Date: Mon, 4 Apr 2011 20:48:18 0400
ReplyTo: R B <ryan.andrew.black@GMAIL.COM>
Sender: "SAS(r) Discussion" <SASL@LISTSERV.UGA.EDU>
From: R B <ryan.andrew.black@GMAIL.COM>
Subject: Re: Nested models using NLMIXED
InReplyTo: <f7f0bcf3d6160310b38c74081e02b917.squirrel@webmail.pitt.edu>
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Francis,
Dale has shown how to fit a nested random effects model employing the
NLMIXED procedure, if that's what you're asking. Just search the SASL
archives. I'll point out, though, that it is generally much easier to
fit a nested random effects model using the GLIMMIX procedure.
I'm not sure exactly what type of joint model you're considering (I'm
actually not sure what you mean by joint model). It is possible to
model multiple dependent variables simulteanously using the GLIMMIX
procedure, even if the distributions of the dependent variables are
not the same. There are certain models that cannot be fitted using
GLIMMIX, such as mixture models like the zeroinflated poisson model.
The NLMIXED procedure is capable of fitting these models. Again, if
you search the archives, you'll find plenty of examples by Dale.
Ryan
On Mon, Apr 4, 2011 at 3:56 PM, SUBSCRIBE SASL Ameribrit <FRP3@pitt.edu> wrote:
> HI Guys: a friend of mine is trying to fit a nested joint model in MATLAB
> with no joy. Is there a way to trick NLMIXED into fitting a nested model?
> I think I read somewhere that it can only do a single level of nesting but
> I wasnt sure.
>
> Thanks
> Francis
>
