So, you tried to use a missing function...?

GNU Octave strives to be among the very best numerical tools available. While compatibility with Matlab is one of many strong features of Octave, we have not achieved 100% compatibility. If you are reading this page, it is most likely because you attempted to use a function that is part of core Matlab, but has yet to be implemented in Octave.

There can be several reasons for the given function not to exist in Octave:

The Octave community consists of volunteers working in their spare time. As a result, development might sometimes not be fast enough for your needs. If you have a feature request for Octave, the best way to ensure that your suggested improvement gets incorporated is either to implement the feature yourself or to pay somebody to do it for you. If you are interested in funding work on Octave, please check out the resources for developers.