# egamma Class Reference

Gamma posterior density. More...

`#include <libEF.h>`

Inheritance diagram for egamma:

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Collaboration diagram for egamma:

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List of all members.

## Public Member Functions
| egamma (const RV &rv)
| Default constructor.
void | set_parameters (const vec &a, const vec &b)
| Sets parameters.
vec | sample () const
| Returns the required moment of the epdf.
double | evalpdflog (const vec &val) const
| TODO: is it used anywhere?
double | lognc () const
| logarithm of the normalizing constant,
void | _param (vec *&a, vec *&b)
| Returns poiter to alpha and beta. Potentially dengerous: use with care!
vec | mean () const
| return expected value
virtual void | tupdate (double phi, mat &vbar, double nubar)
| TODO decide if it is really needed.
virtual void | dupdate (mat &v, double nu=1.0)
| TODO decide if it is really needed.
virtual mat | sampleN (int N) const
| Returns N samples from density .
virtual double | eval (const vec &val) const
| Compute probability of argument `val`.
RV | _rv () const
| access function
## Protected Attributes
vec | alpha
| Vector .
vec | beta
| Vector .
RV | rv
| Identified of the random variable.

## Detailed Description

Gamma posterior density.

Multvariate Gamma density as product of independent univariate densities.

## Member Function Documentation

vec egamma::sample | ( |  | ) | const`[virtual]`

Returns the required moment of the epdf.

Returns a sample, from density

Implements epdf.

References alpha, beta, RV::count(), epdf::rv, and itpp::Gamma_RNG::setup().

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

- work/git/mixpp/bdm/stat/libEF.h
- work/git/mixpp/bdm/stat/libEF.cpp