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Re: Sparse functions for octave
From: |
John W. Eaton |
Subject: |
Re: Sparse functions for octave |
Date: |
Sat, 13 Nov 1999 21:37:37 -0600 (CST) |
On 13-Nov-1999, A+A Adler <address@hidden> wrote:
| On Fri, 29 Oct 1999, John W. Eaton wrote:
| > I'd rather say it was just an incomplete example.
| > You can get the other operators if you add the following code:
| > [ code snipped ]
|
| Great, thanks. I've got UNOPS working and also have
| full( sparse_matrix ) working using the get_rep member
| function in 2.1.19.
|
| Now, I need to add indexing to sparse matrices, to that you can
| do:
|
| x(1:2,1:2) for sparse x.
|
| I've defined member functions:
|
| octave_value octave_sparse::index (idx_vector colv, idx_vector rowv ) ;
|
| and
|
| octave_value octave_sparse::extract (int r1, int c1, int r2, int c2) ;
|
| but this doesn't seem to work.
|
| octave-2.1.19:3> x=make_sparse(eye(5));
| installing sparse type at type-id = 18
| DEBUG:sparse( SuperMatrix A)
| DEBUG:sparse destructor
| octave-2.1.19:4> x(1:2,1:2)
| error: can't perform indexing operations for sparse type
|
| What is the right way to do this?
You need to define a function called do_index_op() with the following
signature:
octave_value do_index_op (const octave_value_list& idx)
For example, look at ov-base-mat.cc.
jwe
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- Re: Sparse functions for octave, A+A Adler, 1999/11/13
- Re: Sparse functions for octave,
John W. Eaton <=
- Re: Sparse functions for octave, A+A Adler, 1999/11/15
- Re: Sparse functions for octave, John W. Eaton, 1999/11/15
- Re: Sparse functions for octave, A+A Adler, 1999/11/16
- Re: Sparse functions for octave, John W. Eaton, 1999/11/16
- Re: Sparse functions for octave, A+A Adler, 1999/11/26
- Re: Sparse functions for octave, Mike Miller, 1999/11/27
- Re: Sparse functions for octave, John W. Eaton, 1999/11/28