Re: ASCII file format for sparse matrices?

[david moloney]

MatrixMarket and Harwell Boeing files can also be loaded by using the appropriate Matlab code

http://math.nist.gov/MatrixMarket/formats.html#hb

http://math.nist.gov/MatrixMarket/mmio/matlab/mmiomatlab.html

http://math.nist.gov/MatrixMarket/src/dm2hb.m

With these functions you can load matrices from MartixMarket or University of Florida sparse matrix repositories etc.

http://math.nist.gov/MatrixMarket/

http://www.cise.ufl.edu/research/sparse/matrices/

Regards,

-David

On Fri, May 13, 2011 at 10:51 AM, Rui Maciel <address@hidden> wrote:

On 05/13/2011 07:44 AM, David Bateman wrote:

Yes octave uses CCS internal and only  supports CCS when reading from files. However, you can always save the dara, row and column indices separately and then use

Are there any plans to support other sparse matrix input schemes in octave's load() command?  It is a shame that the file format is able to handle any order the coefficients are provided but load()'s internals are limited in that aspect, not to mention that they fail silently. At least it would be very useful to support importing sparse matrices with the coefficients ordered as the compressed row format, but a format that supported any coefficients order would be better.



Rui Maciel
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