[R] cat not evaluated before file.choose

[Prof Brian Ripley]

I believe this is specific to the MacOS (and Windows) GUI, which you did 
not mention you were using.

See ?flush.console for the solution.  Your subject line is misleading: it 
is the console that is delaying showing the result.

On Sat, 25 Nov 2006, Kevin Middleton wrote:

> As part of a larger function I have code similar to the reduced
> example below. The user is instructed to choose a file, which gets
> read using read.csv. In this example, I just have the name of the
> file print out.
>
> When I call this function with choosefile(), the file dialog box
> appears before the first cat line is printed. After I choose a file,
> both cat lines are printed.
>
> choosefile <- function (){
> 	cat("Choose the data file.\n")
> 	filename <- file.choose(new = FALSE)
> 	cat("You chose: ", filename, sep = "")
> 	}
>
> Is there a way to force the first cat line to print before the call
> to file.choose? I'm using R 2.4.0 Patched (2006-11-24 r39989) on OS
> X. Session info below.
>
> Any suggestions would be greatly appreciated.
>
> Kevin Middleton
>
> -------
>
> > sessionInfo()
> R version 2.4.0 Patched (2006-11-24 r39989)
> powerpc-apple-darwin8.8.0
>
> locale:
> en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
>
> attached base packages:
> [1] "stats"     "graphics"  "grDevices" "utils"     "datasets"
> "methods"   "base"

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
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)
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