R help - Jul 2007 - Prompt comes too late

Hi R fans

I am trying to make a program to ask the user to choose data file:

print("Choose data file please !")

matr=read.table(file.choose(),dec=".",header=TRUE)

The problem is that the prompt 
Choose data file please !   
comes after I have chosen the file.

What  am doing wrong?

Thanks in advance
Ralf Finne

Using print() for a 'prompt' is rather unusual: people normally use 
message() or cat().

You haven't told us your OS, but if this is Windows, see rw-FAQ Q7.1.


On Sun, 29 Jul 2007, Ralf Finne wrote:
> Hi R fans
>
> I am trying to make a program to ask the user to choose data file:
>
> print("Choose data file please !")
>
> matr=read.table(file.choose(),dec=".",header=TRUE)
>
> The problem is that the prompt
> Choose data file please !
> comes after I have chosen the file.
>
> What  am doing wrong?
>
> Thanks in advance
> Ralf Finne
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>
-- 
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)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

You can use 
choose.files(caption="Choose data file
please!",multi=FALSE,filters=Filters["All"])

This will show the prompt in the file selection dialog and also allows you
to restrict the list of possible choises with a filter.


Ralf Finne wrote:
> 
> I am trying to make a program to ask the user to choose data file:
> 
> print("Choose data file please !")
> 
> matr=read.table(file.choose(),dec=".",header=TRUE)
> 
> The problem is that the prompt 
> Choose data file please !   
> comes after I have chosen the file.
> 
-- 
View this message in context:
http://www.nabble.com/Prompt-comes-too-late-tf4178913.html#a11919327
Sent from the R help mailing list archive at Nabble.com.