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Re: Diagonal v. sparse matrices
From: |
Jason Riedy |
Subject: |
Re: Diagonal v. sparse matrices |
Date: |
Wed, 04 Mar 2009 15:47:08 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.91 (gnu/linux) |
And Jaroslav Hajek writes:
> What's wrong with it? Besides, in current tip you get
> P =
> Permutation Matrix
> 0 1 1
> 1 0 1
> 1 1 0
It should be
1 0 0
0 1 0
0 0 1
to match traditional mathematical notation.
> What exactly are you trying to achieve? Remember that most sparse vs.
> diag ops return a full matrix for compatibility with matlab, and
> changing that would be a significant breach.
I don't care about Matlab(TM). I don't use it. They don't want
me as a user, personally or as a class; they're targeting a
different market now.
> That's what I did for the mx-op-defs and MArray-defs. I think there
> was some speed up, but still not what I was hoping for. So I guess C++
> is just slow, and we need to live with that.
I'll look into that. I'd hope it'd break some of the dependency
chains. It's the *re*building of everything that's killing me.
Jason
- Re: deprecated functions, (continued)
- Re: deprecated functions, John W. Eaton, 2009/03/04
- Diagonal v. sparse matrices [was Re: deprecated functions], Jason Riedy, 2009/03/04
- Diagonal v. sparse matrices [was Re: deprecated functions], John W. Eaton, 2009/03/04
- Re: Diagonal v. sparse matrices [was Re: deprecated functions], Jaroslav Hajek, 2009/03/04
- Re: Diagonal v. sparse matrices [was Re: deprecated functions], John W. Eaton, 2009/03/04
- Re: Diagonal v. sparse matrices [was Re: deprecated functions], Jaroslav Hajek, 2009/03/04
- Re: Diagonal v. sparse matrices [was Re: deprecated functions], John W. Eaton, 2009/03/04
- Re: Diagonal v. sparse matrices [was Re: deprecated functions], Jaroslav Hajek, 2009/03/05
- Re: Diagonal v. sparse matrices [was Re: deprecated functions], John W. Eaton, 2009/03/05
- Re: Diagonal v. sparse matrices [was Re: deprecated functions], Jaroslav Hajek, 2009/03/04
- Re: Diagonal v. sparse matrices,
Jason Riedy <=
- Re: Diagonal v. sparse matrices, Jaroslav Hajek, 2009/03/04
- Re: Diagonal v. sparse matrices, Jaroslav Hajek, 2009/03/04
- Re: deprecated functions, Jaroslav Hajek, 2009/03/04
- Re: deprecated functions, John W. Eaton, 2009/03/04
- Re: deprecated functions, Jaroslav Hajek, 2009/03/04
- Re: deprecated functions, John W. Eaton, 2009/03/04
- Re: deprecated functions, Jaroslav Hajek, 2009/03/04
- Re: deprecated functions, John W. Eaton, 2009/03/04
- Re: deprecated functions, Jason Riedy, 2009/03/04
- Re: deprecated functions, Jaroslav Hajek, 2009/03/04