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?
Thanks for your help!
Paige Barlow
MS Student
Virginia Tech
Dept Fish and Wildlife
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