On Thu, 11 Dec 2008, Paige Barlow wrote:
I am attempting to fit a full zero-inflated Poisson model then use backward
elimination to arrive at the best-fitting model. When I try to fit the model
with zeroinfl() I get this error:
Error in while (abs((ll_old - ll_new)/ll_old) > control$reltol) { :
missing value where TRUE/FALSE needed
Any suggestions?
Read the posting guide linked at the end of the mail. The information
above is really insufficient to say much useful.
The error message suggests that something in the specification of starting
values is not correct. You seem to have used EM = TRUE, try (the default)
EM = FALSE instead.
Z
Thanks for your help!
Paige Barlow
MS Student
Virginia Tech
Dept Fish and Wildlife
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______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
