caluclating median distance
Gabriel Genellina
gagsl-py2 at yahoo.com.ar
Mon Oct 29 04:52:30 CET 2007
En Sun, 28 Oct 2007 11:13:39 -0300, Beema shafreen
<beema.shafreen at gmail.com> escribi�:
> 10000175 10000234 43 A_16_P03652190
> 10000277 10000336 387 A_16_P41582022
> 10000723 10000782 98 A_16_P03652191
>
> how to calculate the median spacing of an data in the file basically
> focusing on the third column of an file. say for example the median
> spacing
> is to be 635. how do we programtically calculate the median spacing and
> sort
> the file according to the third column's median spacing.
> hope median we calculate using (N+1)/2
I don't understand exactly what you want. To compute the median, the
easiest and obvious way is to sort the data first and choose the middle
element. For large sets, there are more efficient ways; see this recipe in
the Python Cookbook:
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/269554>
--
Gabriel Genellina
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