Dirk Eddelbuettel <e...@debian.org> writes: > On 12 August 2012 at 07:56, Michael Weylandt wrote: > | On Aug 12, 2012, at 6:09 AM, Thorsten Jolitz > | <tjol...@googlemail.com> wrote: > | > Thorsten Jolitz <tjol...@googlemail.com> writes: > | > Let me reformulate my question (since I managed to make 'native' calls > | > to C functions in libR by now): > | > I still wonder whats 'in there' in libR - only the core C functions, or > | > all the functions written in R itself too? And what packages are > | > included? > | > | Just C functions. > > Moreover, many of these are marked 'non visible' and cannot be accessed. You > probably want to consider > > a) the standalone R math library, available eg on Debian/Ubuntu as package > r-mathlib which gets you a subset of R (distribution functions, random > numbers, ...) for use in other programs, or > > b) the embedding API of R > > Both of these are documented in the 'Writing R Extension' manual that came > with R. > > If you are interested in b), you may also want to look at the RInside project > which makes embedding a lot easier. The simplest example is just > > #include <RInside.h> // for the embedded R via RInside > int main(int argc, char *argv[]) { > RInside R(argc, argv); // create an embedded R instance > R["txt"] = "Hello, world!\n"; // assign a char* (string) to 'txt' > R.parseEvalQ("cat(txt)"); // eval the init string, ignoring > any returns > exit(0); > } > > which passes a string to the embedded R interpreter and calls an R function > to display it. You can send full R objects back and forth thanks to Rcpp, and > there are over a dozen examples included in the packages, as well as more > advanced use of embedded R within the context of MPI (for parallel > computing), Qt (for GUIs and much more) or Wt (for web applications).
Thanks, that looks very interesting indeed. -- cheers, Thorsten ______________________________________________ R-help@r-project.org 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.