quickly looping over a 2D array?

Robert Kern robert.kern at gmail.com
Mon Jul 27 18:11:02 CEST 2009


On 2009-07-27 06:24, Martin wrote:
> Hi,
>
> I am new to python and I was wondering if there was a way to speed up
> the way I index 2D arrays when I need to check two arrays
> simultaneously? My current implementations is (using numpy) something
> like the following...
>
> for i in range(numrows):
>      for j in range(numcols):
>
>          if array_1[i, j] == some_value or array_2[i, j]>= array_1[i,
> j] * some_other_value
>              array_1[i, j] = some_new_value

Peter has given you good answers, but you will probably want to ask future numpy 
questions on the numpy mailing list.

   http://www.scipy.org/Mailing_Lists

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco




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