It is straightforward to specify an autoregressive random effects covariance structure using the nlme
package in R
, but, it seems to be unavailable in the lme4
package, at least according to a comment on the selected answer to this question, although that comment was from 2010.
Is it possible because of advances in lme4
or through another approach to specify an autoregressive random effects covariance structure in lme4
?
lme4
(instead ofnlme
). Maybe I should usenlme
instead, then. $\endgroup$