Yes, some form of try() is often needed with nls() to avoid scripts stopping.
You might also find nlxb() from package nlsr more reliable in finding solutions. It uses analytic derivatives if available if the model is given as an expression, and a Marquardt stabilized solver. But do expect it to take more iterations. The syntax is close, but not perfectly equivalent, to that of nls(). JN On 2017-10-20 11:20 AM, Jeff Newmiller wrote: > ?tryCatch > ______________________________________________ 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 http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
