Hi Ben, Thanks for your answer. I looked at the status of VLA on the GCC homepage and it appears to be "broken". [1] Do you think that the code below still works? Or are you using a different compliler?
Thanks, Tamas [1] http://gcc.gnu.org/c99status.html On Sun, Nov 19, 2006 at 09:55:17AM -0500, Benjamin Tyner wrote: > Tamas, > > You could write convenience functions, but I have used the C99 mechanism > for variable length arrays with no problems calling from R. One thing > you have to keep in mind though is that (as far as I know) the > dimensions must be passed before the array reference. So for example, > > r <- .C("foo", > as.integer(ni), > as.integer(nj), > x = double(ni * nj), > ...) > > with your function defined as > > void foo(int *ni, int *nj, double x[*ni][*nj]) > { > ... > > Then in C you can access elements of x via x[3][4], for example. > > Ben > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
