[SciPy-user] Bug in io.mmread

Nils Wagner nwagner at mecha.uni-stuttgart.de
Mon Nov 8 09:03:08 CST 2004

Hi all,

I have some trouble when using mmread; k0.mtx is large and sparse matrix.

%%MatrixMarket matrix coordinate real general
% Generated 08-Nov-2004
67986 67986 4222171

Traceback (most recent call last):
  File "test1.py", line 4, in ?
    ma = io.mmread('k0.mtx')
  File "/usr/lib/python2.3/site-packages/scipy/io/mmio.py", line 208, in 
    a = coo_matrix(data,(row,col),M=rows,N=cols)
  File "/usr/lib/python2.3/site-packages/scipy/sparse/Sparse.py", line 
1366, in __init__
  File "/usr/lib/python2.3/site-packages/scipy/sparse/Sparse.py", line 
1376, in _check
    self.ftype = _transtabl[self.typecode]
KeyError: 'O'

Any pointer would be appreciated.


More information about the SciPy-user mailing list