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Re: Sparse functions for octave
From: |
John W. Eaton |
Subject: |
Re: Sparse functions for octave |
Date: |
Sun, 28 Nov 1999 21:59:00 -0600 (CST) |
On 27-Nov-1999, A+A Adler <address@hidden> wrote:
| On Tue, 16 Nov 1999, John W. Eaton wrote:
| > On 16-Nov-1999, A+A Adler <address@hidden> wrote:
| > | Great, thanks. I've now got indexing working on sparse variables.
|
| I have a few more questions about indexing
|
| 1. When M(idx,:) is specified, what is the idx_vector set to
| for the ':' ?
You can use the method
int is_colon (void) const;
which returns nonzero if the index is `:'.
| 2. What methods does [ M1, M2 ] map to internally?
Hmm. None really. This is something that probably needs to be
changed. The parser handles the details of matrix construction. When
I wrote it, I didn't fully anticipate the need to handle other types
of objects in these expressions.
| Also, while putting together a test script for the sparse
| functions I use exist('__OCTAVE_VERSION__') to destinguish
| octave from Matlab. This no longer works in 2.1.19
|
| octave-2.1.19:1> __OCTAVE_VERSION__
| __OCTAVE_VERSION__ = 2.1.19
| octave-2.1.19:2> exist('__OCTAVE_VERSION__')
| ans = 0
|
| However,
| octave-2.0.14:1> __OCTAVE_VERSION__
| __OCTAVE_VERSION__ = 2.0.14
| octave-2.0.14:2> exist('__OCTAVE_VERSION__')
| ans = 1
This is a bug that should be fixed now, at least in the CVS archive.
jwe
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-----------------------------------------------------------------------
- Re: Sparse functions for octave, A+A Adler, 1999/11/13
- Re: Sparse functions for octave, John W. Eaton, 1999/11/13
- 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 <=