From maintainers-request at octave dot org Thu Nov 11 23:26:14 2004
Subject: RE: integer concatenation (was: Octave 2.1.61 available for ftp)
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: "Hall, Benjamin" <benjamin dot hall at pw dot utc dot com>
Cc: "'John W. Eaton'" <jwe at bevo dot che dot wisc dot edu>,         "'octave maintainers mailing list'" <maintainers@octave.org>
Date: Fri, 12 Nov 2004 00:25:51 -0500

On 10-Nov-2004, Hall, Benjamin <benjamin dot hall at pw dot utc dot com> wrote:

| Here's what R14 does
| 
| >> a = [int8(1), int16(2)];
| Warning: Concatenation with dominant (left-most) integer class may overflow
| other operands on conversion to return class.
| >> b = [int16(1), int8(2)];
| Warning: Concatenation with dominant (left-most) integer class may overflow
| other operands on conversion to return class.
| >> c = [int8(1), 2];
| >> d = [1, int8(2)];
| >> whos
|   Name      Size                    Bytes  Class
| 
|   a         1x2                         2  int8 array
|   ans       1x2                         2  int8 array
|   b         1x2                         4  int16 array
|   c         1x2                         2  int8 array
|   d         1x2                         2  int8 array
| 
| Grand total is 10 elements using 12 bytes

OK.  Should we also issue a warning?

| and, of course, it does the intN / complex concatenations
| 
| >> e = [1 int8(3+2i)];
| >> f = [3+2i, int8(4)];
| >> whos e f
|   Name      Size                    Bytes  Class
| 
|   e         1x2                         4  int8 array (complex)
|   f         1x2                         4  int8 array (complex)
| 
| Grand total is 4 elements using 8 bytes

I don't expect that Octave will have integer complex values any time
soon.

Thanks,

jwe