[Octave-bug-tracker] [bug #44453] Document that intersect (and other set functions) return only unique elements

[Rik]

Update of bug #44453 (project octave):

                Category:         Octave Function => Documentation          
              Item Group:        Incorrect Result => Incorrect Documentation
                  Status:                    None => Confirmed              
                 Release:                   3.8.2 => 4.0.0-rc1              
        Operating System:       Microsoft Windows => Any                    
                 Summary: Intersect function returning neither complete vector
of common elements nor indices => Document that intersect (and other set
functions) return only unique elements

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Follow-up Comment #1:

This is the correct behavior and matches the Matlab function
(http://www.mathworks.com/help/matlab/ref/intersect.html).  The documentation
needs to be updated to say that "unique" or "non-repetitive" elements are
returned.

This is a pretty easy change to the m-files in the scripts/set directory.  If
you can prepare a changeset or diff I can review and push it to the Mercurial
repository

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