How-to: Install the Newest Octave 3.6.3 on Ubuntu (12.04)

Step-by-step:

1. Add the following repository
sudo add-apt-repository ppa:mtmiller/octave
2. Install Update
sudo apt-get update
3. Install Octave
sudo apt-get install octave
4. Run Octave
Octave -q 

KISS ! (Keep It Simple St*pid)