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Dear R-Help,
as I am not sure where to put this suggestion for improving the
documentation in "Writing R extensions" Section 6.6 (Calling C from
FORTRAN and vice versa) I send it to R-Help as suggested by the R Bug
Report page.
In Sect 6.6 an example is given on how to create .f and .c file in order
to call C from Fortran and vice versa. For better readability and for
preventing ppl calling the .c and the .f file the same base name
(causing "multiple definitions of symbol") I suggest that the docu
should provide file names for the two example programs, e.g.:
frand.f:
subroutine testit()
double precision normrnd, x
call rndstart()
x = normrnd()
call dblepr("X was", 5, x, 1)
call rndend()
end
frand-helper.c:
#include <R.h>
/* Fortran */
void F77_SUB(rndstart)(void) { GetRNGstate(); }
void F77_SUB(rndend)(void) { PutRNGstate(); }
double F77_SUB(normrnd)(void) { return norm_rand(); }
As a further suggestion, it would also be nice to provide the call for
generating the dynamic library at this point:
R CMD SHLIB frand.f frand-helper.c .
At least this would have helped me in trying to get things to work, but
again - its just a suggestion.
Best regards,
Michael
- --
Michael H?hle, Ph.D.
Department of Statistics
University of Munich
Ludwigstrasse 33
80539 Munich
Germany
Phone: +49 89 2180 6404
Fax: +49 89 2180 5040
Email: hoehle at stat.uni-muenchen.de
Homepage: http://www.stat.uni-muenchen.de/~hoehle
PGP public key id: 0xA9589121
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