Dear People,
Here is something I do not understand. Consider
************************************************* foo.cc ************************************************* #include <iostream> #include <R.h> #include <Rinternals.h>
using std::cout; using std::endl;
extern "C"
{
SEXP printlst(SEXP lst);
}SEXP printlst(SEXP lst)
{
for(int i=0; i<length(lst); i++)
for(int j=0; j<length(VECTOR_ELT(lst, i)); j++)
cout << INTEGER(VECTOR_ELT(lst, i))[j] << endl;
return lst;
}
*************************************************dyn.load("foo.so")
.Call("printlst", list(c(1,2),c(3,4)))
0 1072693248 0 1074266112 [[1]] [1] 1 2
[[2]] [1] 3 4
If I replace INTEGER by REAL I get
dyn.load("foo.so")
.Call("printlst", list(c(1,2),c(3,4)))
1 2 3 4 [[1]] [1] 1 2
[[2]] [1] 3 4
as I would expect. I thought that if the vectors in the list could be regarded as integer vectors, they would be, but apparently not. Is there any way I can tell R to regard them as integer vectors?
Thanks. Faheem.
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