[R] mixture distributions

[Ko-Kang Wang]

Hi Jobst,

----- Original Message -----
From: "Jobst Landgrebe" <landgreb at mpipsykl.mpg.de>
To: <r-help at lists.R-project.org>
Sent: Tuesday, September 04, 2001 7:10 AM
Subject: [R] mixture distributions


> Dear List,
>
> Venables and Ripley describe a solution working under S+ (in MASS, 3. ed.,
> p. 263) which requires the D system function and deriv3. This solution
does not
> seem to be portable to R or at least I do not realise how.

It is, there is a version for R.  Look in CRAN (http://cran.r-project.org/).
It is called VR package (Venables and Ripley).

> Is there anyone who
>
> a) knows how one could make the MASS-method run under R?

Depends on the OS platform are using, install the package then type
library( MASS ) in R.

> or
>
> b) has written an EM-algorithm to fit mixture models in R that I could
> use?
>
>
> I would be glad to hear from someone.
>
>
> Sincerely,
>
> Jobst
>
>
>
> Dr. Jobst Landgrebe
> AG Wurst (Molecular Neurogenetics)
> MPI of Psychiatry
> Kraepelinstr. 2-10
> D-80804 Munich
> phone +49 89 30622626
> fax +49 89 30622642
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