a:class <- b


Usually in strongly typed languages, like C++, the type of a variable comes before the variable, e.g.: int x = 23 ; So x is declared of type int and assignd the value 23. Now, some languages do things differently, e.g. in julia: x::Int8 = 1000 or go : var i int = 1 ; So here is a curious thing we can do with R: `:<-` <- function(x…keep reading

A package about nothing


nothing is a package about nothing. The idea is that when you do require(nothing) you express that you don't need anything, and therefore nothing assumes you are fine just using the base package, so it detaches all other packages. > loadedNamespaces() [1] "base" "datasets" "devtools" "digest" "evaluate" "graphics" [7] "grDevices…keep reading

Rcpp11 3.1.1


R 3.1.1 was released a few days ago, and as part of the policy we are trying to follow for Rcpp11 releases, here is Rcpp11 3.1.1. Sorry for the 12 days delay, but I was away in California, and Rcpp11 travelled with me, so I could not properly test the package. I have now tested the package extensively on these combinations: OS X/clang at home. Ub…keep reading

Rcpp11 t-shirt sightseeing


While we wait for CRAN to process the release of Rcpp11 3.1.1, here are some news about the Rcpp11 t-shirt. With more than 40 attendees, the Rcpp11 tutorial was a success. I managed to distribute almost all t-shirts I printed for the occasions. I only have a few S sized men t-shirts left, but all women/S and men/M have found an owner. During the …keep reading

Can Rcpp fuse ?


One of the features of Rcpp11 people seemed to like during useR is the fuse function. fuse is somewhat similar to the c function in R. For the purpose of this post, let's simplify what fuse does, and just say that it takes several compatible vectors and fuses them together into one. // some vectors NumericVector a = {1.0, 2.3}, b…keep reading

R function call overhead in Rcpp(11)


Some people have asked for some facts about the differences between Rcpp11 and Rcpp, here is just one nugget. If you've been following the Rcpp world for some time, you might have seen comments like: Calling an R function from C++ is expensive. The need The reason why it is expensive is that we have to deal with two concurrent systems for erro…keep reading