sometimes the fltk makes problems and crashes octave.
check the following within octave:
octave_config_info ().GRAPHICS_LIBS
this usually shows the fltk libs. if plot doesn’t work check in octave:
available_graphics_toolkits (shows fltk and gnuplot)
loaded_graphics_toolkits (shows {} or fltk or gnuplot)
try setting gnuplot as default
graphics_toolkit ("gnuplot")
plot (1) --> this should work. if not --> also update your gnuplot (see below)
to set gnuplot as graphics_toolkit permanently do in terminal
nano ~/.octaverc
and add
graphics_toolkit ("gnuplot")
please check your gnuplot version and update it in terminal:
gnuplot -v
if errors occur please do
fink install gnuplot