dpois.cpp File Reference

(Last Changed on October 01, 2014 for git-revision a39518c66ad6b305aabfba50e77ad1f36cfaf9af.)

Poisson density functions. More...

#include "statsLib.h"

Go to the source code of this file.

Functions
dvariable	dpois (const double &k, const prevariable &lambda)
dvariable	dpois (const prevariable &k, const prevariable &lambda)
dvariable	dpois (const dvector &k, const dvar_vector &lambda)

Detailed Description

Poisson density functions.

Author

Steven Martell

Date

24/06/2011

This file contains the negative loglikelihood functions for the Poisson distribution. The function dpois is overloaded to accommodate variable and data objects.

The negative log likelihood function is implemented as:

where is the probability and number of trials, and is the number of successes.

Definition in file dpois.cpp.

Function Documentation

dvariable dpois	(	const double &	k,
		const prevariable &	lambda
	)

Author

Steven James Dean Martell UBC Fisheries Centre

Date

2011-06-24

Parameters

k	observed number
lambda	epected mean of the distribution

Returns

returns the negative loglikelihood

See Also

Definition at line 35 of file dpois.cpp.

dvariable dpois	(	const prevariable &	k,
		const prevariable &	lambda
	)

Author

Steven James Dean Martell UBC Fisheries Centre

Date

2011-06-24

Parameters

k	observed number
lambda	epected mean of the distribution

Returns

returns the negative loglikelihood

See Also

Definition at line 51 of file dpois.cpp.

dvariable dpois	(	const dvector &	k,
		const dvar_vector &	lambda
	)

Author

Steven James Dean Martell UBC Fisheries Centre

Date

2011-06-24

Parameters

k	vector of observed numbers
lambda	vector of epected means of the distribution

Returns

returns the negative loglikelihood

See Also

Definition at line 67 of file dpois.cpp.