[R] model-based clustering

maj@stats.waikato.ac.nz maj at stats.waikato.ac.nz
Wed Jan 14 20:39:24 CET 2004

The list could probably be more useful if you gave more details about your
data and the problem. I have written a bit of R code myself for fitting a
finite mixture of univariate Poissons by EM and found it very simple to
program in R. I suspect that your problem is multivariate, but that should
not present any difficulties.

The Snob program employs a fairly sophisticated model search strategy
based on the Minimum Message Length criterion. If you do not know much
about the solution that you are seeking it might be a good way to go. I
appreciate that Snob can be rather complex to set up and get going but I
think that you should be able to get quite a bit of help from the Monash
University people behind the program. They are usually quite keen to
encourage new users of Snob.

Murray Jorgensen

> Hello,
> I was wondering whether a Poisson mixture modeler/cluster analysis
> package is available for R. I scanned CRAN packages and couldn't find
> anything but I thought I'd ask. If not could anyone recommend a non-R
> open source package. I have found 'snob' but this program seems a bit
> hard to use in an automated, non interactive fashion.
> regards,
> Murad
> --
> Murad Nayal M.D. Ph.D.
> Department of Biochemistry and Molecular Biophysics
> College of Physicians and Surgeons of Columbia University
> 630 West 168th Street. New York, NY 10032
> Tel: 212-305-6884	Fax: 212-305-6926
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