Reduce in Rcpp11

May 23, 2014
By

[This article was first published on R Enthusiast and R/C++ hero, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

And now for something completely difference, the reduce function, doing something similar to what the Reduce function does in R:

#include 
using namespace Rcpp ;

// [[Rcpp::export]]
double reduce_example(NumericVector x ){  
    auto add   = [](double a, double b){ return a + b ;} ;
    return reduce(x, add ) ;
}

/*** R
  x <- 1:10
  reduce_example(x)
*/

Giving:

$ Rcpp11Script /tmp/reduce.cpp

> x <- 1:10

> reduce_example(x)
[1] 55

To leave a comment for the author, please follow the link and comment on their blog: R Enthusiast and R/C++ hero.

R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.



If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Search R-bloggers

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)