Yes, this can be done and the call is the same, however the C++ needs to
be indicated as <external c>, see details in the writing R extensions  
manual.
hth, Ingmar

On 6 Nov 2007, at 17:05, Deepankar Basu wrote:

> Hi All,
>
> I am trying to do an ML estimation in R. My likelihood function has
> several nested loops and so it takes a lot of time (days when I use  
> the
> genetic algorithm for optimization) for the optimization to finish.
> Unable to avoid loops, I am thinking of writing the likelihood  
> function
> in C++ and calling it from within R when using *optim()*. I found that
> one can call C functions (once they have been compiled) from within R
> with
>
>> dyn.load("file.so")
>
> and
>
>> .C("function", ...)
>
> Can the same be done for C++ code?
>
>
> Deepankar
>
> ______________________________________________
> 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.

Ingmar Visser
Department of Psychology, University of Amsterdam
Roetersstraat 15
1018 WB Amsterdam
The Netherlands
t: +31-20-5256723



	[[alternative HTML version deleted]]

