Message-ID: <E1Al7VY-0005Hw-5X.--66ac6f520c01e2a4982c3f80cd4326f790f2147e@maroon.csi.cam.ac.uk>
Date: 2004-01-26T14:14:32Z
From: J-C. Marioni
Subject: correlation/random effects when using nlme
Hi,
I'm trying to use nlme to program a model where, as well as a number of
fixed effects, I have a random effect for each subject in my model.
I would also like to include a correlation statement in my model, where the
grouping factor for the correlation is a subset of the observations on a
particular subject.
However, when I try and program this, R will not let me use a different
grouping structure for the random effects and the correlation structure. I
can't seem to solve this problem myself and so I would be grateful for any
help!
Thanks,
John Marioni
University of Cambridge