[R] R graphics with Linux (libpng)

From: Rebecca Tagett <tagett_at_ipsogen.com>
Date: Thu 11 Jan 2007 - 18:09:25 GMT


Hello,

I'm trying to adapt some R code that works on Windows so that it will work on a Linux machine.

The command :

png("myFile.png", width=600, height=600)

fails claiming that it is impossible to establish a connection with X11. (Error messages are in French, so I'm not pasting them here!)  

I have libpng installed:

>rpm -qa libpng*

libpng-1.0.12-2

libpng-devel-1.0.12-2  

So I don't understand why R thinks I'm trying to connect to X11. I haven't been able to find many examples of R graphics code specifically for Linux, but I have the impression that if libpng is installed, the graphics commands are identical. The libpng manual is not useful, because it does not mention use of libpng commands in an R environment.  

I'm using R 2.4.1, which I recently installed. Do I have to install a more recent libpng ? If so, do I have to reconfigure and remake R ?  

I've also read that no graphics devices are available under R CMD BATCH. Does that really mean that I can't create graphics from some R code that I launch in noninteractive mode?  

Thanks in advance !  

Rebecca Tagett

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