From bug-octave-request at bevo dot che dot wisc dot edu  Thu Oct 12 04:49:19 2000
Subject: Re: Odd results from &, |, % functions
From: Kai Habel <kahacjde at calvados dot zrz dot TU-Berlin dot DE>
To: Carsten Rasmussen <carsten dot rasmussen at silicide dot dk>
CC: bug-octave at bevo dot che dot wisc dot edu
Date: Thu, 12 Oct 2000 11:49:58 +0200

Carsten Rasmussen schrieb:
> 
> Hello octave-bug
> I have tried the as follows with octave.
> 
> ---------
> /home/carsten> octave
> GNU Octave, version 2.0.16 (alpha-suse-linux-gnu).
> Copyright (C) 1996, 1997, 1998, 1999, 2000 John W. Eaton.
> This is free software with ABSOLUTELY NO WARRANTY.
> For details, type `warranty'.
> 
> octave:1> 7 & 4
> ans = 1
> octave:2> 5 | 3
> ans = 1
> octave:3> 7 % 4
> ans = 7
> octave:4
> -----------
> 
> I expected that & and | operator should work as an bitwise-AND and bitwise-OR
> (as in C and MATLAB)
> I would expect.
> octave:1> 7 & 4
> ans = 4
> octave:2> 5 | 3
> ans = 7
> 
> And the remain remain operator % is interpret as a comment(#)?
> I would expect:
> octave:3> 7 % 4
> ans = 3
> 

Hello Carsten,

the examples you described, work the same way in matlab. To get bitwise
logical operation you have to use bitand, bitor, ... in matlab. I have
implemented bit operations for octave, but you have to compile these
yourself. You can get them at http://user.berlin.de/~kai.habel - take
the tarball.

To get the remainder after division use:
rem(7,4)



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