Is it possible the problem is another?
I cannot generate png images when R runs on a machine without
*installed* X11
Here is the error message when I submit a simple png() plot on a
computing node of my cluster.
Error in X11(paste("png::", filename, sep = ""), width, height,
pointsize, :
unable to start device PNG
Calls: png
In addition: Warning message:
In png("Test.png") : unable to open connection to X11 display ''
Execution halted
The solution for my problem is to generate pdf files (that are then
included in a LaTeX paper, so the "solution" does not help you).
Ciao!
mario
On 14-Mar-10 6:14, Sharpie wrote:
Jillian E Kozyra wrote:
Dear Colleagues,
We are attempting to create trees using R with our Ruby on Rails
application. However, we are running into a problem involving the
creation of the graphic. We would like them to be in either jpg or png
format so that users can save, but due to a lack of control over our
sever we are unable to start X11 server. Is there a way to create
these images without using X11 server?
Thanks,
JIllian
I had this exact same problem last summer when attempting to set up an
automated process involving image generation on a remote server. Since I
didn't have admin rights to the server, I ended up switching to the Cairo
package for image generation as it uses the Cairo library rather than X11 as
the back end.
The other solution involved setting some sort of obscure, arcane X11
permission that I can't recall right now. All I can recall is that finding
it was a frustrating half-day of Google searching and digging through man
pages.
I would suggest Cairo.
Hope this helps!
-Charlie
-----
Charlie Sharpsteen
Undergraduate-- Environmental Resources Engineering
Humboldt State University
--
Ing. Mario Valle
Data Analysis and Visualization Group |
http://www.cscs.ch/~mvalle
Swiss National Supercomputing Centre (CSCS) | Tel: +41 (91) 610.82.60
v. Cantonale Galleria 2, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82
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