I want to integrate Fortran code into my R Package. In order to practice, I am trying to use ´inline´ with Fortran code. I can create the cfunction, however, When I try to run it, I get segfault
library(inline)
src = "
integer i, j, k
do k = 1, prok
do j = 1, ncolv
do i = 1, nrowv
emis(i, j,k) = veh(i,j) * lkm(i) * ef(j)*pro(k)
end do
end do
end do
"
work <- cfunction(sig = signature(
nrowv="integer",
ncolv = "integer",
prok = "integer",
veh="numeric",
lkm = "numeric",
ef = "numeric",
pro = "numeric",
emis = "numeric"),
implicit = "none",
dim = c("", "", "", "(nrowv,ncolv)",
"(nrowv)","(ncolv)","(prok)","(nrowv,ncolv,prok)"),
src,
language="F95",
verbose = F)
work(nrowv = 3, ncolv = 2, prok = 3, veh = 1:6, lkm = 1:3, ef = 1:2, pro = 1:4, emis = as.numeric(1))
gives: Segmentation fault (core dumped) I added the print of the work function to see how is the subroutine.
print(work)
An object of class 'CFunc'
function (nrowv, ncolv, prok, veh, lkm, ef, pro, emis)
.Primitive(".Fortran")(<pointer: 0x7ffac77db100>, nrowv = as.integer(nrowv),
ncolv = as.integer(ncolv), prok = as.integer(prok), veh = as.double(veh),
lkm = as.double(lkm), ef = as.double(ef), pro = as.double(pro),
emis = as.double(emis))
<environment: 0x55ab99679e70>
code:
1:
2: SUBROUTINE file77f62087457e ( nrowv, ncolv, prok, veh, lkm, ef, pro, emis )
3: IMPLICIT none
4: INTEGER nrowv
5: INTEGER ncolv
6: INTEGER prok
7: DOUBLE PRECISION veh(nrowv,ncolv)
8: DOUBLE PRECISION lkm(nrowv)
9: DOUBLE PRECISION ef(ncolv)
10: DOUBLE PRECISION pro(prok)
11: DOUBLE PRECISION emis(nrowv,ncolv,prok)
12:
13: integer i, j, k
14: do k = 1, prok
15: do j = 1, ncolv
16: do i = 1, nrowv
17: emis(i, j,k) = veh(i,j) * lkm(i) * ef(j)*pro(k)
18: end do
19: end do
20: end do
21:
22: RETURN
23: END
24: