[Rcpp-devel] tracking volatile bug

[Dirk Eddelbuettel]

Serguei,

First, I think we mentioned to you after your first post on rex2arma that all
serious Rcpp development is generally done in packages.  You should probably
embrace that mode too. Many of us prefer it.

Second, 'expm' does not need to be reimplemented.  See my RcppKalman package
(on GitHub only) to see how to access the expm code (from the package of the
same name by Goulet, Dutang,Maechler et all -- all serious people) directly
from RcppArmadillo.

Third, your code calls back into R via Rcpp::Environment. As a first test I'd
try to do without.

The recommendation usually is "minimally self-contained reproducible
examples" for bug report.  I, like many other people, have found that a good
number of times the "bug" becomes apparent while preparing such a report.

Maybe someone will have time to go through your somewhat-non-standard in detail.

Cheers,  Dirk

-- 
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org