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Re: no data exclution and unique combination.

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From Terry Reedy <tjreedy@udel.edu>
Subject Re: no data exclution and unique combination.
Date Thu, 09 Aug 2012 17:33:58 -0400
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On 8/9/2012 4:06 PM, giuseppe.amatulli@gmail.com wrote:
> Terry and MRAB,
> thanks for yours suggestions,
> in the end i found this solution
>
>
> mask=( a != 0 ) & ( b != 0  )
>
> a_mask=a[mask]
> b_mask=b[mask]
>
> array2D = np.array(zip(a_mask,b_mask))
>
> unique=dict()
> for row in  array2D :
>      row = tuple(row)
>      if row in unique:
>          unique[row] += 1
>      else:
>          unique[row] = 1

I believe the 4 lines above are equivalent to
    unique[row] = unique.get(row, 0) + 1

-- 
Terry Jan Reedy

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Thread

no data exclution and unique combination. giuseppe.amatulli@gmail.com - 2012-07-24 11:27 -0700
  Re: no data exclution and unique combination. MRAB <python@mrabarnett.plus.com> - 2012-07-24 19:51 +0100
  Re: no data exclution and unique combination. MRAB <python@mrabarnett.plus.com> - 2012-07-24 20:08 +0100
  Re: no data exclution and unique combination. Terry Reedy <tjreedy@udel.edu> - 2012-07-24 15:32 -0400
  Re: no data exclution and unique combination. giuseppe.amatulli@gmail.com - 2012-08-09 13:06 -0700
    Re: no data exclution and unique combination. Dave Angel <d@davea.name> - 2012-08-09 17:23 -0400
    Re: no data exclution and unique combination. Terry Reedy <tjreedy@udel.edu> - 2012-08-09 17:33 -0400
      Re: no data exclution and unique combination. Hans Mulder <hansmu@xs4all.nl> - 2012-08-10 10:47 +0200

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