R help - Feb 2009 - using stepAIC with negative binomial regression - error message

Ben,

I tried playing with the "na.action" but that didn't seem to
help.  I didn't know of the na.omit function.  It made it much easier to get
rid of all the missing values in the file, and now the regression model is
running.

I hadn't put interactions in the model yet since it wasn't even
running.  Cosday, sinday, and daylength are strongly collinear.  The full model
with interactions keeps all three in, plus all interactions between them.

Thanks for your help!

Tim





      
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