[Octave-bug-tracker] [bug #48857] Incorrect indices for `union` with 'rows' flag

[Joakim Andén]

URL:
  <http://savannah.gnu.org/bugs/?48857>

                 Summary: Incorrect indices for `union` with 'rows' flag
                 Project: GNU Octave
            Submitted by: janden
            Submitted on: Mon 22 Aug 2016 02:23:35 PM GMT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0
        Operating System: GNU/Linux

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Details:

When calling `union` with the 'rows' flag, the correct set of rows is
returned, but their indices within the two input arrays are not correct.
Specifically, calling


[c, ia, ib] = union([1 2; 2 3; 4 5], [2 3; 3 4; 5 6], 'rows');


we get as output


c =

   1   2
   2   3
   3   4
   4   5
   5   6

ia =

   1
   4
   5
   3
   6

ib = [](0x1)


where 'ia' and 'ib' should be


ia =

   1
   3

ib =

   1
   2
   3


I've included a changeset that fixes this and includes some tests to make sure
we have the proper behavior.



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File Attachments:


-------------------------------------------------------
Date: Mon 22 Aug 2016 02:23:35 PM GMT  Name: union_fix.diff  Size: 1kB   By:
janden

<http://savannah.gnu.org/bugs/download.php?file_id=38314>

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