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

<ul>
  <li>
    The function may exist
    in <a href="http://octave.sourceforge.net">Octave-Forge</a>, but
    has not yet been adopted as a part of the core Octave
    distribution.  You can try to look for your function in
    the <a href="http://octave.sourceforge.net/functions_by_alpha.php">alphabetical
    list of functions</a> at the Octave-Forge web site to see if it
    is available in some package.
  </li>
  <li>
    The function may be new to Matlab.  It is possible that the Octave
    community simply does not know it exists. Should this be the case,
    feel free to open a feature request in the
    <a href="http://bugs.octave.org">Octave bug tracker</a>.
  </li>
</ul>

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 <a href="get-involved.html">resources for developers</a>.