[Numpy-discussion] Find indices of largest elements
Fri Apr 16 06:09:29 CDT 2010
Nikolaus Rath wrote:
> eat <firstname.lastname@example.org> writes:
>> Nikolaus Rath <Nikolaus <at> rath.org> writes:
>>> Not quite, because I'm interested in the n largest values over all
>>> elements, not the largest element in each row or column. But Keith's
>>> solution seems to work fine, even though I'm still struggling to
>>> understand what's going on there .
>> My bad. I just concentrated on your example, not the actual question.
>> However, what's wrong with your above approach
>> "[ np.unravel_index(i, x.shape) for i in idx[-3:] ]" ?
>> Especially if your n largest elements are just a small fraction of all
> The fact that it sorts the entire list. But since for my arrays it's not
> really an efficiency problem, I will use it anyway.
I use boost::python and pyublas to package a function that exposes the c++
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