On 18 August 2012 at 14:08, Stephen J. Barr wrote: | Hello, | | 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. Right. 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 | [email protected] | http://dirk.eddelbuettel.com _______________________________________________ Rcpp-devel mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
