Install Octave with gui and gnuplot on macOS Mojave

install_octave_with_gui_and_gnuplot_on_macos_mojave.txt

# Install homebrew, if is not already installed:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

# Update and upgrade homebrew, if needed:
brew update && brew upgrade

# Install XCode (it is a long download, it is an Octave dependency)
#  Go to Apple Store and install.

# Install Aquaterm
#   Download and install it from: https://sourceforge.net/projects/aquaterm/

# Install gnuplot with some extra parameters
brew install gnuplot --with-aquaterm --with-qt

# Finally install octave
brew install octave --with-qt

# Add the following some configurations in your ~/.octaverc file:
cat <<EOT >> ~/.octaverc
setenv('GNUTERM','qt')
graphics_toolkit("gnuplot")
EOT

# Finanlly we are done! Ufa ;)

It could be related to this post that the Homebrew devs wrote. I've been trying to use "--with-qt"
but I believe that doesn't work either for the same reasons.
Here's a link to the post:Homebrew/homebrew-core#31510