Re: [R] console from tcltk

From: John Fox <jfox_at_mcmaster.ca>
Date: Wed, 14 May 2008 12:00:37 -0400

Dear Brian and Gabor,

When the Rcmdr "console.output" option is set to TRUE, the Rcmdr interface does something very much like this using cat() for R output, which it captures. The relevant code is in the doItAndPrint() function in the Rcmdr sources.

I hope this helps,
 John

> -----Original Message-----
> From: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org]
On
> Behalf Of Prof Brian Ripley
> Sent: May-14-08 11:10 AM
> To: Gabor Grothendieck
> Cc: R help forum
> Subject: Re: [R] console from tcltk
>
> I assume by 'console' you mean the Rgui window. That is not where stdout
> is connected -- it is not a file. As the CHANGES file for 2.7.0 says
>
> o When Rgui is launched from a terminal, C output from ill-formed
> packages that write to stdout or stderr rather than use
> Rprintf will appear in the terminal rather than being lost.
> (Only on XP or later.) This can be very handy for debugging C
> code in packages: just write debugging messages to stdout.
>
> And indeed that is what your example does. It also writes to the terminal
> from Rterm.
>
> Tcl is no different from any other C-based add-on in this respect.
>
> Note though that system() does provide a way to capture stdout to the Rgui
> window, so you can probably run tcl scripts via the tcl shell and capture
> their output.
>
> On Tue, 13 May 2008, Gabor Grothendieck wrote:
>
> > Is it possible to use the console from within tcltk?
> >
> >> library(tcltk)
> >> tcl("puts", "stdout", "Hello, World")
> > Error in structure(.External("dotTclObjv", objv, PACKAGE = "tcltk"),
> > class = "tclObj") :
> > [tcl] can not find channel named "stdout".
> >> .Tcl('puts stdout "Hello, World"')
> > Error in structure(.External("dotTcl", ..., PACKAGE = "tcltk"), class
> > = "tclObj") :
> > [tcl] can not find channel named "stdout".
> >> R.version.string # Windows Vista
> > [1] "R version 2.7.0 RC (2008-04-17 r45367)"
>
> Oh dear, not even the released version! Please update as the posting
> guide asked you to do before posting.
>
> > ______________________________________________
> > R-help_at_r-project.org mailing list
> > 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.
> >
>
> --
> Brian D. Ripley, ripley_at_stats.ox.ac.uk
> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
> University of Oxford, Tel: +44 1865 272861 (self)
> 1 South Parks Road, +44 1865 272866 (PA)
> Oxford OX1 3TG, UK Fax: +44 1865 272595
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> 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.



R-help_at_r-project.org mailing list
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. Received on Wed 14 May 2008 - 19:35:57 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Wed 14 May 2008 - 20:30:49 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive