[R-pkg-devel] stdout in R package

[Gábor Csárdi]

Hi Pieter,

search for 'Rprintf' in the 'Writing R extensions' manual:
http://cran.r-project.org/doc/manuals/r-release/R-exts.html

Gabor

On Tue, May 26, 2015 at 9:55 AM, Pieter Eendebak <pieter.eendebak at gmail.com>
wrote:

> Dear developers,
>
> For an R package I am including some code I have written previously which
> uses stdout, stderr and printf. The command R CMD check [packagename] gives
> me warnings about these items. What is the proper way to print output in an
> R package?
>
> The documentation mentions that output is shpuld be written to the console.
> Does this mean printing using printf only?
>
> In my code I have several constructions like:
>
> void print_structure(FILE *fid, object_t object);
> void print_structure(object_t object) {
>    print_structure(stdout, object);
> }
> void print_structure(const char *filename, object_t object) {
>    FILE *fid = fopen(filename, 'wt');
>    print_structure(fid, object);
>    fclose(fid);
> }
>
> How can I keep using this code in R without duplicating the print_structure
> function (once for output to console, and once for output to file)?
>
> With kind regards,
> Pieter Eendebak
>
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>
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