Re: [Numpy-discussion] indexing with arrays of indexes and +=

[David H. <dav...@gm...>]

2006/10/24, Vincent Schut <sc...@sa...>:
>
> It is clear to me that the numpy += operator in combination with the use
> of arrays of indexes, as is explained in the Tentative Numpy Tutorial
> (
> http://www.scipy.org/Tentative_NumPy_Tutorial#head-3f4d28139e045a442f78c5218c379af64c2c8c9e
> ),
> the limitation being that indexes that appear more than 1 time in the
> indexes-array will get incremented only once.
>
> Does anybody know a way to work around this?
>

I am using this to fill up a custom nd-histogram, and obviously each bin
> should be able to get incremented more than once. Looping over the
> entire array and incrementing each bin succesively takes waaay to long
> (these are pretty large arrays, like 4000x2000 items, or even larger)
>
>
I don't know the answer to the first question, but I'd like to ask if you
tried histogramdd ? If its lacking some features, i'd be willing to
implement them.

David