[Rcpp-devel] Question on syntactic sugar

[Dirk Eddelbuettel]

On 5 January 2012 at 07:41, Gregor Kastner wrote:
| Dear all,
| 
| I have a (small) vector "r" containing values and a (large) vector
| "index" containing indices. Is there an easy way to select the elements of
| "r" that are indexed by "index"?
| 
| I.e., is there a way to reproduce the following R code with Rcpp (without
| using loops)?
| 
| r <- c(1,11,111)
| index <- c(2,2,1)
| r[index]

That was just discussed _yesterday_ on this list.

And no, I don't think it is. Would be nice -- patches welcome.

Dirk

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