[Rcpp-devel] trans() changed in latest RcppArmadillo
I was a bit optimistic yesterday; I have not yet been able to produce a minimal example but it seems trans/strans was not the end of the story in my code. Something else was broken with the change to 0.2.21.Thankfully the end results are very visibly wrong. Best regards, Baptiste
On 31 May 2011 07:02, Savitsky, Terrance <savitsky at rand.org> wrote:
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.rcpp at gmail.com] Sent: Monday, May 30, 2011 6:34 AM To: rcpp-devel at 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
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