gnuplot> set terminal aqua enhanced title "Figure 1" font "*,6" dashlength 1
line 0: unknown or ambiguous terminal type; type just 'set terminal' for a list
After some Google search and experimentation, here's the solution I found to work. You need to edit "octaverc" file in the following path:
sudo vi /usr/local/octave/3.8.0/share/octave/site/m/startup/octaverc
(FYI, I have the version 3.8.0 above, so yours may be installed in a different folder.)
In that file, add this line at the end:
Save the file, and that GNUTERM environment variable will be set every time you run octave. This works for OS X Maverick.
Others have also reported the following to work (instead):
I suspect that works for folks who installed XQuartz, which is an X11 implementation for OS X that is no longer included in more recent versions of OS X.