Structure of Octave packages in openSUSE was changed. Octave 4.0 brings stabilization of official graphical user interface. Upstream uses it by default, so
octave package provides GUI. For users, who want to install only traditional command line interface, all non-gui stuff was moved to
And finally we have most part of Octave Forge packages in main openSUSE repository for Tumbleweed and Leap 42.1. Science repository traditionally contains latest versions of Octave Forge packages for all supported openSUSE releases.