Franco, You can provide lower and upper bounds on the parameters if you use optim with method="L-BFGS-B". Hth, Ingmar
Thanks, but when I use L-BFGS-B it tells me that there is an error in optim(start, f, method = method, hessian = TRUE, ...) : L-BFGS-B needs finite values of 'fn' -- View this message in context: http://www.nabble.com/maximum-likelihood-estimation-of-5-parameters-tf2925364.html#a8180120 Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@stat.math.ethz.ch 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.
