[R] lmer and correlation

From: R Help <rhelp.stats_at_gmail.com>
Date: Thu, 13 Mar 2008 10:43:56 -0300

Hello list,

     I've been reading through the archives and it seems as though, as of right now, there is no way to specify the correlation structure in lmer. I was wondering if anyone knows if this is going to be implemented? I'm using mixed-effects models within a tree structure, so I make a lot of calls to lme to get the resulting deviance, and lmer2 is almost 5 times faster than lme on my test data, so if it may be implemented later I'd be willing to wait, otherwise I might look into trying to hack it myself.

Sam Stewart

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