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Re: [CHANGESET]: First attempt at a single precision type.
From: |
John W. Eaton |
Subject: |
Re: [CHANGESET]: First attempt at a single precision type. |
Date: |
Mon, 28 Apr 2008 13:03:39 -0400 |
On 28-Apr-2008, David Bateman wrote:
| I thought about this further and it seems that matlab's behavior for
| mixed operators is
|
| double OP int -> int
| single OP int -> error
| double OP single -> single
The behavior is documented in the
Programming Fundamentals
Built-In Classes (Data Types)
Numeric Classes
Floating-Point Numbers
Arithmetic Operations on Floating-Point Numbers
section of the online documentation for Matlab.
To summarize:
Mixed operations for double are valid for the following types. The
result is double except where noted.
single (result is single)
double
intX or uintX (result is intX or uintX; double value must be a scalar)
char
logical
Mixed operations for single are valid for the following types. The
result is always single.
single
double
char
logical
I'm guessing that the fact that a simple numeric constant like 13 is
double in Matlab has something to do with the conversion rules, and
also the "double value must be scalar" restriction for mixed
double/integer operations. It would be painful to have to always
write
my_int8_var = my_int8_var + int8 (1);
jwe
- [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/27
- [CHANGESET]: First attempt at a single precision type., John W. Eaton, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., Jaroslav Hajek, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., Jaroslav Hajek, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., John W. Eaton, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type.,
John W. Eaton <=
- Re: [CHANGESET]: First attempt at a single precision type., Jaroslav Hajek, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., John W. Eaton, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., John W. Eaton, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., John W. Eaton, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., John W. Eaton, 2008/04/28
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/29
- Re: [CHANGESET]: First attempt at a single precision type., John W. Eaton, 2008/04/29
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/29
- Re: [CHANGESET]: First attempt at a single precision type., David Bateman, 2008/04/30