Standard Deviation/Variance function development

Has anybodys grabbed development of a standard deviation/variance
calculation function?
If not, I am interested in tacking it on my todo list.

What would be involved?
That is, should it be written in C or in PL/PgSQL, or what?
(I imagine that C would be fastest, no?)

It is marked with a dash, meaning it is done and will be in 7.1.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
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On Tue, Mar 06, 2001 at 09:15:15PM -0500, some SMTP stream spewed forth:

Has anybodys grabbed development of a standard deviation/variance
calculation function?
If not, I am interested in tacking it on my todo list.

What would be involved?
That is, should it be written in C or in PL/PgSQL, or what?
(I imagine that C would be fastest, no?)

It is marked with a dash, meaning it is done and will be in 7.1.

Hehe, I suppose actually /reading/ would be a good start, eh?

Thanks for the clue-smack.

Now I have to find something else to do.

dan