Dear Martin and Jon,
I can reproduce this problem in the Windows GUI, where I observed it using
Jon's program after 75 iterations. I didn't observe the problem in a Windows
terminal or under RStudio, letting the program run for more than 200 iterations
in each case.
My system and session info:
------------- snip ---------
> Sys.info()
sysname release version nodename
"Windows" "10 x64" "build 14393" "JOHN-CARBON-X1"
machine login user effective_user
"x86-64" "John Fox" "John Fox" "John Fox"
> sessionInfo()
R version 3.3.2 (2016-10-31)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 14393)
locale:
[1] LC_COLLATE=English_Canada.1252 LC_CTYPE=English_Canada.1252
[3] LC_MONETARY=English_Canada.1252 LC_NUMERIC=C
[5] LC_TIME=English_Canada.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
------------- snip ---------
I hope this helps,
John
-----------------------------
John Fox, Professor
McMaster University
Hamilton, Ontario
Canada L8S 4M4
Web: socserv.mcmaster.ca/jfox
> -----Original Message-----
> From: R-devel [mailto:r-devel-boun...@r-project.org] On Behalf Of Martin
> Maechler
> Sent: December 7, 2016 5:58 AM
> To: Jon Skoien <jon.sko...@jrc.ec.europa.eu>
> Cc: r-devel@r-project.org
> Subject: Re: [Rd] Strange behavior when using progress bar (Fwd: Re: [R] The
> code itself disappears after starting to execute the for loop)
>
> >>>>> Jon Skoien <jon.sko...@jrc.ec.europa.eu>
> >>>>> on Wed, 7 Dec 2016 11:04:04 +0100 writes:
>
> > I would like to ask once more if this is reproducible also for others?
> > If yes, should I submit it as a bug-report?
>
> > Best,
> > Jon
>
> Please Windows users .. this is possibly only for you!
>
> Note that I do *not* see problems on Linux (in ESS; did not try RStudio).
>
> Please also indicate in which form you are running R.
> Here it does depend if this is inside RStudio, ESS, the "Windows GUI", the
> "Windows terminal", ...
>
> Martin Maechler,
> ETH Zurich
>
>
> > On 11/28/2016 11:26 AM, Jon Skoien wrote:
> >> I first answered to the email below in r-help, but as I did not see
> >> any response, and it looks like a bug/unwanted behavior, I am also
> >> posting here. I have observed this in RGui, whereas it seems not to
> >> happen in RStudio.
> >>
> >> Similar to OP, I sometimes have a problem with functions using the
> >> progress bar. Frequently, the console is cleared after x iterations
> >> when the progress bar is called in a function which is wrapped in a
> >> loop. In the example below, this happened for me every ~44th
> >> iteration. Interestingly, it seems that reduction of the sleep times
> >> in this function increases the number of iterations before clearing.
> >> In my real application, where the progress bar is used in a much
> >> slower function, the console is cleared every 2-3 iteration, which
> >> means that I cannot scroll back to check the output.
>
> testit <- function(x = sort(runif(20)), ...) {
> pb <- txtProgressBar(...)
> for(i in c(0, x, 1)) {Sys.sleep(0.2); setTxtProgressBar(pb, i)}
> Sys.sleep(1)
> close(pb)
> }
>
> it <- 0
> while (TRUE) {testit(style = 3); it <- it + 1; print(paste("done", it))}
>
> >> Is this only a problem for a few, or is it reproducible? Any hints to
> >> what the problem could be, or if it can be fixed? I have seen this in
> >> some versions of R, and could also reproduce in 3.3.2.
>
> "some versions of R" ... all on Windows ?
>
> >>
> >> Best wishes,
> >> Jon
> >>
> >> R version 3.3.2 (2016-10-31)
> >> Platform: x86_64-w64-mingw32/x64 (64-bit)
> >> Running under: Windows 8.1 x64 (build 9600)
> >>
> >> locale:
> >> [1] LC_COLLATE=English_United States.1252
> >> [2] LC_CTYPE=English_United States.1252
> >> [3] LC_MONETARY=English_United States.1252
> >> [4] LC_NUMERIC=C
> >> [5] LC_TIME=English_United States.1252
> >>
> >> attached base packages:
> >> [1] stats graphics grDevices utils datasets methods base
>
> [.....................]
>
> > Jon Olav Skøien
> > Joint Research Centre - European Commission
> > Institute for Space, Security & Migration
> > Disaster Risk Management Unit
>
> > Via E. Fermi 2749, TP 122, I-21027 Ispra (VA), ITALY
>
> > jon.sko...@jrc.ec.europa.eu
> > Tel: +39 0332 789205
>
> ______________________________________________
> R-devel@r-project.org mailing list
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