How to uninstall octave3.0 from Ubuntu
To uninstall just octave3.0 package itself from Ubuntu execute on terminal:
sudo apt-get remove octave3.0
Uninstall octave3.0 and it's dependent packages
To uninstall the octave3.0 package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove octave3.0
If you also want to delete configuration and/or data files of octave3.0 from Ubuntu then this will work:
sudo apt-get purge octave3.0
To delete configuration and/or data files of octave3.0 and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge octave3.0
octave3.0 package information
GNU Octave language for numerical computations (3.0 branch)
Octave is a (mostly Matlab (R) compatible) high-level language, primarily intended for numerical computations. It provides a convenient command-line interface for solving linear and nonlinear problems numerically. Octave uses some of the best and most respected numerical libraries as balgen, dassl, eispack, fftpack, lapack, linpack, minpack, odepack, ranlib, slatec-fn and villad. Octave can be dynamically extended with user-supplied C++ files.
More information about apt-get remove
Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.
apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.