[Numpy-discussion] Matrix times scalar is wacky
Travis Oliphant
oliphant.travis at ieee.org
Fri Feb 24 01:59:02 CST 2006
Bill Baxter wrote:
> Multiplying a matrix times a scalar seems to return junk for some reason:
>
> >>> A = numpy.asmatrix(numpy.rand(1,2))
> >>> A
> matrix([[ 0.30604211, 0.98475225]])
> >>> A * 0.2
> matrix([[ 6.12084210e-002, 7.18482614e-290]])
> >>> 0.2 * A
> matrix([[ 6.12084210e-002, 7.18482614e-290]])
> >>> numpy.__version__
Unfortunately, there are still some bugs in the scalar multiplication
section of _dotblas.c stemming from a re-write that allows
discontiguous matrices. We are still tracking down the problems.
Hopefully this should be fixed soon.
-Travis
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