R help - Dec 2022 - Adding comment in C++ code for debugging purpose

?s 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 at 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

Hi Rui,

Unfortunately, the code Rcpp::Rcout <<
"---------->>>>>.My values" <<
"\n"; still not printing the value.

Regarding your second suggestion, R_Print("My values\n"); - where
should I put this statement?

On Sat, Dec 17, 2022 at 11:39 AM Rui Barradas <ruipbarradas at sapo.pt>
wrote:
>
> ?s 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 at 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
>
>
>
>