class TUnuranContDist

library: libUnuran
#include "TUnuranContDist.h"

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class TUnuranContDist: public TUnuranBaseDist

Function Members (Methods)

public:

	TUnuranContDist(const TUnuranContDist&)
	TUnuranContDist(const TF1* pdf = 0, const TF1* deriv = 0, bool isLogPdf = false)
virtual	~TUnuranContDist()
double	Cdf(double x) const
static TClass*	Class()
virtual TUnuranContDist*	Clone() const
double	DPdf(double x) const
bool	GetDomain(double& xmin, double& xmax) const
bool	HasCdf() const
bool	HasMode() const
bool	HasPdfArea() const
virtual TClass*	IsA() const
bool	IsLogPdf() const
double	Mode() const
TUnuranContDist&	operator=(const TUnuranContDist& rhs)
double	Pdf(double x) const
double	PdfArea() const
void	SetCdf(TF1* cdf)
void	SetDomain(double xmin, double xmax)
void	SetMode(double mode)
void	SetPdfArea(double area)
virtual void	ShowMembers(TMemberInspector& insp, char* parent)
virtual void	Streamer(TBuffer& b)
void	StreamerNVirtual(TBuffer& b)

Data Members

private:

double	fArea	area below pdf
const TF1*	fCdf	pointer to the cdf
const TF1*	fDPdf	pointer to the derivative of the pdf
bool	fHasArea	flag to control if distribution has a pre-computed area below the pdf
bool	fHasDomain	flag to control if distribution has a defined domain (otherwise is [-inf,+inf]
bool	fHasMode	flag to control if distribution has a pre-computed mode
bool	fIsLogPdf	flag to control if function pointer represent log of pdf
double	fMode	mode of the distribution
const TF1*	fPdf	pointer to the pdf
double	fXmax	upper value of the domain
double	fXmin	lower value of the domain

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TUnuranContDist(const TF1* pdf = 0, const TF1* deriv = 0, bool isLogPdf = false)

 Constructor from a TF1 objects

TUnuranContDist(const TUnuranContDist& )

 Implementation of copy constructor (copy just the pointer )

double Pdf(double x) const

 evaluate the pdf of the destribution

double DPdf(double x) const

 evaluate the derivative of the pdf
 if derivative function is not given is evaluated numerically

double Cdf(double x) const

 evaluate the integral (cdf)  on the domain

virtual ~TUnuranContDist()

Destructor (no operations)

{}

TUnuranContDist * Clone()

Clone (required by base class)

{ return new TUnuranContDist(*this); }

void SetCdf(TF1* cdf)

set cdf distribution. If a method requires it
and is not set it is then estimated using numerical
integration from the pdf

{ fCdf = cdf; }

void SetDomain(double xmin, double xmax)

Set the distribution domain. If min < max a domain is defined otherwise is undefined

void SetMode(double mode)

set the distribution mode (x position of its maximum)

{ fMode = mode; fHasMode=true;}

void SetPdfArea(double area)

set the area below the pdf

{ fArea = area; fHasArea=true;}

bool GetDomain(double& xmin, double& xmax) const

check if distribution has a defined domain and return in case its domain

bool HasCdf()

check if a cdf fucntion is provided for the distribution

{ return fCdf != 0; }

bool HasMode()

check if distribution has a pre-computed mode

{ return fHasMode; }

bool HasPdfArea()

check if distribution has a pre-computed area below the Pdf

{ return fHasArea; }

double Mode()

return the mode   (x location of  maximum of the pdf)

{ return fMode; }

double PdfArea()

return area below the pdf

{ return fArea; }

bool IsLogPdf()

lag to control if given function represent the log of a pd

{ return fIsLogPdf; }

Last update: root/unuran:$Name: $:$Id: TUnuranContDist.cxx,v 1.1 2007/03/08 09:31:54 moneta Exp $
Copyright (c) 2006 LCG ROOT Math Team, CERN/PH-SFT *

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