[R] Adding comment in C++ code for debugging purpose

Rui Barradas ru|pb@rr@d@@ @end|ng |rom @@po@pt
Sat Dec 17 07:09:31 CET 2022


Às 23:32 de 16/12/2022, Christofer Bogaso escreveu:
> Hi,
> 
> I am using an R package where there are some C++ code.
> 
> To check some intermediate values generated by that C++ code, I added
> a line like
> 
> std::cout << "My values";
> 
> Now with this modification, I next build a modified package (source) using
> 
> R CMD build
> 
> Next I install this modified package using install.packages() function
> 
> However during the run-time of the C++ code with above modification, I
> dont get any print with "My values"
> 
> Can you please help to understand why am not getting that printed?
> 
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

Hello,

If the package uses Rcpp try instead


Rcpp::Rcout << "My values" << "\n";   // or std::endl


More generally, there is also


R_Print("My values\n");



Hope this helps,

Rui Barradas



More information about the R-help mailing list