Re: Gnuplot error in Octave

[Thomas Treichl]

Niner schrieb:
> Hi Thomas,
>
> I install Gnuplot.app from the same package of Octave.dmg, which I 
> download from Octave-Forge. I place these two app in the /Applications 
> folder. Octave automatically finds gnuplot to plot, but I got error on 
> gnuplot. I also made link to Octave and Gnuplot such that I can open 
> them whenever I need in Terminal.app.
>
> The result of which gnuplot is
> /usr/bin/gnuplot
> where is the link pointing to.
>
> Thanks for your response.

No problem.

I think you have one of the problems that some users already reported. Something 
on their Mac influences Gnuplot.app and further tells Gnuplot.app to use some 
strange backend driver. In your case this is 'aquax' and I don't know who/what 
wants to set aquax for Gnuplot. I may copy a summary from an older email here to 
not must rewrite everything new, please check (and give feedback) if one of 
these settings match your criteria:

- The only thing that I can see and I don't know what it is for is the manual 
installation of AquaTerm - an installation of AquaTerm is not required if using 
the Gnuplot.app that comes with the octave-*.dmg. Gnuplot.app brings its own 
working AquaTerm framework that is installed in 
/Applications/Gnuplot.app/Contents/Resources/lib. Maybe the problem comes with 
that AquaTerm.app?!

- Can you see a .gnuplot file in your home directory? If yes what's in it?
    MyMac:~$ cat ~/.gnuplot

- If you do
    MyMac:~$ export GNUTERM=aqua
    MyMac:~$ /Applications/Gnuplot.app/Contents/Resources/bin/gnuplot
    gnuplot> plot sin(x)/x
  is the bug still there?

- gnuplot provides the x11 terminal type for use with X servers. This
terminal type is set automatically at startup if the DISPLAY environment
variable is set, if the TERM environment variable is set to xterm, or if
the -display command line option is used.

- If GNUTERM is defined, it is used as the name of the terminal type to be
used. This overrides any terminal type sensed by gnuplot on start-up, but
is itself overridden by the .gnuplot (or equivalent) start-up file (see
start-up (p. 34)) and, of course, by later explicit changes.

- On Unix, HOME is used as the name of a directory to search for a
.gnuplot file if none is found in the current directory.

- GNUPLOT_LIB may be used to define additional search directories for data
and command files. The variable may contain a single directory name, or a
list of directories separated by a platform-specific path separator, eg.
’:’ on Unix, or ’;’ on DOS/Windows/OS/2/Amiga platforms. The contents
of GNUPLOT LIB are appended to the loadpath variable, but not saved with
the save and save set commands.