On 2024-12-13 13:55, Daniel Lobo wrote:
1. Why nloptr() is failing where other programs can continue with the same set of data, numbers, and constraints? 2. Is this enough ground to say that nloptr is inferior and user should not use this in complex problems?
As I indicated in a recent response, nloptr has a lot of settings and possibilities. It is VERY easy to choose poor values. I think Ravi Varadhan has probably done a lot of work in alabama to set things up so the user has an easier time. I certainly did. In fact I'm now getting complaints in your modified script when I try nloptr, but that's likely some typo or other. I substituted optim's Nelder-Mead for anms, and got same results essentially, so you could run with just old-standard optim() which is built into R. (I even wrote the original BASIC code in 1975.) JN ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
