You may file a feature request for it on the bug tracker.
Please be aware that it might take several months
until for new features become part of Octave.
Consider commercial support
if you don’t want to wait that long.
Make your bug report count
Report all the facts:
Include all information that make it possible to fix the bug.
If you are not sure whether to state a fact or leave it out, state it.
This information includes your operating system, Octave version,
exact error message or exact output.
Give a short, specific, complete example:
Avoid: pseudocode, uninitialized variables,
calls to unattached scripts or functions.
Justify your expectations briefly:
Although it might seem obvious to you,
someone examining the problem might not know what result you consider
Sending Patches for Octave
If you have a suggested fix for a bug,
please attach it to your report in the tracker.
Your patch is more likely to be reviewed if you follow the guidelines from the
Octave Wiki about the creation of changesets.