Dear R users
When I use OPTIM with BFGS, I've got a significant result without an error message. However, when I use OPTIMX with BFGS( or spg), I've got the following an error message. ---------------------------------------------------------------------------------------------------- > optimx(par=theta0, fn=obj.fy, gr=gr.fy, method="BFGS", > control=list(maxit=10000)) Error: Gradient function might be wrong - check it! ---------------------------------------------------------------------------------------------------- I checked and checked my gradient function line by line. I could not find anything wrong. Is it a bug or something? I prefer OPTIMX, so I'd like to know why. Thanks a lot in advance Regards, Kathryn Lord -- View this message in context: http://r.789695.n4.nabble.com/gradient-function-in-OPTIMX-tp3775791p3775791.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.
