[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: row vectors changed to column vectors?
From: |
Christian T. Steigies |
Subject: |
Re: row vectors changed to column vectors? |
Date: |
Wed, 11 Feb 2004 08:38:14 +0100 |
User-agent: |
Mutt/1.5.5.1+cvs20040105i |
On Tue, Feb 10, 2004 at 11:59:43AM -0600, Mike Miller wrote:
> >
> > Yes, it is slow, what do you suggest? Should I create a matrix with
> > zero(N,1) first? Looks as if it is just a few ms difference.
>
> If N is 1000000, is it still just a matter of a few ms? For small N there
> well be very little difference. I think the zeros(N,1) method is good.
1e6 might be a little hard on my notebook, especially when I need to create
a NxN matrix out of it. For small N it does not seem to make a difference at
all, the rest of the algorithm is way more inefficient. But in my case, N
wont be too large. Thanks anyway, I can sure use that later on.
> If you can be more exlicit about what you're doing (e.g., with "gluing"
> and "rotating"), we might help you better.
Sorry, I lack the mathematical terms for that, but this is solved thanks to
Przemek Klosowski, Paul Kienzle, and toeplitz().
Christian
-------------------------------------------------------------
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
-------------------------------------------------------------
- row vectors changed to column vectors?, Christian T. Steigies, 2004/02/10
- row vectors changed to column vectors?, John W. Eaton, 2004/02/10
- Re: row vectors changed to column vectors?, Jonathan Stickel, 2004/02/10
- Re: row vectors changed to column vectors?, Christian T. Steigies, 2004/02/10
- Re: row vectors changed to column vectors?, Mike Miller, 2004/02/10
- Re: row vectors changed to column vectors?,
Christian T. Steigies <=
- Re: row vectors changed to column vectors?, Christoph Dalitz, 2004/02/10
- Re: row vectors changed to column vectors?, Przemek Klosowski, 2004/02/10
- Re: row vectors changed to column vectors?, Christian T. Steigies, 2004/02/11
- Re: row vectors changed to column vectors?, Henry F. Mollet, 2004/02/11
- Re: row vectors changed to column vectors?, Paul Kienzle, 2004/02/10
- Re: row vectors changed to column vectors?, Andy Adler, 2004/02/11
- Re: row vectors changed to column vectors?, Paul Kienzle, 2004/02/11