[SciPy-dev] Possibly bug in Sparse.py
Nils Wagner
nwagner at mecha.uni-stuttgart.de
Thu Feb 17 10:10:18 EST 2005
Hi all,
I am going to solve large-scale linear systems of equations.
The test matrices can be found at
http://www.imtek.uni-freiburg.de/simulation/benchmark/?li=30&nr=38886
File "meerbergen.py", line 34, in ?
y, info = linalg.bicgstab(omega[i]*B-A,v)
File "/usr/lib/python2.3/site-packages/scipy/sparse/Sparse.py", line
441, in __sub__
c,rowc,ptrc,ierr =
func(data1,self.rowind,self.indptr,-data2,other.rowind,other.indptr)
File "/usr/lib/python2.3/site-packages/scipy/sparse/Sparse.py", line
210, in __getattr__
raise AttributeError, attr + " not found."
AttributeError: rowind not found.
>>> A
<22692x22692 sparse matrix of type 'D' with 1482390 stored elements
(space for 1482390) in
COOrdinate format>
>>> B
<22692x22692 sparse matrix of type 'd' with 1481988 stored elements
(space for 1481988) in
COOrdinate format>
>>> omega[i]
(0.049939772810258624+0.0024533837163709009j)
>>>
Any suggestion would be appreciated.
Thanks in advance
Nils
P.S. Is there any progress in supporting sparse eigensolvers (e.g.
ARPACK) in scipy ?
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