[Numpy-discussion] Fwd: Numpy for data manipulation

Alex Rogozhnikov alex.rogozhnikov at yandex.ru
Tue Oct 6 20:26:22 EDT 2015


Thanks for comments, I've fixed the named issues.

Code is python2&3 compatible, I aliased numpy and used better inversion.
Specially thanks for pointing at histogram equalization - I've added 
example for images.
Probably some other 'visual' examples would help - I'll try to invent 
something to other points, but this is not simple.

(I left %matplolib inline due to more appropriate rendering)

Alex.

02.10.15 10:50, Kiko пишет:
>
>
> 2015-10-02 9:48 GMT+02:00 Kiko <kikocorreoso at gmail.com 
> <mailto:kikocorreoso at gmail.com>>:
>
>
>
>     2015-10-02 9:38 GMT+02:00 Alex Rogozhnikov
>     <alex.rogozhnikov at yandex.ru <mailto:alex.rogozhnikov at yandex.ru>>:
>
>             I would suggest
>
>             %matplotlib notebook
>
>             It will still have to a nice png, but you get an
>             interactive figure when it is live.
>
>
>         Amazing, thanks. I was using mpld3 for this.
>         (for some strange reason I need to put %matplotlib notebook
>         before each plot)
>
>
>     You should create a figure before each plot instead of putthon
>     %matplotlib notebook
>     plt.figure()
>     ....
>
>
> putthon == putting
>
>
>             The recommendation of inverting a permutation by
>             argsort'ing it, while it works, is suboptimal, as it takes
>             O(n log(n)) time, and you can do it in linear time:
>
>         Actually, there is (later in post) a linear solution using
>         bincount, but your code is definitely better. Thanks!
>
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>
>
>
>
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