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{"id":772,"date":"2011-11-06T13:09:32","date_gmt":"2011-11-06T04:09:32","guid":{"rendered":"http:\/\/blog.bugyo.tk\/b-log\/?p=772"},"modified":"2011-11-09T22:19:32","modified_gmt":"2011-11-09T13:19:32","slug":"scheme-%e5%be%ae%e5%88%86%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/blog.bugyo.tk\/b-log\/archives\/772","title":{"rendered":"[\u6570\u5f0f\u51e6\u7406][Scheme] \u5fae\u5206\u3059\u308b"},"content":{"rendered":"\u8907\u96d1\u306a\u5fae\u5206\u3092\u3059\u308b\u3068\u304d\u306f\u8a08\u7b97\u6a5f\u306b\u4efb\u305b\u305f\u65b9\u304c\u826f\u3044\u3088\u3046\u306b\u601d\u3046\u3002<\/p>\n
Scheme \u3067\u5fae\u5206\u3059\u308b\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3002<\/p>\n
\r\n(define (deriv exp var)\r\n (cond ((eq? exp var) 1)\r\n\t((not (pair? exp)) 0)\r\n\t((eq? (car exp) '-)\r\n\t `(- ,(deriv (cadr exp) var)))\r\n\t((eq? (car exp) '+)\r\n\t `(+ ,(deriv (cadr exp) var) ,(deriv (caddr exp) var)))\r\n\t((eq? (car exp) '*)\r\n\t `(+ (* ,(deriv (cadr exp) var)\r\n\t\t,(caddr exp))\r\n\t (* ,(cadr exp)\r\n\t\t,(deriv (caddr exp) var))))\r\n\t((eq? (car exp) 'expt)\r\n\t (let ((g (cadr exp))\r\n\t (n (caddr exp)))\r\n\t `(* (* ,n (expt ,g ,(- n 1))) ,(deriv g var))))\r\n\t((eq? (car exp) 'sin)\r\n\t `(* (cos ,(cadr exp)) ,(deriv (cadr exp) var)))\r\n\t((eq? (car exp) 'cos)\r\n\t `(* (- (sin ,(cadr exp))) ,(deriv (cadr exp) var)))\r\n ((eq? (car exp) 'tan)\r\n `(* (+ 1 (expt ,exp 2)) ,(deriv (cadr exp) var)))\r\n\t(else (error \"not yet.\"))))\r\n<\/pre>\n\r\n> (deriv '(expt (* (sin x) (cos x)) 1\/2)) 'x)\r\n=> (* (* 1\/2\r\n (expt (* (sin x) (cos x)) -1\/2))\r\n (+ (* (* (cos x) 1)\r\n\t (cos x))\r\n (* (sin x)\r\n\t (* (- (sin x)) 1))))\r\n<\/pre>\n`-‘ \u6f14\u7b97\u5b50\u306f\u5358\u9805\u6f14\u7b97\u5b50\u3068\u3057\u3066\u306e\u307f\u4f7f\u3048\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8907\u96d1\u306a\u5fae\u5206\u3092\u3059\u308b\u3068\u304d\u306f\u8a08\u7b97\u6a5f\u306b\u4efb\u305b\u305f\u65b9\u304c\u826f\u3044\u3088\u3046\u306b\u601d\u3046\u3002 Scheme \u3067\u5fae\u5206\u3059\u308b\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3002 (define (deriv exp var) (cond ((eq? exp var) 1) ((not (pair? exp)) 0) ((eq? (car exp) ‘-) `(- ,(deriv (cadr exp) var))) ((eq? (car exp) ‘+) `(+ ,(deriv (cadr exp) var) ,(deriv (caddr exp) var))) ((eq? (car Continue reading [\u6570\u5f0f\u51e6\u7406][Scheme] \u5fae\u5206\u3059\u308b<\/span>→<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[236,272,271],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/posts\/772"}],"collection":[{"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/comments?post=772"}],"version-history":[{"count":12,"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/posts\/772\/revisions"}],"predecessor-version":[{"id":778,"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/posts\/772\/revisions\/778"}],"wp:attachment":[{"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/media?parent=772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/categories?post=772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.bugyo.tk\/b-log\/wp-json\/wp\/v2\/tags?post=772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}