reduce in Rcpp11

May 23, 2014

(This article was first published on R Enthusiast and R/C++ hero, and kindly contributed to R-bloggers)

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

#include <Rcpp.h>
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


$ 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. offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...

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.


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)