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Pig, mail # user - Percentile UDF


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Re: Percentile UDF
Kris Coward 2011-03-10, 18:38
On Thu, Mar 10, 2011 at 03:24:52PM +0000, Jonathan Holloway wrote:
> HI all,
>
> Does anybody have a UDF for calculating the percentile (median, 99%) at all?
>  I took a look at the builtins
> and the piggybank project, but couldn't seem to see anything.  Is there a
> reason why there isn't a builtin for
> this?

I think it would be because there's an inherently serial problem in
there (i.e. numbering each entry based on its place in the ordered
list).

Cheers,
Kris

--
Kris Coward http://unripe.melon.org/
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