From ripley@stats.ox.ac.uk  Sun Nov 18 15:59:57 2001
From: ripley@stats.ox.ac.uk (Prof Brian Ripley)
Date: Sun, 18 Nov 2001 15:59:57 +0000 (GMT)
Subject: [Rd] Re: Producing PNG on Debian Linux (was the false bug report, Re:
 [Rd] png output requires X connection (PR#1165))
In-Reply-To: <15351.50918.696817.868018@sonny.eddelbuettel.com>
Message-ID: <Pine.LNX.4.31.0111181550520.22024-100000@gannet.stats>

On Sun, 18 Nov 2001, Dirk Eddelbuettel wrote:

>
>   "Brian" == Brian D Ripley <Prof> writes:
>   Brian>  Already done in R-devel:
>
> Thanks!
>
>   Brian> NB: on our servers there is an X11 display available to cron jobs.
>
> Hm. I just added x11() to the script snipped of yours:
>
> edd@sonny:~> cat /tmp/R.sh
> #!/bin/sh
>
> echo | R -q --no-save <<EOF
> bitmap("test.png")
> plot(1:10)
> graphics.off()
> x11()
> EOF
>
> but starting this under at(1)
>
> edd@sonny:~> echo /tmp/R.sh | at now
> warning: commands will be executed using /bin/sh
> job 57 at 2001-11-18 08:31
>
> yields an error:
>
> From: Dirk Eddelbuettel <edd@debian.org>
> To: edd@eddelbuettel.com
> Subject: Output from your job       57
> Date: Sun, 18 Nov 2001 08:31:59 -0600
>
> > bitmap("test.png")
> > plot(1:10)
> > graphics.off()
> > x11()
> Error in X11(display, width, height, pointsize, gamma, colortype, maxcubesize) :
> 	unable to start device X11
> Execution halted
>
> How does Solaris do this, and how can we get Linux to do the same?

Don't know: suspect it is a permissions / Xauth thing.   To be precise,
I've only ever tested my Solaris server (ex my desktop machine).

I tried

auk% cat /tmp/R.sh
#!/bin/sh
echo | R -q --no-save <<EOF
png("/tmp/test.png")
plot(1:10)
graphics.off()
EOF

auk% echo /tmp/R.sh | at now

and it worked and wrote test.png.


Brian

-- 
Brian D. Ripley,                  ripley@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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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[Rd] Re: Producing PNG on Debian Linux (was the false bug report, Re: [Rd] png output requires X connection (PR#1165))
Prof Brian Ripley