[R] non-interactive R usage...

[Liaw, Andy]

I just try the following on Linux (Mandrake7.1) and it works:

file (tryplot.R:
jpeg("tryplot.jpg")
plot(rnorm(100))
dev.off()

>From the shell prompt:
R --no-save < tryplot.R > tryplot.Rout

This generated the JPEG file, and dump the R session text to tryplot.Rout.

If I understand correctly, jpeg() will *not* work with R BATCH, since it
depends on x11(), and x11() isn't available when run under batch mode.

Andy

> -----Original Message-----
> From: Chris Milkosky [mailto:c.milkosky at xpedite.com]
> Sent: Friday, October 05, 2001 9:24 AM
> To: r-mailing-list
> Subject: [R] non-interactive R usage...
> 
> 
> <Newbie alert> Hello all! </Newbie alert>   =)
> 
> Hi all,
> 
> First of all, I'm new to R and I'm REALLY REALLY impressed by 
> it.  It's an asset to the open source community.  I can't begin to say
> how glad I am to have stumbled across it in freshmeat.net...  
> Kudos to the developers - you've done a great job.
> 
> OK - my question may be answered by looking through 
> documentation (I did RTFM), but I haven't noticed anything 
> yet.  I think I must
> just be missing something though.
> 
> Does R give you the capability to run a script (read as 
> non-interactive) that would perform a statistical task, and 
> then send output
> to a file?  For example: read a set of data from a file, 
> generate a JPEG _file_ containing a plot of the data (with 
> some specific
> stat calcs plotted of course), and then exit?
> 
> I do capacity planning and would like to be able to have JPEG 
> plots of real time statistical data appear on web pages, so I'm
> thinking that a CGI can be executed that starts R up, 
> generates a plot, and writes it to a file.  We currently use 
> gnuplot, but with
> all of the statistical needs we have, it is turning out to be 
> less flexible than we had hoped.
> 
> Has this been done before?  Could it be?  If so, can we pass 
> command line parameters to our R scripts somehow?
> 
> Thanks,
> 
> Chris
> 
> 
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