[Rcpp-devel] Convert R matrix to boost ublas?

[Charles Determan]

This was more of a curiosity question.  Armadillo and Eigen are great and I
will likely use them for most of my purposes.  I have just been exploring
more of the boost library and was wondering about it.  That said, it would
be a potentially useful exercise for me when I have some more time to
devote to it.  You mention starting with the as<>() and wrap() converters.
Is there any documentation on developing additional Rcpp functions or
should I just go in to the source and try to find my way around?

Regards,
Charles

On Tue, May 26, 2015 at 4:00 PM, Dirk Eddelbuettel <edd at debian.org> wrote:

>
> On 26 May 2015 at 15:32, Charles Determan wrote:
> | I have seen in the archives a discussion of converting a boost ublas
> matrix to
> | Rcpp (http://lists.r-forge.r-project.org/pipermail/rcpp-devel/2011-June/
> | 002402.html) but I didn't see anything about passing an R matrix in to a
> ublas
> | object.  There doesn't appear to be an 'as' method for it (unless I have
> | somehow overlooked it).  Any recommendations on efficiently getting an R
> matrix
> | in to a boost ublas matrix?
>
> Correct, as far as Rcpp is concerned uBlas is 'a new external entity' so
> you
> would have to start with as<>() and wrap() converters.
>
> Almost everybody I talked to about ublas "is aware" of it, yet nobody seems
> to like it all that much.   Any reason Armadillo or Eigen won't do for you?
>
> Dirk
>
> --
> http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
>
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