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Ingy döt Net 2013-10-27 22:24:23 +00:00
parent 6f050a029e
commit 776bba907c
3887 changed files with 59894 additions and 7280 deletions
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9
Task/Entropy/Clojure/entropy-1.clj Normal file
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(defn entropy [s]
(let [len (count s)
freqs (frequencies s)
log-of-2 (Math/log 2)]
(->> (keys freqs)
(map (fn [c]
(let [rf (/ (get freqs c) len)]
(* -1 rf (/ (Math/log rf) log-of-2)))))
(reduce +))))

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Task/Entropy/Clojure/entropy-2.clj Normal file
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(H "1223334444")
1.8464393446710154