[Rcpp-devel] pass an arma::mat& to a exported function in a package

[Dirk Eddelbuettel]

On 11 December 2013 at 18:53, riadh zaatour wrote:
| Hello,
| I have a code looking like this :
| 
| #include <RcppArmadillo.h>
| // [[Rcpp::depends(RcppArmadillo)]]
| using namespace Rcpp;
| 
| // [[Rcpp::export]]
| void func1(arma::mat& a) {
|     ....
| }
| this compiles and executes fine when used with sourceCpp().
| 
| Then I include this code in a package, I call compileAttributes(), then I build
| and install my package and all that works fine.
| Then, in R :
| 
| a=matrix(c(0,1,1,0),ncol=2,byrow=TRUE)
| func1(a)
| does not work and I receive the message
| 
| Error in .Call("pkgname_func1", PACKAGE = "pkgname", a,  :
|   "pkgname_func1" not available for .Call() for package "pkgname"
| 
| 
| If I put SEXP instead of arma::mat& as a parameter type in the exported function, all work fine.
| 
| Have I missed something for that to work with sourceCpp() and fail when within a package?

We cannot tell as you supplied incomplete sources.  

Package building via Rcpp Attributes and compileAttributes works for a lot of
people, as well as unit testing robots. so I suggest you sit down with the
corresponding vignette and work it out.  We can't from here.

Dirk
 
| Thanks a lot
| Riadh
| 
| 
| 
| 
| 
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-- 
Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com