[Rcpp-devel] exposing a C++ function to RInside
edd at debian.org
Sun Aug 19 00:46:34 CEST 2012
On 18 August 2012 at 14:08, Stephen J. Barr wrote:
| I have a quick design question. I am working on a program that uses RInside and
| RcppEigen, and I want to expose a function back to R. Specifically, I have a
| C++ function with the following signature:
| double nll_singleton(
| const VectorXd& theta,
| const MatrixXd& ua,
| const MatrixXd& ub,
| const MatrixXd& Xmat,
| const MatrixXd& Ymat);
| I would like to run R's optim over this function, where 'theta' is the vector
| that I am optimizing over. Would I use RCpp::InternalFunction for this?
Per rinside_sample9.cpp, possibly.
| nll_singleton is going to call MPI and I would rather do it this way than use
| mpi over R, if this is possible.
Doug Bates and have both (and indepdently) used Rcpp::XPtr to pass function
pointers around to C-level optimisation functions. My use case in my "port"
of DEoption to Rcpp, ie in RcppDE.
Good luck, Dirk
Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
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