[R] problem with interaction in lmer even after creating an "interaction variable"

Ben Bolker bbolker at gmail.com
Fri Nov 8 15:26:54 CET 2013

a_lampei <anna.lampei-bucharova <at> uni-tuebingen.de> writes:

> Thank you very much,
> First, sorry for posting on wrong mailing list, I did not know that 
> there exists a special one for lmer.
> Yes, there are collinearities in the data.
> Still, I would like to have the variables in one model to compare 
> explained variability. Is there some option, or it is simply impossible?
> Thank you, Anna

  The development version of lme4 has an (experimental) feature
that automatically removes collinear columns of the model matrix;
you could try that.

  Further discussion on r-sig-mixed-models ...

  Ben Bolker

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