how to pause between plots running scripts?
Thank you. I am using R 2.0.0 under Windows 2000. I've tried 1. par(ask=T) 2. readline(prompt = "Pause. Press <Enter> to continue...") 1. script: x <- 0:20 y <- 5:25 plot(y) plot(x) plot(y~x) output:
par()$ask
[1] TRUE
x <- 0:20 y <- 5:25 plot(y)
Hit <Return> to see next plot: plot(x) ####R does not pause after plot(y) #### it seems R eats the second plot(x)
plot(y~x)
Hit <Return> to see next plot: ####R does pause here 2. script: x <- 0:20 y <- 5:25 plot(y) readline(prompt = "Pause. Press <Enter> to continue...") plot(x) pause() plot(y~x) output: ####R does not pause at all
par()$ask
[1] TRUE
plot(y)
Hit <Return> to see next plot: readline(promp #seems plot() eats some characters
= "Pause. Press <Enter> to continue...")
Error: syntax error
plot(x)
Hit <Return> to see next plot: pause()
plot(y~x)
Hit <Return> to see next plot: I don't know if I have made some stupid mistakes or messed up some of configurations. ************************************************************* On Sat, 27 Nov 2004 13:07:58 -0600, Marc Schwartz
<mschwartz at medanalytics.com> wrote:
On Sat, 2004-11-27 at 11:42 -0500, Terry Mu wrote:
I used pause() from library(DAAG) to pasue between plots. This works when I source a script, but seems don't work when I run (ctrl + R) the script in R. Did I do something wrong? Thanks.
The standard way to pause between plots is to set 'par(ask = TRUE)' before your first plot, which will then prompt you to continue after each new plot. See ?par for more information. I am presuming that you are using Windows, which you do not indicate, with CTRL-R being the command to paste and run code from the R Windows GUI editor.
From a scan of the code for DAAG's pause(), it appears to use the
readline() function to prompt for user input as the basis for the pausing. A scan of the source code in .../gnuwin32/editor.c indicates that the copy and paste operation to the Rgui console from the editor takes place via the clipboard in function editorrunselection, if my read is correct. I would defer to Duncan Murdoch and Prof. Ripley here, but I suspect that there may be some interaction between readline() and the copy/paste/run mechanism that precludes pause() from running in this situation. A quick test you might want to run would be to replace pause() with: readline(prompt = "Pause. Press <Enter> to continue...") in your code to see if this behavior continues, independent of the DAAG package. You should also notify the DAAG package authors/maintainer of the issue. HTH, Marc Schwartz