[R] Calling rand_unif() from fortran
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Mon Jul 16 08:39:37 CEST 2001
On Sat, 14 Jul 2001, Gregory R. Warnes wrote:
> What is the necesary incantation to call rand_unif() from a fortran
> Just inserting rand_unif() into the fortran code compiles OK, but won't
> > dyn.load("forest.so")
> Error in dyn.load(x, as.logical(local), as.logical(now)) :
> unable to load shared library "/home/warnes/R/forest/forest.so":
> /home/warnes/R/forest/forest.so: undefined symbol: unif_rand__
> Do I have to write a bit of C code to "wrap" the call using F77_SUB?
Yes. In general you cannot call C entry points from Fortran. That
includes GetRNGstate and PutRNGstate which you *must* use too.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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