From help-octave-request at bevo dot che dot wisc dot edu Tue Dec 11 22:40:15 2001
Subject: logical and ????
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: flatmax at cse dot unsw dot edu dot au (Matthew Flax)
Cc: help-octave at bevo dot che dot wisc dot edu
Date: Tue, 11 Dec 2001 22:40:05 -0600

On 12-Dec-2001, Matthew Flax <flatmax at cse dot unsw dot edu dot au> wrote:

| When I  try the following I get a confusing answer :
| 
| octave:47> 0x4 & 0x8
| ans = 1
| 
| surely that should be ans=0 ?

No.  The & and | operators work element-by-element for matrices.  Your
0x4 and 0x8 numbers are just scalars, so the result is 1, which tells
you that both elements in the comparison are nonzero.  If you want
bit-wise operations, you need some functions to do it.  The matcompat
package may have some, but they aren't distributed as a part of Octave
(yet).

jwe



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