Re: senseless warning in octave-3.6.2

[Ben Abbott]

On Jul 1, 2012, at 7:53 PM, Sergei Steshenko wrote:

> 
> 
> 
> 
> ----- Original Message -----
>> From: Jordi Gutiérrez Hermoso <address@hidden>
>> To: Sergei Steshenko <address@hidden>
>> Cc: c. <address@hidden>; Octave users list <address@hidden>
>> Sent: Monday, July 2, 2012 12:01 AM
>> Subject: Re: senseless warning in octave-3.6.2
>> 
>> On 1 July 2012 16:42, Sergei Steshenko <address@hidden> wrote:
>>> Why on earth two _vectors_ are promoted to a matrix ?
>> 
>> http://www.gnu.org/software/octave/doc/interpreter/Broadcasting.html
>> 
>> HTH,
>> - Jordi G. H.
>> 
> 
> No, the document does _not_ help. Because it does _not_ explain _why_ in a 
> context of _only_ vector operands a matrix is produced (and, by the way, as I 
> wrote, it's not "broadcasting", in programming WRT types "promotion" and 
> "demotion" is used).
> 
> As wrote much much earlier, essentially column vector vs row vector is a 
> nuisance - one type of vector would suffice.
> 
> IIUC, column vector is kind of default in Octave, that's why I expect
> 
> vec = row_vec OP col_vec
> 
> to be implemented as
> 
> vec = row_vec(:) .OP col_vec(:)
> .
> 
> Regards,
>   Sergei.

Strictly speaking there are no vectors or scalars.  Only matrices.

[1] -> is a 1x1 matrix
[1;1] -> is a 2x1 matrix
[1,2] -> is a 1x2 matrix

This is a result of legacy Matlab code.

Ben