Dear R People:
Here is something that I am sure is very simple. I'm just trying to
re-create the C convolution example in the Extensions manual. Here is
the subroutine:
void convolve(double *a, int *na, double *b, int *nb, double *ab)
{
R_len_t i, j, nab = *na + *nb - 1;
for(i = 0; i < nab; i++)
ab[i] = 0.0;
for(i = 0; i < *na; i++)
for(j = 0; j < *nb; j++)
ab[i + j] += a[i] * b[j];
}
And here are the results from trying to compile:
erin@ubuntu:~$ R CMD SHLIB convolve.c
gcc -std=gnu99 -I/usr/share/R/include -fpic -O3 -pipe -g -c
convolve.c -o convolve.o
convolve.c: In function ‘convolve’:
convolve.c:3:1: error: unknown type name ‘R_len_t’
make: *** [convolve.o] Error 1
What is wrong, please?
This is on Ubuntu 11.10 with R-2.14.2. I'm sure that it's totally goofy.
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: [email protected]
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
