[18650] in s-news-athena
Re: [S] E & M Routines or Software
daemon@ATHENA.MIT.EDU (Prof Brian D Ripley)
Fri Jul 16 16:48:40 1999
Date: Fri, 16 Jul 1999 21:44:48 +0100 (BST)
From: Prof Brian D Ripley <ripley@stats.ox.ac.uk>
To: BILL COX <COX.BILL@epamail.epa.gov>
Cc: s-news@wubios.wustl.edu
In-Reply-To: <s78f44ac.024@RT-MAIL2.RTP.EPA.GOV>
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On Fri, 16 Jul 1999, BILL COX wrote:
> Does anyone aware of any routines for computing
> Expectation Maximization (EM).
This is an FAQ (literally). EM is not an algorithm nor something that can
be computed: it is a method for devising algorithms.
In some circles it is a misnomer for fitting mixtures of Gaussians: library
mda uses the EM algorithm to do so (by `maximum likelihood').
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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