[R] Alternate error structures in lme4?

[Ben Bolker]

bamsel wrote:
> 
> Hi R users, 
> 
> The nlme library enabled several alternate error structures useful for
> longitudinal or repeated-measures data. For example, a continuous AR(1)
> process:
> 
> model_2 = update(model_1, correlation = corCAR1(form = ~ time | subject))
> 
> Does anybody know if this is available in lme4?
> 
> 

It's not, and probably won't be any time soon; the author (Doug Bates)
has stated that it's not at the top of his list, and he's a very busy guy.
(1) Is there a reason that you can't use nlme?  (2) Further messages
should probably be directed to the r-sig-mixed-models at r-project.org
mailing list.

  Ben Bolker

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