AbsPhaseSpace* FactorisedDensity::phaseSpace ( )

inlinevirtual

Return phase space definition for this PDF.

Returns

PDF phase space

Implements AbsDensity.

Definition at line 57 of file FactorisedDensity.hh.

Member Data Documentation

std::vector<AbsDensity*> FactorisedDensity::m_densityComponents

private

Vector of density components.

Definition at line 73 of file FactorisedDensity.hh.

UInt_t FactorisedDensity::m_dim

private

Cached dimensionality of the phase space.

Definition at line 76 of file FactorisedDensity.hh.

AbsPhaseSpace* FactorisedDensity::m_phaseSpace

private

Reference to phase space.

Definition at line 70 of file FactorisedDensity.hh.

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

• inc/FactorisedDensity.hh
• src/FactorisedDensity.cpp