calling R from a shell script and have it display graphics

I don't know about the "simpler" part, but you could use the tcltk 
package to put up a window that prompts the user to continue.

-Don


At 11:57 AM +0100 2/12/04, Christophe Pallier wrote:

Hello,

I am running R under Linux/x11.

I would like to call R from a shell script and have it display a 
series of graphics.
The graphics should remain visible until the user clicks or presses a key.

I first tried R BATCH, but it does not load the x11 module, making 
it impossible to open x11 or png devices.

Then, I tried to call R with a 'here' script:

R --vanilla --quiet --args text.txt <<'EOF'
file=commandArgs()[5]
cat('processing ',file,'\n')
...
x11()
plot(f2,log='xy',type='b',las=1,cex=.5,xlab='rang',ylab='freq')
Sys.sleep(10)
q()
EOF

The problem with this approach is that the script cannot interact 
with the user.
par(ask=T) will fail because it reads input from the script rather 
than from the keyboard.

While I am writing this, a solution comes to my mind: I could save 
all the graphics in png format (using R <script.R), and when it is 
finished, call ImageMagick's display to show all the png (or use any 
other diaporama system). However, I find it a dirty hack.

Is there a simpler and cleaner way to achieve this?

Christophe Pallier
www.pallier.org

-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA