Re: some multi-dimensional matrix problem

[David Bateman]

According to Bart Vandewoestyne <address@hidden> (on 05/24/04):
> 
> Thanks for the hint, but I would like to have the transposed of what you
> propose.  I know I can transpose it after the reshape, but my guess was
> that this takes some time, and since time is important in my
> calculations, i was wondering if there isn't a faster way to get my
> result.  the 'squeeze' command also gives the same result as yours...
> 
> Isn't there a way to tell reshape to start filling row-wise instead of
> column-wise?  Or another way to get what i want?
> 
> Regards,
> Bart

All the functions squeeze and reshape do is change the dim_vector for
the octave_value, without touching the underlying data which is stored
essentially as a vector. So there is no transpose involved, and it is
thus a low cost operation. If what you want is the transpose of this
then you have no choice you must touch the underlying data, thus
"transpose(squeeze(x))" is probably optimal.

D.

-- 
David Bateman                                address@hidden
Motorola CRM                                 +33 1 69 35 48 04 (Ph) 
Parc Les Algorithmes, Commune de St Aubin    +33 1 69 35 77 01 (Fax) 
91193 Gif-Sur-Yvette FRANCE

The information contained in this communication has been classified as: 

[x] General Business Information 
[ ] Motorola Internal Use Only 
[ ] Motorola Confidential Proprietary



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------