August 15, 2013
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(This article was first published on Thinking inside the box , and kindly contributed to R-bloggers)

A new minor release 3.910.0 of Armadillo came out a few days ago. A new RcppArmadillo release 0.3.910.0 was provided rightaway, and after a brief back-and-forth with CRAN (mostly having to do with the non-standard vignette corresponding to our CSDA paper and its use of LaTeX minted) is now on CRAN and also in Debian.

Conrad made some standard cross-products faster, and added vectorise(), any() and all() functions. We also added an extension header for more automated conversion of sparse matrices (which is already used by a post on the Rcpp Gallery).

The complete list of changes is below.

#### Changes in RcppArmadillo version 0.3.910.0 (2013-08-12)

• faster multiplication of a matrix with a transpose of itself, ie. X*X.t() and X.t()*X

• added vectorise() for reshaping matrices into vectors

• added all() and any() for indicating presence of elements satisfying a relational condition

• Added conversion support for sparse matrices (of type double) created by the Matrix package as class dgCMatrix

• Moved vignette sources from inst/doc to vignettes; set BuildVignettes: FALSE as the minted mode for LaTeX upsets the CRAN builders.

Courtesy of CRANberries, there is also a diffstat report for the most recent release As always, more detailed information is on the RcppArmadillo page. Questions, comments etc should go to the rcpp-devel mailing list off the R-Forge page.