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Ingy döt Net 2023-07-01 11:58:00 -04:00
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commit cb5bb5e222
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Task/Cumulative-standard-deviation/Racket/cumulative-standard-deviation.rkt Normal file
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#lang racket
(require math)
(define running-stddev
(let ([ns '()])
(λ(n) (set! ns (cons n ns)) (stddev ns))))
;; run it on each number, return the last result
(last (map running-stddev '(2 4 4 4 5 5 7 9)))