[R] an alternative to R for nonlinear stat models
p.hiemstra at geo.uu.nl
Wed Jun 16 09:36:24 CEST 2010
On 06/16/2010 07:35 AM, benedikt.gehr at ieu.uzh.ch wrote:
> I implemented the age-structure model in Gove et al (2002) in R, which is a
> nonlinear statistical model. However running the model in R was very slow.
> So Dave Fournier suggested to use the AD Model Builder Software package and
> helped me implement the model there.
> ADMB was incredibly fast in running the model:
> While running the model in R took 5-10 minutes, depending on the settings,
> in ADMB it took 1-2 seconds!
> I'm reporting this so that people who have performance issues with nonlinear
> statistical models in R will know that there is a good free alternative for
> more difficult problems.
> There is also a help platfrom equivalent to the one for R, and people
> running it are extremley helpful.
> I hope this might help someone
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Thanks for posting information that might be useful for people on the
list. The only thing is that without a little more detail on how exactly
you implemented things in R, we are left to guess if the performance
issues are a problem of R, or that your particular implementation was
the problem. There are was of implementing R code in two ways, where the
first takes minutes and the second 1-2 seconds. Furthermore, you are
giving us no option to defend R ;).
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
P.O. Box 80.115
3508 TC Utrecht
Phone: +3130 274 3113 Mon-Tue
Phone: +3130 253 5773 Wed-Fri
More information about the R-help