Earlier this week, Conrad Sanderson issued a minor bug fix release 2.0.2 of his Armadillo library which provides templated C++ code for linear algebra. We wrapped that into a new RcppArmadillo release 0.2.26 and shipped it to CRAN. Due to it being summer and the otherwise tirelesss human operator behind the curtain being on a well-deserved vacation, it sat in the incoming queue til this morning—but is now on CRAN.

Conrad did not rest either and just yesterday released version 2.1.91 as a first step towards a new 2.2.0 release sometime soon. And also yesterday, we wrapped that new version into RcppArmadillo release 0.2.27. With CRAN being back in full swing, we pushed it over there this morning and it already made its way into the repository.

The NEWS entries summarising the changes—which are exclusively upstream—are below:

0.2.27  2011-07-22

    o   Upgraded to Armadillo release 2.1.91 "v2.2 beta 1"

          * faster multiplication of small matrices
          * faster trans()
          * faster handling of submatrices by norm()
          * added economical singular value decomposition: svd_thin()
          * added circ_toeplitz()
          * added .is_colvec() & .is_rowvec()

0.2.26  2011-07-17

    o   Upgraded to Armadillo release 2.0.2 

          * fix for handling of conjugate transpose by as_scalar()
          * fix for handling of aliasing by diagmat()
          * fix for handling of empty matrices by symmatu()/symmatl()

Courtesy of CRANberries, there are also diffstat reports for 0.2.27 relative to 0.2.26 and for 0.2.26 relative to 0.2.25. 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.