Re: gnuplot_x11 driver with octave.app/gnuplot.app on Mac

[Thomas Treichl]

Henry F. Mollet schrieb:
> I want to use gnuplot_x11 instead of AquaTerm for plots when using
> octave.app/gnuplot.app in xterm window.
> "GNUTERM=X11" does not work (see below)
>
> It works with octave-2.1.71/gnuplot-4.0 in xterm windwow.
> Henry
>
> henry-f-mollets-emac:~ hfm$ GNUTERM=X11
> henry-f-mollets-emac:~ hfm$
> /Applications/Octave.app/Contents/Resources/bin/octave
>
> GNU Octave, version 2.9.13
> Copyright (C) 2007 John W. Eaton and others.
>
> octave-2.9.13:1> fplot('cos',[0,2*pi])
> Expected X11 driver: /tmp/gnuplot-ppc/libexec/gnuplot/4.2/gnuplot_x11
> See 'help x11' for more details
> /Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: line 57:   694
> Broken pipe             "${ROOT}/bin/gnuplot-4.2.0" "$@"
>
> [~] -bash-2.05b 502$ locate gnuplot_x11
> /Applications/GnuPlot.app/Contents/Resources/libexec/gnuplot/4.2/gnuplot_x11
> /usr/local/libexec/gnuplot/4.0/gnuplot_x11

Right Henry, some is my fault.

I added the following code to the file 
<Gnuplot.app>/Contents/Resources/bin/gnuplot to make sure that the X11 runtime 
environment is opened and all necessary variables are set (if not already set). 
Add this code in line 56 after "export GNUPLOT_PS_DIR... fi"

  if [ "${GNUTERM}" == "x11" ]; then
    # Edit /etc/X11/xinit/xinitrc if you don't like it that an xterm is
    # opened if X11 is started.
    open "/Applications/Utilities/X11.app"
    if [ -z ${DISPLAY} ]; then export DISPLAY=:0.0; fi
    if [ -z ${GNUPLOT_DRIVER_DIR} ]; then
      export GNUPLOT_DRIVER_DIR="${ROOT}/libexec/gnuplot/4.2"
    fi
  fi

then try to run <Gnuplot.app>/Contents/Resources/bin/gnuplot and type

  bash$ export GNUTERM=x11 # note the lower case letter of x11
  bash$ <Gnuplot.app>/Contents/Resources/bin/gnuplot
  gnuplot> plot sin(x)/x

I can see another problem in the current CVS of octave that the version number 
of Gnuplot.app is not set correctly and because of this we get another error. I 
need to have a look for that and will send back a patch to the Octave bug-list 
(meanwhile can you please try if these changes solve the problem on your 
machine?). You can also work around this problem if you set

  __version__ = "4";

in line 39 of the file 
<Octave.app>/Contents/Resources/share/octave/2.9.13/m/plot/__gnuplot_version__.m

also drawnow.m overwrites the term variable to "aqua" - a first workaround would 
be that you manually set "x11" in line 124 of 
<Octave.app>/Contents/Resources/share/octave/2.9.13/m/plot/drawnow.m

  term = "x11";

Don't know if I have the time today to work on this problem but meanwhile you 
should be able to work with this and X11. I prepare a patch and then send this 
to the list.

  Thomas