[ADMB Users] an alternative to R for nonlinear stat models
arnima at hafro.is
Wed Jun 16 13:40:09 PDT 2010
It has been brought to my attention that the 1997 benchmark was updated in
2006, using R instead of S-Plus. and a newer computer, obviously.
The result was that ADMB converged more than 1000 times faster than R.
The model is an ecological population model, not unlike Gove et al.
(2002). Anyone should be able to replicate the results, since the updated
http://admb-project.org/community/benchmarks/optimization page has links
to the ADMB code, R code, and the input data. The 2006 benchmark used the
R optimizer nlminb(), so there are many other R optimizers that could be
Any improvements are of course welcomed, although the current discussion
may be focusing on the similar Gove et al. (2002) example.
I should also correct what I said about ADMB doing "optimization and
nothing else", since ADMB features like random effects and MCMC are beyond
the standard features of optimizers.
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