[Rcpp-devel] Returning an arma vec

Serguei Sokol serguei.sokol at gmail.com
Fri Dec 5 11:54:50 CET 2014

Le 04/12/2014 17:57, Romain François a écrit :
> Something like this:
> template <typename T>
> inline wrap( const arma::subview_col<double>& x ){
>      return wrap( arma::Mat<T>( x ) ) ;
> }
Interesting. If I do

inline SEXP wrap( const arma::vec& x ) {
     return wrap(Rcpp::NumericVector( x.begin(), x.end()));

then wrap(v) returns a vector to R, not a matrix n x 1
(v is a vec here) but wrap(v+1) still returns a matrix.
Is there a more universal way to say that any expression
resulting in vec should return a vector?


More information about the Rcpp-devel mailing list