[Numpy-discussion] kron with matrices

Sven Schreiber svetosch at gmx.net
Tue Apr 4 16:03:02 CDT 2006


Hi,
first of all thanks for including kron in numpy, it's very useful.

Now I have just built numpy from svn for the first time in order to spot
matrix-related bugs before a new release as promised. That worked well,
thanks to the great wiki instructions.

The old bugs (in linalg) are gone, but I wonder whether the following
behavior is another one:

>>> import numpy as n
>>> n.kron(n.asmatrix(n.ones((1,2))), n.asmatrix(n.zeros((2,2))))
array([[0, 0, 0, 0],
       [0, 0, 0, 0]])

I would prefer if kron returned a matrix at least if both inputs are
matrices, as in the given example.

Thanks,
Sven




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