Hello,
Your question is more appropriate on the R-devel mailing list.
Le 03/12/10 00:41, Oleksandr Dyklevych a écrit :
Dear sir\madam!
I'm trying to speed up my R code by writing quite simple dll's in C. But
I faced some problems, and I cannot determine their source.
#include <Rinternals.h>
SEXP mycombin(SEXP N, SEXP k){
int i, *j, *l, c;
j = INTEGER(k);l = INTEGER(N);
c = 1;
if(j[0] > 0 && j[0] < l[0]){
if(j[0] <= l[0] - j[0]){
for(i = l[0]; i >= l[0] - j[0] + 1; i--){
c = c * i / (l[0] - i + 1);
}
}
else{
for(i = l[0]; i <= j[0] + 1; i++){
c = c * i / (l[0] - i + 1);
}
}
}
return ScalarInteger(c);
}
But, when I try to compile it
What does that mean ? What did you try ?
R CMD SHLIB mycomin.c
definitely works for me. What part of "Writing R Extensions" was not clear ?
Romain
I have 5 errors, and all of them come form
linker and say next (Code::Blocks):
||=== mcb2, Release ===|
obj\Release\conv.o:conv.c|| undefined reference to `INTEGER'|
obj\Release\conv.o:conv.c|| undefined reference to `INTEGER'|
obj\Release\conv.o:conv.c|| undefined reference to `Rf_ScalarInteger'|
obj\Release\conv.o:conv.c|| undefined reference to `Rf_ScalarInteger'|
obj\Release\conv.o:conv.c|| undefined reference to `Rf_ScalarInteger'|
||=== Build finished: 5 errors, 0 warnings ===|
I found out that I need to link Rdll.lib, but to make it I should use
these instructions
make R.exp
lib /def:R.exp /out:Rdll.lib
but i cannot figure out where I should use them.
I'm trying from here C:\Rtools\src\gnuwin32 but each time i get
make: *** No rule to make target `R.exp'. Stop.
So where should I state this rule and which rule?...
Will you help me, please, to "connect" my C compiler to R?
Best regards,
Oleksandr
--
Romain Francois
Professional R Enthusiast
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http://romainfrancois.blog.free.fr
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