[Rcpp-devel] Sparse matrix operations

Dirk Eddelbuettel edd at debian.org
Mon Feb 3 18:48:39 CET 2014

On 3 February 2014 at 10:23, French, Joshua wrote:
| Soren and Doug,
| Thanks for the info about the sparse matrices.  I'll give it a go and seen what
| happens.  If it works out, then perhaps I'll be able to provide a nice
| RcppGallery example.

Yes -- there isn't much yet in RcppArmadillo but this is expected to
grow. And CRAN now has rARPACK so we get cheaply to the object code too.

One last comment I should have made earlier: "dense" data from R comes over
cheaply as a SEXP; "sparse" will always require a copy.  Keep that in mind,
and on the margin don't believe anything any of us say but keep profiling and
measuring :)


Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com

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