I wasn't asking a C++ question. Due to a type at 2am, (My fault), I thought there might have been a problem with Rcpp.
If you notice, I sent a redaction almost immediately after, asking everyone to ignore my previous e-mail. -- Noah Silverman UCLA Department of Statistics 8117 Math Sciences Building #8208 Los Angeles, CA 90095 On Sep 22, 2011, at 4:59 AM, Darren Cook wrote: >> I think this is the current prize-winner of inappropriate use of Rcpp... >> How about using R to sort your vector?! > > There is also the fact that the array is being created ready-sorted :-). > I assumed this was an artificially simplified example from real code. Or > a learning toy. > >> This isn't really an Rcpp question, but since you asked, .push_back() >> is a great way to slow yourself down. > > Or add data.reserve(20) [1] after creating the vector. Then push_back() > is very quick. > > BTW, apologies for replying to something off-topic. Perhaps, Noah, Stack > Overflow would be a better place for pure-C++ questions? (Any other > suggestions anyone?) > > Darren > > [1]: http://www.cplusplus.com/reference/stl/vector/reserve/ > >>> std::vector<double> data; >>> >>> for(int i=0; i != 20; i++){ >>> data.push_back(i); >>> } >>> std::sort(data.front(), data.back()); >>> return Rcpp::wrap(data); > > > > -- > Darren Cook, Software Researcher/Developer > > http://dcook.org/work/ (About me and my work) > http://dcook.org/blogs.html (My blogs and articles) > _______________________________________________ > Rcpp-devel mailing list > [email protected] > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
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