Hello, I have some problems regarding the function optim. In my simulations I generate negative binomial data and get estimates of the parameter using the likelihood and the package optim. At some point there appears the warning:
- non-finite finite-difference value [] I think it occurs, when the shape converges ->0 (no overdispersion). Is there an explanation for this and how do I handle it, because the simulations stops in this step. Thanks wasss -- View this message in context: http://r.789695.n4.nabble.com/Optim-tp4644581.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
