Hi, I've got a simulation function, written in C and called from R, that uses the R random number functions. It's not a very complicated simulation - 280 lines total, with the main function (the one called with .C) repeatedly calling another function, with multiple calls to unif_rand() in both functions. At the beginning of the main function I call GetRNGstate(), and the last thing I do before returning to R is PutRNGstate().
On rereading Chapter 5 of the R Extensions manual, I'm not sure I understand the GetRNGstate/PutRNGstate calls. Should I also include them in the helper function? Do I need to wrap every call to unif_rand with these calls, or is it ok that I've just used them at the beginning and end of the C code? I'm getting different results from different simulations, so what I've done appears ok, but I'm not sure I would be able to detect if every call to the helper function was returning the same result. Thanks, Tyler -- ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
