gnuplot error

[William Christopher Carleton]

I don't know if you got Carlo's forward, but apparently you only need one or the other (Aquaterm or X11 - I think you get more functionality with X11). I was googling and found that using Macports you have to do something fancy with uninstalling and reinstalling Aquaterm if you want to use it. If you have both running though you can just set the display variable in gnuplot to use either one depending on what you need to do (interactive zooming or some such is available on X11). The page I grabbed this from is;

http://www.macresearch.org/gnuplot_x11_issues

I still had troubles, but found that the setenv DISPLAY:0 or the export DISPLAY=":0" was needed to get the plots to show up. I found the whole installation kind of annoying - including the octave install from .dmg, but on my linux at home it all installed very easily (except that I had to try installing the octave-headers twice b/c the first time didn't solve the problem I was having when trying to install the odepkg, but it's working now...)

C

-----Original Message-----
From: Robert Fong-tom <rfongtom at gmail.com>
To: William Christopher Carleton <williamcarlet at trentu.ca>
Date: Mon, 17 Nov 2008 10:32:22 -0500
Subject: Re: gnuplot error

Hi William,
Thanks for your advice.... you solved my problem! In all my trashing  
about to port Octave-Image package via MacPorts, It seems as if I  
trashed AquaTerm accidentally. After re-installing it everything  
seems to work.
Bob
On Nov 17, 2008, at 8:34 AM, William Christopher Carleton wrote:

> I'd check out this (long) forwarded octave help session;
>
> http://www-old.cae.wisc.edu/pipermail/help-octave/2006-June/ 
> 000627.html
>
> In the meantime, I recall having a similar issue last week with a  
> G5 Mac OS X and found that I could work around the X11 problem by  
> exporting the display something like;
>
> export DISPLAY=":0.0"
>
> in the terminal before attempting to plot anything. Then I simply  
> plot as usual and the X11 window comes up. You probably already  
> read this elsewhere, but you need to have Aquaterm and X11  
> installed before you can plot with gnuplot.
>
> Chris
> -----Original Message-----
> From: Robert Fong-tom <rfongtom at gmail.com>
> To: help at octave.org
> Date: Mon, 17 Nov 2008 01:21:08 -0500
> Subject: gnuplot error
>
> Hi,
> I just installed binary Octave 3.0.3 from Octave-Forge and now get
> the following error:
>
> gnuplot: unable to open display ':0'
> gnuplot: X11 aborted.
>
> I am running OS X 10.4 (Tiger) i386. I deleted Octave 3.0.2 and all
> packages (also downloaded from Octave-Forge) then reinstalled the new
> version and the packages. I did this because I had problems just
> installing the new version by replacing the 3.02 with 3.0.3. Also, I
> have been trying to install the image package without luck. I even
> tried porting it from MacPorts but gave up. I suspect that MacPort
> may have changed my environment because I noticed that after
> downloading MacPorts, Octave started under Terminal instead of X11.
> Is anyone familiar with this issue and know how to fix this problem?
> Bob
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