On 13-04-24 1:36 PM, Jens Olofsson wrote:
Dear users of R
I have a subroutine in Fortran95, compiled to a DLL with gfortran in Cygwin
4.5.3.
We don't support Cygwin. You should use the gfortran in Rtools, and get
R to set the command line options for you, either by putting the code in
a package, or by using R CMD SHLIB Mango.f95.
Duncan Murdoch
The subroutine is:
subroutine MyPBP( S, p, N )
! Expose subroutine rtest to users of this DLL
!DEC$ ATTRIBUTES DLLEXPORT, C, REFERENCE, ALIAS: "mypbp_" ::mypbp
! This function computes the Poisson-Binomial distribution
! of size N using p
double precision, intent(inout) :: S(N+1)
double precision, intent(in) :: p(N)
integer, intent(in) :: N
double precision :: X(N+1)
integer i, j
!X=0
!S=0
X(1) = 1 - p(1)
X(2) = p(1)
do i = 2, N
S(1) = X(1)*(1-p(i))
do j = 2,i
S(j) = X(j-1)*p(i) + X(j)*(1-p(i))
end do
S(i+1) = X(i)*p(i)
X = S
if (i == N) then
S = X
end if
end do
end subroutine MyPBP
and it is saved into Mango.f95
I compile it from the bash shell using: gfortran-4 c- Mango.f95 and
gfortran-4 -shared -o Mango.dll Mango.o
I am on a Windows machine running Windows 7 with Intel i7.
I load the dll in a 32-bit R by dyn.load("Mango.dll"). Using getLoadedDLLs
I can see the DLL. However, is.loaded("Mango.dll") = FALSE. In addition, R
stop responding when I try .Fortran("MyPBP", as.numeric(S), as.numeric(p),
as.integer(N)),
where N<-5, S<-array(0,N+1) and p<- c(0.1, 0.2, 0.5, 0.8, 0.9).
What am I doing wrong?
Any ideas, thoughts and/or comments are highly appreciated.
Jens
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and provide commented, minimal, self-contained, reproducible code.
