[Octave-bug-tracker] [bug #40808] setxor function produces incorrect result with 'row' argument

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?40808>

                 Summary: setxor function produces incorrect result with 'row'
argument
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 04 Dec 2013 05:16:02 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: David Szepesvari
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.6.4
        Operating System: GNU/Linux

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Details:


E1 = [1 2; 4 5; 1 3]
E2 = [1 1; 1 2; 4 5]
setxor(E1, E2, 'rows')


produces:

   1   1
   1   2
   1   2
   1   3
   4   5
   4   5


when what I expect (and is outputted by Matlab):

     1     1
     1     3

or

     1     3
     1     1


I attached the fixed setxor.m file. It is only line 64 (in the attached
file),

      idx = find (all (c(1:n-1) == c(2:n), 2));

that is changed to

      idx = find (all (c(1:n-1, :) == c(2:n, :), 2));



Unrelated:
Why is the number of rows of a and b counted, if these are not used. Also, the
rows of c are saved into n, end then 'n-1' is used for indexing; is there a
particular reason for not using 'end-1'?



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File Attachments:


-------------------------------------------------------
Date: Wed 04 Dec 2013 05:16:02 PM UTC  Name: setxor.m  Size: 3kB   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=29787>

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