[Rcpp-devel] Rcpp matrix generation crashes my R session

Dirk Eddelbuettel edd at debian.org
Sat Jun 22 21:28:43 CEST 2013

On 22 June 2013 at 20:34, Marc Jekel wrote:
| There was indeed a problem with the matrix index, thank you Dirk! And 
| using  "return Rcpp::wrap(weightsNet)" instead of "return weightsNet" 
| helped to fix a problem when I created a R-package with the function 
| included, thank you Simon!

You do not need wrap(X) when X is an Rcpp object such as a NumericMatrix; the
wrap function is called automagically for you (and we call that implicit wrap

As Dale pointed out to you, you generally want simpler and simpler
sub-expression of your problem.  And if and when you post a complete example
as you did (which is good -- thumbs up!) also post a mock data generator in R
that allows us to call it to actually make it __reproducible__.


Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com

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