Steven, In a case like this I would try to set up a fist minimal working example using just plain C++, and no R. Once that works, try it with R.
For Armadillo, the docs at http://arma.sourceforge.net/docs.html#Mat are your best shot. I presume you saw what it says about strict=true. Also, in double* p = static_cast<double*>( malloc( 30*sizeof(double) )); arma::mat M(p, 3,10, false, true ); // this works nicely you are going against the "Writing R Extensions" rule of mixing system malloc/free with R. That is generally a bad idea. If your intent is to keep memory 'fixed' and outside of R, you can use Bigmemory objects via external pointers (Rcpp::XPtr). This may be of interest: http://gallery.rcpp.org/articles/using-bigmemory-with-rcpp/ That should extend to wrapping Armadillo around such memory. After all, Armadillo behaves just _great_ with the R-allocated objects we pass back and forth. Hope this helps, Dirk -- Dirk Eddelbuettel | [email protected] | http://dirk.eddelbuettel.com _______________________________________________ Rcpp-devel mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
