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2016 Update

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This commit is contained in:
Tina Müller 2016-12-05 22:15:40 +01:00
parent 948b86eafa
commit dcf5d15da3
7965 changed files with 139854 additions and 31002 deletions
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8
Task/Entropy/Haskell/entropy.hs
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@ -2,7 +2,7 @@ import Data.List
main = print $ entropy "1223334444"
entropy s =
sum . map lg' . fq' . map (fromIntegral.length) . group . sort $ s
where lg' c = (c * ) . logBase 2 $ 1.0 / c
fq' c = let sc = sum c in map (/ sc) c
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