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I have the following function:
-- | Exponential moving average.
ema :: (Fractional a)
=> a -- ^ Alpha
-> [a] -- ^ Input data
-> [a] -- ^ Output
ema alpha xs = scanl1 (\a b -> a+(alpha*(b-a))) xs
Haddock takes the above and generates the following HTML:
ema
:: Fractional a
=> a Input data
-> [a] Output
-> [a]
Exponential moving average.
What happened to “Alpha” ?
You’re probably using haddock 2.6.0. Upgrading to 2.7.2 fixes this issue.