WARNING: Plotting with an 'unknown' terminal. No output will be generated. Please select a terminal with 'set terminal'

Question

i am following the great machine learning course given by Andrew Wu from Stanford. When I executed plot function in ex5 file, the octave cli command line reports the following w

Answer 1

for me, what fixed it was:

brew install Caskroom/cask/aquaterm
brew upgrade gnuplot --with-aquaterm --with-qt4