On 19 May 2016 at 12:47, Paul Saary wrote: | Thank you for your reply, | | > If you always use vector< vector< double > > then I would start with | > Rcpp::NumericMatrix, or arma::mat. | | The problem is, that I want to offer the user a choice of using also | data.frames and not just Matrices. So I can not really decide, with what | I start, or am I wrong?
Yes :) A data.frame is simply not a matrix. It allows different types. Which you cannot represent here. | Regarding the use of Rcpp:function: | As the R objects used are very large (many MB to some GB), I would like | to do the transformation into a usable format, in my case into the | vector< vector< double > >, in CPP, as I imagine it to be much faster. Imagination can be a dangerous thing. Most of us prefer profiling. | I will have look into armadillo, but I hoped to avoid loading another | library, to reduce the depencies of my script/package. Please do look into it. It is worth it. And the added size, relative to the footprint you already have with R, is marginal. And there is none at run-time -- C++ and all that. Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
