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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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8
Task/Entropy/Haskell/entropy-1.hs Normal file
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import Data.List
main = print $ entropy "1223334444"
entropy :: (Ord a, Floating c) => [a] -> c
entropy = sum . map lg . fq . map genericLength . group . sort
where lg c = -c * logBase 2 c
fq c = let sc = sum c in map (/ sc) c

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Task/Entropy/Haskell/entropy-2.hs Normal file
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import Data.List (genericLength, group, sort)
entropy
:: (Ord a, Floating c)
=> [a] -> c
entropy =
sum .
map (negate . ((*) <*> logBase 2)) .
(map =<< flip (/) . sum) . map genericLength . group . sort
main :: IO ()
main = print $ entropy "1223334444"