Dr. Sanderson, I've been able to verify that my issue resides in the inv() function (that I typically apply to small p x p matrices, where p = 3 - 10). In particular, the new version/algorithm induces numerical instability. I've not yet tested that the results of the inv() computation are generally accurate, only that they are not numerically robust in comparison to 0.2.19. I'm up against a deadline, so I switched back to 0.2.19, which resolves my problem, for now, but will provide a reproducible example when finished with my work.
Terrance -----Original Message----- From: Conrad Sand [mailto:conradsand.r...@gmail.com] Sent: Monday, May 30, 2011 6:34 AM To: rcpp-de...@r-forge.wu-wien.ac.at Cc: Savitsky, Terrance Subject: Re: trans() changed in latest RcppArmadillo On 30 May 2011, Terrance Savitsky wrote: > Hello, After upgrading to the 0.2.21 release of RcppArmadillo, my > previously working code (across many functions) ceased working (on a > Windows XP installation). I re-installed the previous version (0.2.20) > from CRAN (via a server location not yet updated to 0.2.21); didn't fix it. > The timing may be a coincidence, though reading the post on > trans() encourages me to make this post. While I use 'trans' across my > functions, it is not applied on complex-valued matrices; only > real-valued. So the prior post wouldn't explain my issue. Hi, I'm the main author of Armadillo. I'm interested in hearing about all regressions -- can you provide more details ? There have been a lot of changes between Armadillo 1.2 and the latest beta (1.99.3). I'd like to shake out all known bugs before releasing 2.0. Cheers, Conrad -- Dr Conrad Sanderson : Sr Research Scientist : NICTA : http://arma.sf.net/cs __________________________________________________________________________ This email message is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
