[Numpy-discussion] Broadcasting question
Thu Dec 4 10:53:36 CST 2008
2008/12/4 Stéfan van der Walt <firstname.lastname@example.org>:
> Hi Olivier
> 2008/12/4 Olivier Grisel <email@example.com>:
>> To avoid the python level loop I then tried to use broadcasting as follows:
>>>>> c = sum((a[:,newaxis,:] - b) ** 2, axis=2)
>> But this build a useless and huge (d1, d2, d3) temporary array that
>> does not fit in memory for large values of d1, d2 and d3...
> Does numpy.lib.broadcast_arrays do what you need?
That looks exactly what I am looking for. Apparently this is new in
1.2 since I cannot find it in the 1.1 version of my system.
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