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[Octave-bug-tracker] [bug #43925] isscalar behaves incorrectly for some
From: |
Julien Bect |
Subject: |
[Octave-bug-tracker] [bug #43925] isscalar behaves incorrectly for some user-defined classes |
Date: |
Sat, 03 Jan 2015 18:24:47 +0000 |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:34.0) Gecko/20100101 Firefox/34.0 |
URL:
<http://savannah.gnu.org/bugs/?43925>
Summary: isscalar behaves incorrectly for some user-defined
classes
Project: GNU Octave
Submitted by: jbect
Submitted on: sam. 03 janv. 2015 18:24:46 GMT
Category: Octave Function
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Matlab Compatibility
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 3.8.2
Operating System: GNU/Linux
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Details:
In Octave 3.8.2, isscalar(x) returns true if numel(x) is 1.
In Matlab, isscalar(x) returns true if size(x) is [1 1].
http://www.mathworks.com/help/matlab/ref/isscalar.html
These two conditions are not always equivalent.
For instance, in the case of a user-defined class that overloads size, it is
possible to have size (x) equal to [6 4] but numel (x) equal to 1. (And
overloading numel too is not always an option, since the result of numel
matters for subsref.)
isscalar has been rewritten in C++ on the default branch, but the behaviour is
still the same.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?43925>
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- [Octave-bug-tracker] [bug #43925] isscalar behaves incorrectly for some user-defined classes,
Julien Bect <=