[Rcpp-devel] binding, combining vectors

[Andreas Alfons]

Hi Romain,

"bind" may be confusing to R users, because "cbind" and "rbind" exist
in R and return matrices. In my opinion, "combine" is a better option.

- Andreas


On Thu, Dec 13, 2012 at 10:01 AM, Romain Francois
<romain at r-enthusiasts.com> wrote:
> Hello,
>
> I'd like to add a functionality to "bind" vectors of the same type (well
> sugar expressions really, but let's say it is vectors for the sake of
> this email).
>
> So essentially I'd like something similar to what "c" does in R :
>
>  > c( letters, letters )
>   [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p"
> "q" "r" "s"
> [20] "t" "u" "v" "w" "x" "y" "z" "a" "b" "c" "d" "e" "f" "g" "h" "i" "j"
> "k" "l"
> [39] "m" "n" "o" "p" "q" "r" "s" "t" "u" "v" "w" "x" "y" "z"
>
>
> I don't want to call it "c", and I'd like suggestions : combine, bind ?
>
> The idea is to avoid writing code like this:
>
> CharacterVector x, y ;
> CharacterVector z( x.size() + y.size() ) ;
> int i=0;
> for( ; i<x.size(); i++) z[i] = x[i] ;
> for( int j=0; j<y.size(); i++, j++) z[i] = y[j] ;
>
> I know it is not a big deal for people to write this code, but for
> example this does not handle the names of the elements, ... and
> internally I can use more efficient code
>
> Romain
>
> --
> Romain Francois
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-- 
Andreas Alfons
Faculty of Business and Economics, KU Leuven
www.econ.kuleuven.be/andreas.alfons/public/