[SciPy-user] hash function on arrays

Tom Johnson tjhnson@gmail....
Tue Oct 9 15:39:17 CDT 2007


Hi,

I need to do comparisons on a very large number of arrays.  I was
thinking that it might speed things up if I first compared on a hash
value...and then compared on those arrays with the same hash value (if
needed)

I am wondering:

1) about other methods for doing this...
2) how many collisions I can expect...(that is, will this technique be
effective)
3) what is the hash function (specific to scipy arrays or just python's builtin)

Thanks.


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