[SciPy-user] sparse matrix formats
David Grant
david at dwavesys.com
Tue Oct 26 15:39:48 CDT 2004
I am a bit boggled by all these sparse matrix types in the sparse class.
Can anyone recommend which are the standard one I should use (when in
doubt)?
I know that one of my matrices is a diagonal matrix and the other matrix
is 100% dense, however, it is tensor-producted with the identity matrix,
so it becomes less dense. Some elements will be close to zero and can be
truncated as well. Most values will be around the diagonals close to
the main diagonal.
_formats = {'csc':[0,"Compressed Sparse Column"],
'csr':[1,"Compressed Sparse Row"],
'dok':[2,"Dictionary Of Keys"],
'lil':[3,"LInked List"],
'dod':[4,"Dictionary of Dictionaries"],
'sss':[5,"Symmetric Sparse Skyline"],
'coo':[6,"COOrdinate"],
'lba':[7,"Linpack BAnded"],
'egd':[8,"Ellpack-itpack Generalized Diagonal"],
'dia':[9,"DIAgonal"],
'bsr':[10,"Block Sparse Row"],
'msr':[11,"Modified compressed Sparse Row"],
'bsc':[12,"Block Sparse Column"],
'msc':[13,"Modified compressed Sparse Column"],
'ssk':[14,"Symmetric SKyline"],
'nsk':[15,"Nonsymmetric SKyline"],
'jad':[16,"JAgged Diagonal"],
'uss':[17,"Unsymmetric Sparse Skyline"],
'vbr':[18,"Variable Block Row"],
'und':[19,"Undefined"]
}
--
David J. Grant
Scientific Officer
Intellectual Property
D-Wave Systems Inc.
tel: 604.732.6604
fax: 604.732.6614
**************************
CONFIDENTIAL COMMUNICATION
This electronic transmission, and any documents attached hereto, is
confidential. The information is intended only for use by the recipient
named above. If you have received this electronic message in error,
please notify the sender and delete the electronic message. Any
disclosure, copying, distribution, or use of the contents of
information received in error is strictly prohibited.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: david.vcf
Type: text/x-vcard
Size: 334 bytes
Desc: not available
Url : http://www.scipy.net/pipermail/scipy-user/attachments/20041026/25dc980f/david.vcf
More information about the SciPy-user
mailing list