From bug-octave-request at bevo dot che dot wisc dot edu  Tue Apr 21 22:11:43 1998
Subject: permuting the interior columns of a matrix doesn't work
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Neil DeBoni <ncdeboni at undergrad dot math dot uwaterloo dot ca>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Tue, 21 Apr 1998 22:09:58 -0500 (CDT)

On 21-Apr-1998, Neil DeBoni <ncdeboni at undergrad dot math dot uwaterloo dot ca> wrote:

| Bug report for Octave 2.0.5 configured for i586-pc-linux-gnu
| 
| Description:
| -----------
| 
| Permuting the interior (i.e., non-border) columns of a matrix doesn't work;
| it makes no change at all to the matrix.  I first found this on a 4x4 identity
| matrix, then a 5x5 identity matrix, a 5x4 matrix, and a 4x4 Hilbert matrix.
| 
| Repeat-By:
| ---------
| 
| Below is a diary from a test using a 5x5 identity matrix.  Command line 7
| defines the matrix, lines 8 and 9 attempt (and fail) to permute "interior"
| columns, and line 10 shows a successful permutation involving at least one
| "border" column.
| 
| octave:7> foo = eye(5)
| foo =
| 
|   1  0  0  0  0
|   0  1  0  0  0
|   0  0  1  0  0
|   0  0  0  1  0
|   0  0  0  0  1
| 
| octave:8> foo(:,[1 3 2 4 5])
| ans =
| 
|   1  0  0  0  0
|   0  1  0  0  0
|   0  0  1  0  0
|   0  0  0  1  0
|   0  0  0  0  1

This bug has been fixed for a long time.  2.0.5 was released more than
a year ago.  You should definitely be using a newer version.  2.0.11
is the most recent release (and 2.0.12 will probably be out within a
few weeks).

Thanks,

jwe