[Numpy-discussion] sparse.hstack with empty sparse matrices
David Koch
ogdude@googlemail....
Mon Apr 12 10:50:19 CDT 2010
Hello,
For scipy.sparse.csc_matrices, is there an equivalent for the
following dense array operation?
Example:
tempA = scipy.empty((10,0))
tempB = scipy.random.random((10,1))
scipy.hstack((tempA, tempB))
i.e - you concatenate an empty n x 0 sparse matrix with a n x 1 sparse
matrix to yield a n x 1 output
I need to do this so I can iteratively build a matrix by adding new
columns. The problem is that sparse matrix constructors don't seem
expect "0" as input for a dimension.
Thank you,
/David
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