From help-octave-request at bevo dot che dot wisc dot edu  Mon Nov 24 13:14:48 1997
Subject: xcorr
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Thomas Hoffmann <hoffmann at ehmgs2 dot et dot tu-dresden dot de>
cc: help-octave at bevo dot che dot wisc dot edu
Date: Mon, 24 Nov 1997 13:15:49 -0600

On 24-Nov-1997, Thomas Hoffmann <hoffmann at ehmgs2 dot et dot tu-dresden dot de> wrote:

| Maybe this belongs to the bugs list or not to an Octave ("kernel")
| list at all:
| 
| The contributed script xcorr.m (in a subdir "imagep") can only
| process vectors, when given to it two non-string parameters. For
| that it checks
| 
| if (is_matrix(x) || is_matrix(y))
|       error("Only vectors are supported, use xcorr2 for matrix correlation");
|     end
|     
| Shouldn't that read "!is_vector(x)" instead of "is_matrix(x)",
| simply because a vector is a (special) matrix, too?

Yes, it probably should use some other test.  You should probably
contact the author of the file in question.  I don't think xcorr is
distributed with Octave.

jwe