At least in the Windows version, there is an option in the menu that might resolve your issue: In Rgui, Under Misc, there is the option "Buffered Output" which is checked by default. Unchecking it seems to make sure that messages, print statements and cat output is rendered immediately. A likely consequence will be that your code will run somewhat slower.
For using some output as 'progress control' you definitely want to turn the option off. Nick Sabbe -- ping: nick.sa...@ugent.be link: http://biomath.ugent.be wink: A1.056, Coupure Links 653, 9000 Gent ring: 09/264.59.36 -- Do Not Disapprove -----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: vrijdag 22 oktober 2010 13:00 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.
