Cumulative standard deviation: Difference between revisions
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Line 1,907:
<lang Haskell>import Data.List (mapAccumL)
-------------- CUMULATIVE STANDARD DEVIATION -------------
cumulativeStdDevns :: [Float] -> [Float]
cumulativeStdDevns
where
go (s, q) (i, x) =
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_q = q + (x ^ 2)
in ((_s, _q), sqrt ((_q / i) - ((_s / i) ^ 2)))
--------------------------- TEST -------------------------
main :: IO ()
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