[SciPy-user] Sparse matrix todense

Dinesh B Vadhia dineshbvadhia@hotmail....
Thu Apr 24 17:18:03 CDT 2008


Hi!  The following code worked until I installed the latest svn.  I want to select a particular row (eg. row=1818) from the sparse matrix A:

> import numpy
> import scipy
> from scipy import sparse
<snip>
> A = sparse.csr_matrix(A)
> q[0,:] = sparse.csr_matrix.todense(sparse.csr_matrix.getrow(A, 1818))

The Traceback is:
Traceback (most recent call last):
  File "C:\...\.py", line 157, in <module>
    q[0,:] = sparse.csr_matrix.todense(sparse.csr_matrix.getrow(A, 1818))
  File "C:\Python25\Lib\site-packages\scipy\sparse\base.py", line 357, in getrow
    a = csr_matrix((1, m), dtype=self.dtype)
NameError: global name 'csr_matrix' is not defined

Thanks!

Dinesh


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