On Jul 1, 2008, at 8:15 AM, Max Williams wrote:

>
> Maybe there is...it's a little program to help my wife out with a  
> bit of
> data processing.  I have a bunch of columns (50ish) that each list a
> group of people.  The people overlap between columns and we want to  
> look
> at what happens to the total degree of overlap when groups of columns
> are removed.  So, i was going to try removing each column and  
> calculate
> the total overlap for each case.  Then, remove every possible pair of
> columns, recalculate for each case.  Then, every possible trio of
> columns, etc.  And keep going until the number of subsets to test  
> starts
> to get impractical.  Which might happen quite quickly as you suggest.
> -- 


gem install permutation


it's *super* fast.

a @ http://codeforpeople.com/
--
we can deny everything, except that we have the possibility of being  
better. simply reflect on that.
h.h. the 14th dalai lama