Re: [R] Very slow optim(): solved

2011-07-14 Thread Hamazaki, Hamachan (DFG)
-9934 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Ben Bolker Sent: Wednesday, July 13, 2011 12:21 PM To: r-h...@stat.math.ethz.ch Subject: Re: [R] Very slow optim() Hamazaki, Hamachan (DFG toshihide.hamazaki at alaska.gov writes

[R] Very slow optim()

2011-07-13 Thread Hamazaki, Hamachan (DFG)
Dear list, I am using optim() function to MLE ~55 parameters, but it is very slow to converge (~ 25 min), whereas I can do the same in ~1 sec. using ADMB, and ~10 sec using MS EXCEL Solver. Are there any tricks to speed up? Are there better optimization functions? Thanks