[Octave-bug-tracker] [bug #29863] ismember outputs do not match input array dimension

[Qianqian Fang]

URL:
  <http://savannah.gnu.org/bugs/?29863>

                 Summary: ismember outputs do not match input array dimension
                 Project: GNU Octave
            Submitted by: fangq
            Submitted on: Wed 12 May 2010 04:17:45 AM GMT
                Category: Libraries
                Severity: 3 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Qianqian Fang
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

ismember behaves differently from matlab. Based on the help description, the
output logic array has the same dimension as the input, however, in octave 3.2
as well as the hg version, the output is a vertical vector no matter what the
input dimension is.

Here is an example:

f=[1 2 3;3 4 5; 1 4 9];
[ii,jj]=ismember(f,f(1,:));

the outputs ii and jj are both 9x1 vectors. while, in matlab, both are 3x3
arrays (the same as f).

Possible fix:

maybe a line such as the following

  a_idx = reshape(a_idx, size(a));

should be added around #98 and #123 in ismember.m




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