If you are using the Windows GUI you can turn 'output buffering' on and off by either typing Ctrl-W or by using the Misc>Output Buffering menu item. When output buffering is off you may not need to add flush.console() to your code.
Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of > j.delashe...@ed.ac.uk > Sent: Friday, October 22, 2010 4:00 AM > To: Joshua Wiley > Cc: R-help > Subject: Re: [R] printing a variable during a loop > > > Thank you for this! > > I had also wanted in the past to do this, and ended up writing dummy > files with informative names to a folder I set to collect these > messages, so I'd check the folder to see the new files being > generated... It did the job, and at the same time I could see > how long > it took for my program to reach certain points (filer creation time) > but not the most elegant! I didn't know about flush.console() > > However I used that approach to generate some diagnostic files, so > that if a complex process broke (sometimes it involved > several system > calls to external programs) I had good information about what the > program was doing and at what stage it failed. I created a vector to > store teh names of all teh files being generated and they could be > removed automatically afterwards. > > Not what the OP wanted, but this strategy may be useful for > certain tasks. > > Jose > > > Quoting Joshua Wiley <jwiley.ps...@gmail.com>: > > > On Thu, Oct 21, 2010 at 12:03 PM, David Winsemius > > <dwinsem...@comcast.net> wrote: > >> > >> On Oct 21, 2010, at 8:58 PM, Antonio Olinto wrote: > >> > >>> Thanks Adrienne, but I still in doubt. The behavior of > print and message > >>> looks the same. > >>> > >>> Nothing is displayed on the screen after minutes of > routine processing . > >>> All values of "i" are displayed only when I press the > stop button > >>> (I'm under > >>> Windows) or when "i" reaches the maximum value. > >>> > >> > >> In the past people have needed to use flush.console() to > get output to the > >> screen. Unable to test since A) I'm not running your OS, and B) no > >> reproducible example offered. > > > > I am running your OS (though it would also be nice if you > reported the > > results of sessionInfo() ). In any case, this worked for me on R > > 2.12.0 (i386-pc-mingw32): > > > > for(i in 1:6) {Sys.sleep(3); print(i); flush.console()} > > > > For your problem, I imagine something like (though untested > because no data): > > > > for (i in 1:23194) { > > > dat.stat[i,c(2:8)]<-quantile(dat.bat[BL==block[i],2],prob=c(0, 0.025,0.25,0.5,0.75,0.975,1)) > > print(i) > > flush.console() > > } > > > >> > >>> Thanks again, > >>> > >>> Antônio Olitno > >>> > >>> > >>> Citando Adrienne Wootten <amwoo...@ncsu.edu>: > >>> > >>>> instead of print use this > >>>> > >>>> message(i) > >>>> > >>>> the message command is used for things like this and it > will print the > >>>> value > >>>> of i as you are looping through, but you can also do this: > >>>> > >>>> message("Counter value is: ",i) > >>>> > >>>> which returns for i = 20 for example > >>>> > >>>> "Counter value is 20" > >>>> > >>>> for more check out the message help section in the html > >>>> > >>>> ? message > >>>> > >>>> > >>>> Adrienne Wootten > >>>> NCSU > >>>> > >>>> On Thu, Oct 21, 2010 at 2:05 PM, Antonio Olinto > >>>> <aolint...@bignet.com.br>wrote: > >>>> > >>>>> Hello, > >>>>> > >>>>> About looping, consider the example: > >>>>> > >>>>> for (i in 1:23194) { > >>>>> > >>>>> > >>>>> > dat.stat[i,c(2:8)]<-quantile(dat.bat[BL==block[i],2],prob=c(0, 0.025,0.25,0.5,0.75,0.975,1)) > >>>>> print(i) > >>>>> } > >>>>> > >>>>> I'd like to have the value of "i" printed for each loop > (step). As I > >>>>> could > >>>>> see the values of "i" are shown on screen only after > all the work is > >>>>> done. > >>>>> > >>>>> Thanks in advance for any suggestion. > >>>>> > >>>>> Best regards, > >>>>> > >>>>> Antonio > >>> > >> -- > >> > >> David Winsemius, MD > >> West Hartford, CT > >> > >> ______________________________________________ > >> 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. > >> > > > > > > > > -- > > Joshua Wiley > > Ph.D. Student, Health Psychology > > University of California, Los Angeles > > http://www.joshuawiley.com/ > > > > ______________________________________________ > > 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. > > > > > > -- > Dr. Jose I. de las Heras Email: > j.delashe...@ed.ac.uk > The Wellcome Trust Centre for Cell Biology Phone: +44 > (0)131 6507095 > Institute for Cell & Molecular Biology Fax: +44 > (0)131 6507360 > Swann Building, Mayfield Road > University of Edinburgh > Edinburgh EH9 3JR > UK > > > -- > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > > ______________________________________________ > 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.
