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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 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@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, [EMAIL PROTECTED] > 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@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@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.
