On 4 June 2015 at 16:35, Wagner Bonat wrote:
| Dear all,
|
| I am reading the Rcpp book Chapter 7 - Modules
|
| The first example provide a C++ function
|
| ## C++ function
| double norm( double x, double y){
| return sqrt(x*x + y*y);
| }
|
| ## Simple wrapper function
| using namespace Rcpp;
| RcppExport SEXP norm_wrapper(SEXP x_, SEXP_y){
| double x = as<double>(x_), y = as<double>(y_);
| double res = norm(x,y);
| return wrap(res);
| }
|
| So, I have these two functions. But, I am lost, what should I do now?
Maybe consider the rest of the chapter?
Modules work best, I find, when you use a complete package.
Our unit tests contain one (see unitTests/testRcppModule) and you can also
set an example up via
R> Rcpp.package.skeleton(name="modTest", path="/tmp", module=TRUE)
Creating directories ...
Creating DESCRIPTION ...
Creating NAMESPACE ...
Creating Read-and-delete-me ...
Saving functions and data ...
Making help files ...
Done.
Further steps are described in '/tmp/modTest/Read-and-delete-me'.
Adding Rcpp settings
>> added Imports: Rcpp
>> added LinkingTo: Rcpp
>> added useDynLib directive to NAMESPACE
>> added import(methods, Rcpp) directive to NAMESPACE
>> added example src file using Rcpp attributes
>> compiled Rcpp attributes
>> added Rd file for rcpp_hello_world
>> copied the example module file
R>
Packages created with variants of package.skeleton have their own issues (of
not passing R CMD check) but that is an R issue, not an Rcpp issue...
Dirk
| The goal is make the function norm available in R.
|
| Probably, this is a very basic question, so if anyone know some material on
the
| internet that explain the missing parts here, please let me know.
|
| Thank you.
|
|
|
|
| --
| Wagner Hugo Bonat
|
----------------------------------------------------------------------------------------------
| Department of Mathematics and Computer Science (IMADA)
| University of Southern Denmark (SDU) and
| Laboratório de Estatística e Geoinformação (LEG)
| Universidade Federal do Paraná (UFPR)
|
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--
http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org
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