On 10/03/2016 11:43, Heli wrote:
Dear all,
I need to loop over a numpy array and then do the following search. The
following is taking almost 60(s) for an array (npArray1 and npArray2 in the
example below) with around 300K values.
for id in np.nditer(npArray1):
newId=(np.where(npArray2==id))[0][0]
Is there anyway I can make the above faster? I need to run the script above on
much bigger arrays (50M). Please note that my two numpy arrays in the lines
above, npArray1 and npArray2 are not necessarily the same size, but they are
both 1d.
Thanks a lot for your help,
I'm no numpy expert, but if you're using a loop my guess is that you're
doing it wrong. I suggest your first port of call is the numpy docs if
you haven't all ready been there, then the specific numpy mailing list
or stackoverflow, as it seems very likely that this type of question has
been asked before.
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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