[R] mixture distributions

Jobst Landgrebe landgreb at mpipsykl.mpg.de
Mon Sep 3 21:10:53 CEST 2001

Dear List,

I am looking for a possibility to fit a mixture model under R using
maximum likelihood estimation.
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.

Is there anyone who

a) knows how one could make the MASS-method run under R?


b) has written an EM-algorithm to fit mixture models in R that I could

I would be glad to hear from someone.



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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