[Numpy-discussion] Broadcasting question

[Olivier Grisel]

2008/12/4 Stéfan van der Walt <stefan at sun.ac.za>:
> Hi Olivier
>
> 2008/12/4 Olivier Grisel <olivier.grisel at ensta.org>:
>> 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.

Thanks,

-- 
Olivier