Putz Z in lmer

On Wed, Aug 17, 2011 at 3:09 PM, Eder David Borges da Silva

Dear group members
Imagine a mixed model y = Xb + Zu + e, Xb = fixed, random = Zu, is possible
in lme4: lmer declare the matrix of random effects for the adjustment??
Is there a function that allows to adjust this model stating the matrix Z and
X?

Not directly and, even if you could, it would not be sufficient to
specify Z - you also need to specify the form of the
variance-covariance matrix of the random effects and how it is
generated from the parameters to be optimized.

We do plan to provide facilities to do this in a future release.