The short NEWS file extract follows below.
And courtesy of CRANberries, here is the diff to the previous release.0.2.21 2011-05-27 o Upgraded to Armadillo release 1.99.3 "v2.0 beta 3" * stricter size checking for row and column vectors * added .count() member function to running_stat and running_stat_vec
Diff between RcppArmadillo versions 0.2.20 dated 2011-05-26 and 0.2.21 dated 2011-05-28 ChangeLog | 8 DESCRIPTION | 8 inst/NEWS | 7 inst/include/armadillo | 2 inst/include/armadillo_bits/Col_meat.hpp | 13 - inst/include/armadillo_bits/Mat_bones.hpp | 2 inst/include/armadillo_bits/Mat_meat.hpp | 147 +++++++------- inst/include/armadillo_bits/Row_meat.hpp | 11 - inst/include/armadillo_bits/arma_version.hpp | 4 inst/include/armadillo_bits/diagview_bones.hpp | 2 inst/include/armadillo_bits/diagview_meat.hpp | 4 inst/include/armadillo_bits/diskio_meat.hpp | 40 ++-- inst/include/armadillo_bits/fn_accu.hpp | 167 ++++++++++------- inst/include/armadillo_bits/fn_det.hpp | 10 - inst/include/armadillo_bits/fn_prod.hpp | 15 + inst/include/armadillo_bits/op_dot_bones.hpp | 9 inst/include/armadillo_bits/op_dot_meat.hpp | 119 +++++++++--- inst/include/armadillo_bits/promote_type.hpp | 24 +- inst/include/armadillo_bits/running_stat_bones.hpp | 16 - inst/include/armadillo_bits/running_stat_meat.hpp | 47 ++-- inst/include/armadillo_bits/running_stat_vec_bones.hpp | 6 inst/include/armadillo_bits/running_stat_vec_meat.hpp | 21 +- inst/include/armadillo_bits/subview_meat.hpp | 23 +- inst/include/armadillo_bits/traits.hpp | 16 - inst/include/armadillo_bits/typedef_u64.hpp | 21 -- 25 files changed, 446 insertions(+), 296 deletions(-)
More information is on the RcppArmadillo page. Questions, comments etc should go to the rcpp-devel mailing list off the R-Forge page.