Octave for other Unix systems
For other Unix systems you may have to build Octave from source.
The easiest way to obtain GNU Octave is to install the precompiled package as root user:
pkg_add -r octave
cd /usr/ports/math/octave make install clean
Some Octave Forge packages can be installed in the same way:
pkg_add -r octave-forge
or via Ports.
Octave can be installed on OpenBSD by installing the precompiled package or by building from source.
The Octave package for OpenBSD is currently at version 3.0.5. Install it as root:
Building from source on OpenBSD takes a bit of work at the moment, see Compiling on OpenBSD for more details.