[R-sig-ME] code for multiple membership models?

[George Leckie]

Dear Doug,

I found your post on fitting multiple membership models using lme4a very helpful

    https://stat.ethz.ch/pipermail/r-sig-mixed-models/2011q2/006318.html

and I managed to get this approach on my own data.

I am now trying to follow the same approach on the new version of lme4
as this is now meant to have superceded lme4a

    http://lme4.r-forge.r-project.org/

However, the approach no longer appears to work as the the noFit
option appears not to be supported. It also no longer seems possible
to edit the Zt matrices and so on.

Might you be able to update your previous example to show us how to
fit multiple membership models using the new lme4?

I see that there have also been some recent posts about difficulties
in manually editing Zt in other contexts, so perhaps this is general
problem for lme4 which lme4a could deal with?

    https://stat.ethz.ch/pipermail/r-sig-mixed-models/2012q2/018118.html

Best wishes

George