[Numpy-discussion] choose() broadcasting
Travis E. Oliphant
Fri Oct 17 16:31:31 CDT 2008
Roman Bertle wrote:
> * Travis E. Oliphant <firstname.lastname@example.org> [081003 22:20]:
>> Roman Bertle wrote:
>>> I have found something I call a bug in the numpy choose() method and
>>> wanted to report it in trac.
>> Thanks for your report. I'm not sure why you are having trouble with
>> Trac, but I've created a ticket for this problem.
> trac works for me know. And thank you for fixing the bug, the svn numpy
> version works now for me. But there remains an issue I want to report.
> choose is much slower in numpy than in numarray, and even more if an
> output array is specified, as these tests show:
Thanks for the report. You should add another ticket for this case. I
suspect it might be a result of the extra copies that are done in the
PyArray_Choose routine because the algorithm assumes contiguous arrays.
It deserves a look. It probably wouldn't be too difficult to avoid the
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