Antonio,

The asreml-r package can fit an extensive variety of variance models
including factor analytic and antedependence.  A full list can be found in
the manual at http://www.vsni.co.uk/downloads/asreml/release3/asreml-R.pdf

You may qualify for the free discovery version at
http://www.vsni.co.uk/software/discovery/asreml-discovery


Kevin


On Mon, Jan 2, 2012 at 2:41 AM, Antonio P. Ramos <
ramos.grad.student@gmail.com> wrote:

> Hi all,
>
> I've trying to use R to fit some longitudinal models, mostly via lme and
> nlme packages. However, it seems that many standard models are lacking,
> such as antedependence models or factor analytic models for covariance
> matrices. These models are readily available in SAS. Does an recommend
> other packages for the job in R? I don't really care if I am in frequentist
> or bayesian world as long as I have more modeling flexibility. I would also
> be interested in doing that in WINBUGS/JAGS.
>
> All the best,
>
> Antonio.
>
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-- 
Kevin Wright

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