This is not a well-posed Rcpp question as - matrix and data.frame are _fundamentally_ two different data types
- matrix being _one_ and only one storage type, or class, stored as one vector with dimension attribute of size two for rows and cols; this makes it _efficient_ and you will see a matrix type used quite a bit in internal R functions - data.frame being a special case of the catch-all type list with each column being of same length but possibly different types -- and for that reason we do not have too much tooling for this 'list of vectors' in Rcpp besides the basics So in short you may want to work out first what you want you algorithm to be and maybe use higher-level converters in R to accomodate. Dirk -- 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
