Hi Florian, On 6 May 2014 at 09:35, Florian Burkart wrote: | Hi, | | I have been creating lists of lists with | | return Rcpp::List::create(Rcpp::Named("vec") = someVector, | Rcpp::Named("lst") = someList, | Rcpp::Named("vec2") = someOtherVector);
Yes, it is a very common idiom as lists are the R structure used for nesting object with varying types or sizes. | or to follow Romain: | | using namespace Rcpp ; | return List::create( | _["vec"] = someVector, | _["lst"] = someList, | _["vec2"] = someOtherVector | ) ; | | But how do I convert the following into a list of lists? | | std::vector<std::string> m_column_headers; | std::vector<std::vector<OptDouble> > m_vectors_of_values; You probably have to copy at some point. You could also use Rcpp types as the first (std::vector<std::string>) could be an Rcpp::CharacterVector (which is a vector of strings, not single char); the second could be a Rcpp::NumericMatrix. There is some support for as<> and wrap() between these, but there is no function doing magic of the 'here, just convert these random two types I listed'. It all depends. Hope this helps, Dirk -- Dirk Eddelbuettel | e...@debian.org | http://dirk.eddelbuettel.com _______________________________________________ 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