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Operations on sparse matricies (in 2.9.2)
From: |
Shaun Cloherty |
Subject: |
Operations on sparse matricies (in 2.9.2) |
Date: |
Thu, 28 Apr 2005 01:37:59 -0500 |
User-agent: |
Mozilla Thunderbird 1.0.2 (X11/20050408) |
I recently downloaded version 2.9.2 to explore its support for sparse
matrices. In my script I have a number of operations like this;
AM = kron(speye(N), D2M);
where N = 130 and D2M is a 82 x 82 sparse matrix.
I kind of expected the result (AM) to be a 10660 x 10660 sparse matrix
but octave returns a 10660 x 10660 full matrix (occupying something like
900Mb) which, to my naive understanding, seems to negate to some extent
the benefit of using sparse matrices. I am a complete novice on the
subject of sparse matrices so I have little idea if expectation is
reasonable or not. Am I missing something here or should I file a bug
report?
Regards,
Shaun
--
Shaun Cloherty
Graduate School of Biomedical Engineering
University of New South Wales
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- Operations on sparse matricies (in 2.9.2),
Shaun Cloherty <=