Plot from Octave 3.8.0-1.dmg installer CLI

octave terminal

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Octave was configured for "x86_64-apple-darwin13.0.0".

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octave:1> plot(rand(3))

gnuplot> set terminal aqua enhanced title "Figure 1" size 560 420  font "*,6" dashlength 1
                      ^
         line 0: unknown or ambiguous terminal type; type just 'set terminal' for a list

octave:2> setenv GNUTERM qt
octave:3> graphics_toolkit gnuplot
octave:4> close all
octave:5> plot(rand(3))
Unknown or ambiguous terminal name 'qt'

gnuplot> set terminal aqua enhanced title "Figure 1" size 560 420  font "*,6" dashlength 1
                      ^
         line 0: unknown or ambiguous terminal type; type just 'set terminal' for a list

octave:6> setenv GNUTERM x11
octave:7> graphics_toolkit gnuplot
octave:8> close all
octave:9> plot(rand(3))
Unknown or ambiguous terminal name 'x11'

gnuplot> set terminal aqua enhanced title "Figure 1" size 560 420  font "*,6" dashlength 1
                      ^
         line 0: unknown or ambiguous terminal type; type just 'set terminal' for a list