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Exercise 1.43

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Correl Roush 2014-06-02 11:48:46 -04:00
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@ -635,6 +635,18 @@ layout: org
Hint: You may find it convenient to use `compose' from *Note
Exercise 1-42::.
----------------------------------------------------------------------
#+begin_src scheme :tangle yes
;; -------------------------------------------------------------------
;; Exercise 1.43
;; -------------------------------------------------------------------
(define (repeated f times)
(if (= times 1)
(lambda (x) (f x))
(compose f (repeated f (- times 1)))))
#+end_src
** Exercise 1.44
The idea of "smoothing" a function is an important concept in
signal processing. If f is a function and dx is some small number,