Chi2Dist Class Reference

Chi2 distribution. More...

#include <XeStat.h>

Inheritance diagram for Chi2Dist:

List of all members.

Public Member Functions
double	cdf (double x)
	return the cumulated distribution function
	Chi2Dist (int dof)
	Regular constructor.
	Chi2Dist ()
	Empty constructor for ROOT.
double	generate ()
	generate a pseudo random variable according to this distribution
double	pdf (double x)
	return the normalized probability distribution function
void	setNdof (int ndof)
	set number of degrees of freedom
Static Public Member Functions
static double	above (double chi2, int ndof)
	Compute the integreal above a given chi2.
static double	below (double chi2, int ndof)
	Compute the integreal below a given chi2.
static double	between (double chi2_1, double chi2_2, int ndof)
	Compute the integral between two chi2.
static double	generate (int dof)
	generate a pseduo ranodm variable distributed accoring to a chi2 dist.
static double	pdf (double x, int dof)
	Compute the pdf (static method).
Protected Attributes
int	ndof

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Detailed Description

Chi2 distribution.

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Constructor & Destructor Documentation

Chi2Dist::Chi2Dist

(

int

dof

)

Regular constructor.

Parameters:

ndof

number of degrees of freedom

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Member Function Documentation

static double Chi2Dist::above	(	double	chi2,
		int	ndof
	)			[static]

Compute the integreal above a given chi2.

Parameters:

	chi2	tested chi2
	dof	number of degrees of freedom

static double Chi2Dist::below	(	double	chi2,
		int	ndof
	)			[static]

Compute the integreal below a given chi2.

Parameters:

	chi2	tested chi2
	dof	number of degrees of freedom

static double Chi2Dist::between	(	double	chi2_1,
		double	chi2_2,
		int	ndof
	)			[static]

Compute the integral between two chi2.

Parameters:

	chi2_1	lower bound
	chi2_2	upper bound
	dof	number of degrees of freedom

double Chi2Dist::cdf

(

double

x

)

[virtual]

return the cumulated distribution function

Parameters:

x

the random variable

Implements XeDist.

static double Chi2Dist::generate

(

int

dof

)

[static]

generate a pseduo ranodm variable distributed accoring to a chi2 dist.

Parameters:

dof

number of degrees of freedom

static double Chi2Dist::pdf	(	double	x,
		int	dof
	)			[static]

Compute the pdf (static method).

Parameters:

	x	random variable
	dof	number of degrees of freedom

double Chi2Dist::pdf

(

double

x

)

[virtual]

return the normalized probability distribution function

Parameters:

x

the random variable

Implements XeDist.

void Chi2Dist::setNdof

(

int

ndof

)

set number of degrees of freedom

Parameters:

ndof

number of degrees of freedom

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

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