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Ingy döt Net 2013-04-11 01:07:29 -07:00
parent b83f433714
commit 68f8f3e56b
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17
Task/Unbias-a-random-generator/Clojure/unbias-a-random-generator.clj Normal file
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(defn biased [n]
(if (< (rand 2) (/ n)) 0 1))
(defn unbiased [n]
(loop [a 0 b 0]
(if (= a b)
(recur (biased n) (biased n))
a)))
(for [n (range 3 7)]
[n
(double (/ (apply + (take 50000 (repeatedly #(biased n)))) 50000))
(double (/ (apply + (take 50000 (repeatedly #(unbiased n)))) 50000))])
([3 0.83292 0.50422]
[4 0.87684 0.5023]
[5 0.90122 0.49728]
[6 0.91526 0.5])