XeDist Class Reference

Inheritance diagram for XeDist:

List of all members.

Public Member Functions
double	cdf (double x1, double x2)
	computes integrated probability density function between bounds
virtual double	cdf (double x)=0
	returns cumulated probability density function
virtual double	generate ()=0
	generates a pseudo random variable according to the distribution
vector< double >	generateVector (int n)
	generates a vector of pseudo random variables according to the distribution
virtual double	logPdf (double x)
	returns logs of probability density function
virtual double	pdf (double x)=0
	returns probability density function
	XeDist (string n)
	Basic constructor.
Static Public Member Functions
static double	findQuantile (TH1 *h, double q)
	Return quantile of an histogram.
static double	findSigma (TH1 *h, double sigma)
	Return value for n sigmas above/below in a histogram.
static string	getTheName (string nam)
	Return the corrected name.
static void	normalize (TGraph *graph, double toWhat=1.)
	Normalize TGraph the way I like.
static void	normalize (TH1F *h, double toWhat=1.)
	Normalize histograms the way I like.
static double	rndm ()
	Wraper to random generator.
Static Protected Attributes
static TRandom3	random

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Member Function Documentation

double XeDist::cdf	(	double	x1,
		double	x2
	)

computes integrated probability density function between bounds

Returns:

Integrated pdf inside interval

Parameters:

	x1	Lower bound of integration
	x2	Upper bound of integration

virtual double XeDist::cdf

(

double

x

)

[pure virtual]

returns cumulated probability density function

Returns:

Cumulated probability density function

Parameters:

x

Point at which is it evaluated

Implemented in TabulatedDist, UniformDist, ExponentialDist, Chi2Dist, GaussianDist, and PoissonDist.

static double XeDist::findQuantile	(	TH1 *	h,
		double	q
	)			[static]

Return quantile of an histogram.

Returns:

value of the smallest values for a given fraction

Parameters:

	histogram	to be considered
	q	quantile (fraction of distribution considered)

static double XeDist::findSigma	(	TH1 *	h,
		double	sigma
	)			[static]

Return value for n sigmas above/below in a histogram.

Returns:

value of the smallest values for a given fraction

Parameters:

	histogram	to be considered
	sigma	quantile expressed in +/- n sigmas (e.g - 0> .5, +1 -> 0.68)

virtual double XeDist::generate

(

)

[pure virtual]

generates a pseudo random variable according to the distribution

Returns:

A pseudo random variable generated according to the distribution

Implemented in TabulatedDist, UniformDist, ExponentialDist, Chi2Dist, GaussianDist, and PoissonDist.

vector<double> XeDist::generateVector

(

int

n

)

generates a vector of pseudo random variables according to the distribution

Parameters:

n

number of elements

Returns:

A vector of size n

virtual double XeDist::logPdf

(

double

x

)

[virtual]

returns logs of probability density function

Returns:

Log of probability density function

Parameters:

x

Point at which is it evaluated

Reimplemented in ExponentialDist, GaussianDist, and PoissonDist.

static void XeDist::normalize	(	TGraph *	graph,
		double	toWhat = 1.
	)			[static]

Normalize TGraph the way I like.

Parameters:

	graph	graph to be normalized
	toWhat	requested sum of graph after normalisation (1.-> makes it a distribution!)

static void XeDist::normalize	(	TH1F *	h,
		double	toWhat = 1.
	)			[static]

Normalize histograms the way I like.

Parameters:

	h	histogram to be normalized
	toWhat	requested sum of histogram after normalisation

virtual double XeDist::pdf

(

double

x

)

[pure virtual]

returns probability density function

Returns:

Probability density function

Parameters:

x

Point at which is it evaluated

Implemented in TabulatedDist, UniformDist, ExponentialDist, Chi2Dist, GaussianDist, and PoissonDist.

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Member Data Documentation

TRandom3 XeDist::random [static, protected]

random generator

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

• /home/lellouch/Dropbox/Xenon/Xephyr/XeStat.h