Andreas Lindén and Samu Mäntyniemi. 2011. Using the negative binomial distribution to model overdispersion in ecological count data. Ecology 92:1414–1421.

Supplement 1

MATLAB code for the log-likelihood.
Ecological Archives E092-120-S1.

Copyright

Authors
File list (downloads)
Description

Author(s)

Andreas Lindén
Department of Environmental Sciences, Fisheries and Environmental Management Group (FEM)
P.O. Box 65
FIN-00014
University of Helsinki
Finland
E-mail: andreas.linden@iki.fi

Samu Mäntyniemi
Department of Environmental Sciences, Fisheries and Environmental Management Group (FEM)
P.O. Box 65
FIN-00014
University of Helsinki
Finland

File list

nbinll.m

nbinll.doc [note that ESA cannot guarantee the forward migration of this file format]

Description

The file nbinll.m contains MATLAB code for a function returning the log-likelihood of a set of parameters. The likelihood is based on the assumption that the given count data (DATA) is negatively binomially distributed around predefined expectations (X), with the overdispersion parameters ω (OMEGA) and θ (THETA). The file itself contains MATLAB style user instructions/help.

The file nbinll.doc is basically the same information as in previous file but in MS-Word format. This file is visually more appealing for viewing the code outside the MATLAB editor.