proposed patch for ismember.m

[John W. Eaton]

On  6-Nov-2007, Ben Abbott wrote:

| I started with Søren's recent work on ismember.m, and believe we now  
| have a Matlab compatible implementation of ismember.m
| 
| The texinfo has been updated and several new tests have been added.
| 
| I've attached the patch (which I hope is constructed properly) and a  
| ChangeLog.
| 
| In the event, the patch doesn't take, please give me explicit  
| instructions for how it should be created. I created the patch using
| 
|       cvs diff -u > ismember.patch
| 
| from the root directory of my CVS copy of octave.

I didn't look closely at the patch, but in order to simplify things, I
think I would prefer to have a version of this function that uses the
form I outlined here:

  https://www.cae.wisc.edu/pipermail/bug-octave/2007-November/003789.html

It would simplify things and also once we have objects, we can move
the cell_ismember function to @cell/ismember.m and let Octave do the
dispatching.

jwe