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Implement sparse * diagonal and diagonal * sparse operations, double-prec only.
Date: Sun, 8 Mar 2009 16:28:18 -0400
These preserve sparsity, so eye(5) * sprand (5, 5, .2) is *sparse*
and not dense. This may affect people who use multiplication by
eye() rather than full().
The liboctave routines do *not* check if arguments are scalars in
disguise. There is a type problem with checking at that level. I
suspect we want diag * "sparse scalar" to stay diagonal, but we have
to return a sparse matrix at the liboctave. Rather than worrying
about that in liboctave, we cope with it when binding to Octave and
return the correct higher-level type.
The implementation is in Sparse-diag-op-defs.h rather than
Sparse-op-defs.h to limit recompilation. And the implementations
are templates rather than macros to produce better compiler errors
and debugging information.
author | Jason Riedy <jason@acm.org> |
---|---|
date | Mon, 09 Mar 2009 17:49:13 -0400 |
parents | 5eb3db6e4042 |
children | 50c7d87ecfa1 |
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If you have trouble transferring Octave from this site, you might try one of those listed below. They mirror the /pub/octave directory on ftp.octave.org FTP: site directory ---- --------- ftp.eos.hokudai.ac.jp /pub/GNU/misc/octave ftp.u-aizu.ac.jp /pub/SciEng/numanal/Octave neacm.fe.up.pt /pub/octave HTTP: url --- http://neacm.fe.up.pt/pub/octave http://octave.oss-mirror.org http://octave.linux-mirror.org John W. Eaton jwe@bevo.che.wisc.edu University of Wisconsin-Madison Department of Chemical & Biological Engineering Wed, 31 Oct 2007 16:32:44 EDT