[R-sig-ME] Notebooks on some topics in mixed-effects modeling

[Douglas Bates]

I have started writing notebooks on some aspects of mixed-effects modeling
that I find are sometimes misunderstood.  The notebooks are in

https://github.com/dmbates/MixedModelsinJulia

The first notebook is on singular estimates of the covariance of
vector-valued random effects.

It can be a bit hit-or-miss for some of the plots in the display directly
from github.com.  If you have jupyter installed (see https://jupyter.org)
you should be able to view the notebooks in a Jupyter session.

An alternative is to establish an account on https://juliabox.com and,
under the "Files" tab, link the github repository.  Then open the notebook
in the Jupyter tab.

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