Something like this:
template <typename T>
inline wrap( const arma::subview_col<double>& x ){
return wrap( arma::Mat<T>( x ) ) ;
}
(untested)
This would still wrap it as a matrix though as this is what subview_col
conceptually gives.
The only downside is that this is somewhat inefficient as it would have to
allocate memory for a arma::mat first and then copy that across to an
Rcpp::Matrix …
Romain
> Le 3 déc. 2014 à 22:41, Martyn Plummer <[email protected]> a écrit :
>
> You just need to put a new template specialization of "wrap" for the
> subview_col class in RcppArmadilloWrap.h based on the existing one for the
> subview class. And throw in one for subview_row for good measure.
>
> Martyn
> ________________________________________
> From: [email protected]
> [[email protected]] on behalf of Dirk
> Eddelbuettel [[email protected]]
> Sent: 03 December 2014 19:25
> To: Romain Francois
> Cc: [email protected]
> Subject: Re: [Rcpp-devel] Returning an arma vec
>
> On 3 December 2014 at 18:30, Romain Francois wrote:
> | > 2. If we replace the lines marked // x with
> | >
> | > return wrap(x.subvec(1, 2));
> | >
> | > then it fails with a compiler error.
> | >
> | > error: cannot convert 'const arma::subview_col<double>' to 'SEXP' in
> | > initialization
> |
> | This should be easy/trivial to fix for someone with the right skills.
>
> Sure. Maybe Gabor wants to give it a try.
>
> Dirk
>
> --
> http://dirk.eddelbuettel.com | @eddelbuettel | [email protected]
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