Set operations in Numeric

George Sakkis george.sakkis at gmail.com
Mon Oct 23 19:20:16 CEST 2006


Robert Kern wrote:
> George Sakkis wrote:
> > Is there a way to handle numeric (or numarray or numpy) arrays as sets
> > and compute efficiently their intersection, union, etc. ? I hope there
> > is a faster way than s = array(set(A) & set(B)). Can this be done with
> > masked arrays maybe ? I've never used them though and browsing through
> > the docs didn't make clear if it is possible.
>
> You'll probably want to ask such questions on the numpy list:
>
>    http://www.scipy.org/Mailing_Lists
>
> Robert Cimrman has implemented a number of set operations based on sorting.
>
>    http://svn.scipy.org/svn/scipy/trunk/Lib/sandbox/arraysetops/arraysetops.py

Thank you so much, these fit the bill perfectly !

George




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