[Rcpp-devel] clarification of interaction between RInside and RcppEigen

[Stephen J. Barr]

Ah, that made it click. Thank you so much for the help.

On Tue, Aug 7, 2012 at 2:56 PM, Dirk Eddelbuettel <edd at debian.org> wrote:

>
> On 7 August 2012 at 14:43, Stephen J. Barr wrote:
> | Thanks for the pointer to sugar.
> |
> | I was just trying to think of a simple example. So my C++ code will be
> | essentially:
> |
> | int main() {
> |
> |     RInside R(argc, argv);          // create an embedded R instance
> |     R.parseEval("X = generateSomeMatrix()");
>
> You need something like we use in the example rinside_sample1.cpp I already
> pointed you too:
>
>     Rcpp::NumericVector v = R.parseEval(str);   // eval string, Z then
> assigned to num. vec
>
> as you need __assign__ the result of the parseEval() to something.
>
> This could be as generic as
>
>     SEXP mytmp = R.parseEval("X = generateSomeMatrix()");
>
> and you can then use mytmp instantiate an RcppEigen object as you would
> have
> if the object had been passed down from R.
>
> Hth, Dirk
>
> --
> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
>
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