This is the histc function I was working on to go with Octave but never really
finished. It isn't very efficient and it didn't pass all of the test cases I
could think of (weird empty inputs and similar corner cases). You should
probably use the histc.m that now ships with Octave (although it doesn't match
Matlab on all corner cases either).

The comments that I wrote while working out how histc behaves might be useful.
      Name                    Last modified      Size  Description
cellmap.m 2009-11-10 14:16 731 dimfun.m 2009-11-10 14:15 468 dimmap.m 2009-11-10 14:16 630 histc.m 2009-11-10 00:33 4.4K