[R] Problem when calling FORTRAN subroutine (dll)

[Berwin A Turlach]

G'day Krishna,

On Wed, 12 Mar 2008 08:59:30 -0700 (PDT)
"poolloopus at yahoo.com" <poolloopus at yahoo.com> wrote:

> > output<-.C("smooth_",as.integer(NROW),as.integer(NCOL),as.integer(NDIM),as.real(X),as.real(W),as.real(A),as.real(B),as.integer(NCYCLE),as.integer(ICYCLE),as.real(G),as.real(EPS),as.integer(IFAULT))

1) You are calling FORTRAN code and not C code, so why are you using .C
instead of .Fortran?

2) Why do you append an underscore to the name of the routine that you
are using? 

3) According to the FORTRAN source, the variables are defined as
REALs, not as DOUBLE PRECISION.  R, by default expects to interface to
DOUBLE PRECISION.  If you want to interface to REALs, you have to use
as.single or set the storage mode to single.

Details regarding all these points are in the "Writing R Extensions"
manual which I would strongly recommend you to study.

Cheers,

	Berwin 

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