Hi, I'm trying to make multiple poisson regressions with the MLE2 command.
I have used the following expression, but I receive an error message:
poisfit <- mle2(y ~ dpois(exp(b0 + b1*x1 + b2*x2)), start=list(b0=1, b1=1,
b2=1), data=data1)
Error in optim(par = c(1, 1, 1), fn = function (p) :
non-finite initial value 'vmmin'
I have changed initial values using coefficient values given by the GLM
standard procedure but it still doesn't work.
Do someone knows where is the problem?
Many thanks in advance,
Elena
[[alternative HTML version deleted]]
______________________________________________
[email protected] 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.
