R help - Jul 2006 - glmmPQL help

I need to use the glmmPQL function for an assignment, but when I call for the
summary of the function, it gives the AIC a value of NA. How do I get R to
give me the AIC value?
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On Mon, 17 Jul 2006, Zython wrote:
> 
> I need to use the glmmPQL function for an assignment, but when I call for
the
> summary of the function, it gives the AIC a value of NA. How do I get R to
> give me the AIC value?
You did!

Hint: have you read the reference of which this is part of the support 
software?  If so you will know that you need a maximized likelihood to 
evaluate AIC, and your fit is not an MLE.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595