elena daniela concepcion <elenadconcepcion <at> gmail.com> writes:
> > 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? > There's nothing obviously wrong here. A reproducible example would be very helpful ... this *should* give the same result as glm(y~x1+x2,family=poisson,data=data1) ... What is with(data1,range(exp(b0+b1*x1+b2*x2))) ? ______________________________________________ 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.
