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Re: varargout{:} = func() ?
From: |
Jaroslav Hajek |
Subject: |
Re: varargout{:} = func() ? |
Date: |
Wed, 24 Feb 2010 06:03:37 +0100 |
On Wed, Feb 24, 2010 at 3:03 AM, Ben Abbott <address@hidden> wrote:
> On Feb 23, 2010, at 8:11 PM, John W. Eaton wrote:
>
>> On 23-Feb-2010, Ben Abbott wrote:
>>
>> | On Feb 23, 2010, at 7:43 PM, WS wrote:
>> |
>> | > Has this notation been implemented in octave yet?
>> | >
>> | > Tx
>> |
>> | hmmm ... if you mean something like what is below, then yes.
>> |
>> | function varargout = foobar ( )
>> | for n = 1:numel(nargout)
>> | varargout{n} = n;
>> | end
>> | end
>> |
>> | In this instance "varargout" has a special meaning.
>> |
>> | If you mean, something like what is below, then that doesn't work with
>> 3.2.x, but does with Matlab.
>> |
>> | v{:} = {rand(1,2), rand(1,3)}
>> | error: invalid dimension inquiry of a non-existent value
>> |
>> | or
>> |
>> | v{:} = rand(1,2)
>> | error: invalid dimension inquiry of a non-existent value
>> |
>> | Jarsolav, is this something that should be added to Octave?
>>
>> You need to write
>>
>> v = cell (expected_nargout, 1);
>>
>> [v{:}] = func (...);
>>
>> Does
>>
>> v = cell (expected_nargout, 1);
>> v{:} = func (...);
>>
>> work in Matlab? If so, I think that's a relatively new addition and
>> in my opinion doesn't really fit with the rest of the language.
>
>>> v = cell (3, 1)
> v =
> []
> []
> []
>
>>> v{:} = rand(1,2)
> v = [1x2 double]
>
> My impression is that this isn't very new, but as I've always found some of
> how Matlab handles cells to be counter intuitive (if not misleading), so I'm
> not in the habit of using this notation.
>
> Ben
>
>
I'd even say this is a bug in Matlab. The LHS expression is obviously
a cs-list with 3 elements, and it is outside multiple assignment, so
it should give an error, like in Octave. This should only work if v is
1-by-1 (it does in Octave). What version of Matlab did you try?
--
RNDr. Jaroslav Hajek, PhD
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz
Re: varargout{:} = func() ?, Jaroslav Hajek, 2010/02/23
- Re: varargout{:} = func() ?, forkandwait, 2010/02/24
- Re: varargout{:} = func() ?, John W. Eaton, 2010/02/24
- Re: varargout{:} = func() ?, forkandwait, 2010/02/24
- Re: varargout{:} = func() ?, John W. Eaton, 2010/02/24
- Re: varargout{:} = func() ?, forkandwait, 2010/02/24
Re: varargout{:} = func() ?, Jaroslav Hajek, 2010/02/24