{"id":912,"date":"2020-02-29T13:28:50","date_gmt":"2020-02-29T04:28:50","guid":{"rendered":"https:\/\/dalomo.net\/blog\/?p=912"},"modified":"2020-02-29T20:23:40","modified_gmt":"2020-02-29T11:23:40","slug":"%e3%82%b8%e3%83%a7%e3%82%a4%e3%82%b9%e3%83%86%e3%82%a3%e3%83%83%e3%82%af%e3%83%9e%e3%82%a6%e3%82%b9%e3%81%ae%e3%82%ab%e3%83%bc%e3%82%bd%e3%83%ab%e3%82%92%e6%bb%91%e3%82%89%e3%81%8b%e3%81%ab%e5%8b%95","status":"publish","type":"post","link":"https:\/\/dalomo.net\/blog\/2020\/02\/29\/912\/","title":{"rendered":"\u30b8\u30e7\u30a4\u30b9\u30c6\u30a3\u30c3\u30af\u30de\u30a6\u30b9\u306e\u30ab\u30fc\u30bd\u30eb\u3092\u6ed1\u3089\u304b\u306b\u52d5\u304b\u3057\u305f\u3044"},"content":{"rendered":"

\u30b8\u30e7\u30a4\u30b9\u30c6\u30a3\u30c3\u30af\u30de\u30a6\u30b9<\/h1>\n

\u6ed1\u3089\u304b\u306b\u3057\u305f\u3044\u3002\u3057\u305f\u3044\u306e\u3067\u8abf\u3079\u305f\u3053\u3068\u3092\u66f8\u3044\u3066\u304f\u3002<\/p>\n

\u30b8\u30e7\u30a4\u30b9\u30c6\u30a3\u30c3\u30af\u306e\u50be\u304d<\/h2>\n

\"\"<\/a><\/p>\n

\u5de6\u304b\u3089\u9759\u6b62\u72b6\u614b\u3001X\u8ef8\u304c0\u306b\u5909\u308f\u308b\u30ae\u30ea\u30ae\u30ea\u306e\u4f4d\u7f6e\u3001\u6b62\u307e\u308b\u307e\u3067\u76ee\u4e00\u676f\u52d5\u304b\u3057\u305f\u6642\u306e\u4f4d\u7f6e\u3002\u610f\u8b58\u7684\u306b\u306f\u53f3\u306e\u4f4d\u7f6e\u30670\u306b\u5909\u308f\u3063\u3066\u308b\u3088\u3046\u306b\u601d\u3046\u3051\u3069\u3001\u5b9f\u969b\u306f\u771f\u3093\u4e2d\u306e\u4f4d\u7f6e\u30670\u306b\u306a\u308b\u300222\u00b0\u3050\u3089\u3044\u30670\u3001\u3067\u308239\u00b0\u3050\u3089\u3044\u307e\u3067\u306f\u52d5\u304f\u3002\u3053\u306e\u5dee\u304c\u7406\u60f3\u3068\u73fe\u5b9f\u306e\u5dee\u3092\u751f\u3093\u3067\u308b\u3088\u3046\u306b\u601d\u3046\u3002\u30b9\u30c8\u30c3\u30d1\u30fc\u3092\u3064\u3051\u308b\u3068\u304b\u3001\u5024\u3092\u4f38\u5f35\u3059\u308b\u3068\u304b?\u30b9\u30c8\u30c3\u30d1\u30fc\u306f3D\u30d7\u30ea\u30f3\u30bf\u3068\u304b\u4f7f\u308f\u306a\u3044\u3068\u3060\u3057\u3001\u5024\u306f\u4f38\u9577\u3057\u305f\u3068\u3053\u308d\u306722\u00b0\u30fc39\u00b0\u9593\u306f\u5024\u304c\u52d5\u304b\u306a\u304f\u306a\u308b\u306e\u3067\u610f\u5473\u7121\u3044\u6c17\u3082\u3059\u308b\u3002<\/p>\n

\u30b8\u30e7\u30a4\u30b9\u30c6\u30a3\u30c3\u30af\u306e\u53ef\u5909\u62b5\u6297\u306e\u7279\u6027<\/h2>\n

https:\/\/www.marutsu.co.jp\/contents\/shop\/marutsu\/mame\/78.html<\/a><\/p>\n

\u53ef\u5909\u62b5\u6297\u306b\u306f\u7279\u6027\u304c\u3042\u308b\u305d\u3046\u3067\u3001ABC\u30ab\u30fc\u30d6\u306e\u9055\u3044\u304c\u3042\u308b\u307f\u305f\u3044\u3002\u3058\u3083\u3042\u3053\u306e\u30b9\u30c6\u30a3\u30c3\u30af\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u53ef\u5909\u62b5\u6297\u306e\u7279\u6027\u306f\u306a\u3093\u3058\u3083\u3089\u307b\u3044\u3068\u601d\u3063\u305f\u3051\u3069\u3001\u8abf\u3079\u308b\u3068\u3057\u305f\u3089\u5206\u89e3\u3057\u3066\u62b5\u6297\u3092\u8abf\u3079\u308b\u304b\u3001\u89d2\u5ea6\u3054\u3068\u306b\u5024\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u53d6\u3063\u3066\u30ab\u30fc\u30d6\u306e\u8fd1\u4f3c\u3092\u6c42\u3081\u308b\u3068\u304b\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3068\u601d\u3046\u306e\u3067\u3059\u304c\u3001\u6b63\u76f4\u3067\u304d\u308b\u6c17\u304c\u3057\u306a\u3044\u3057\u6c17\u304c\u5f15\u3051\u308b\u306e\u3067\u3084\u308a\u305f\u304f\u306a\u3044\u3002\u3053\u3053\u306fB\u30ab\u30fc\u30d6\u3067\u3042\u308b\u3068\u306e\u524d\u63d0\u306e\u3082\u3068\u306b\u52d5\u3044\u3066\u306f\u3069\u3046\u304b\u3002\u3069\u3046\u306a\u3093\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n

C++\u306eint-long\u578b\u306e\u7aef\u6570\u51e6\u7406<\/h2>\n

map()\u5185\u90e8\u3067\u9664\u7b97\u304c\u3042\u308a\u3001analogRead()\u306fint\u578b\u3067\u3001map()\u306flong\u578b\u306a\u306e\u3067\u3069\u3061\u3089\u3082\u6574\u6570\u578b\u3060\u304b\u3089\u7aef\u6570\u304c\u51fa\u305f\u3068\u304d\u306e\u4e38\u3081\u65b9\u3067\u6570\u5024\u304c\u305a\u308c\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u3068\u601d\u3063\u305f\u3002\u5b9f\u9a13\u3057\u3066\u307f\u308b\u3002<\/p>\n

void setup() {\r\n  Serial.begin(9600);\r\n  delay(1000);\r\n  for (int i = 0 ; i <= 1023; i++) {\r\n    Serial.print(map(i, 0, 1023, -3, 3));\r\n    Serial.println();\r\n  }\r\n}\r\n\r\nvoid loop() {\r\n}<\/code><\/pre>\n
\u3053\u3093\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u307e\u3057\u3066\u30fc\u3001\u51fa\u3066\u304d\u305f\u6570\u5b57\u3092\u30a8\u30af\u30bb\u30eb\u3055\u3093\u3067\u8a08\u7b97\u3057\u305f\u7d50\u679c\u3068\u6bd4\u8f03\u3057\u3066\u307f\u308b\u3002\u9577\u3044\u306e\u3067\u5909\u5316\u3057\u305f\u90e8\u5206\u3060\u3051\u3002<\/p>\n
-3\u2266out\u22663\u306e\u5834\u5408<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
raw<\/td>\nmap
\n(excel)<\/td>\n		map
\n(arduino)<\/td>\n		roundup
\n(excel)<\/td>\n		rounddown
\n(excel)<\/td>\n<\/tr>\n
0<\/td>\n-3<\/td>\n-3<\/td>\n-3<\/td>\n-3<\/td>\n<\/tr>\n
1<\/td>\n-2.994134897<\/td>\n-3<\/td>\n-3<\/td>\n-2<\/td>\n<\/tr>\n
2<\/td>\n-2.988269795<\/td>\n-3<\/td>\n-3<\/td>\n-2<\/td>\n<\/tr>\n
169<\/td>\n-2.008797654<\/td>\n-3<\/td>\n-3<\/td>\n-2<\/td>\n<\/tr>\n
170<\/td>\n-2.002932551<\/td>\n-3<\/td>\n-3<\/td>\n-2<\/td>\n<\/tr>\n
171<\/td>\n-1.997067449<\/td>\n-2<\/td>\n-2<\/td>\n-1<\/td>\n<\/tr>\n
172<\/td>\n-1.991202346<\/td>\n-2<\/td>\n-2<\/td>\n-1<\/td>\n<\/tr>\n
339<\/td>\n-1.011730205<\/td>\n-2<\/td>\n-2<\/td>\n-1<\/td>\n<\/tr>\n
340<\/td>\n-1.005865103<\/td>\n-2<\/td>\n-2<\/td>\n-1<\/td>\n<\/tr>\n
341<\/td>\n-1<\/td>\n-1<\/td>\n-1<\/td>\n-1<\/td>\n<\/tr>\n
342<\/td>\n-0.994134897<\/td>\n-1<\/td>\n-1<\/td>\n0<\/td>\n<\/tr>\n
343<\/td>\n-0.988269795<\/td>\n-1<\/td>\n-1<\/td>\n0<\/td>\n<\/tr>\n
510<\/td>\n-0.008797654<\/td>\n-1<\/td>\n-1<\/td>\n0<\/td>\n<\/tr>\n
511<\/td>\n-0.002932551<\/td>\n-1<\/td>\n-1<\/td>\n0<\/td>\n<\/tr>\n
512<\/td>\n0.002932551<\/td>\n0<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n
513<\/td>\n0.008797654<\/td>\n0<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n
680<\/td>\n0.988269795<\/td>\n0<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n
681<\/td>\n0.994134897<\/td>\n0<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n
682<\/td>\n1<\/td>\n1<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n
683<\/td>\n1.005865103<\/td>\n1<\/td>\n2<\/td>\n1<\/td>\n<\/tr>\n
684<\/td>\n1.011730205<\/td>\n1<\/td>\n2<\/td>\n1<\/td>\n<\/tr>\n
851<\/td>\n1.991202346<\/td>\n1<\/td>\n2<\/td>\n1<\/td>\n<\/tr>\n
852<\/td>\n1.997067449<\/td>\n1<\/td>\n2<\/td>\n1<\/td>\n<\/tr>\n
853<\/td>\n2.002932551<\/td>\n2<\/td>\n3<\/td>\n2<\/td>\n<\/tr>\n
854<\/td>\n2.008797654<\/td>\n2<\/td>\n3<\/td>\n2<\/td>\n<\/tr>\n
1021<\/td>\n2.988269795<\/td>\n2<\/td>\n3<\/td>\n2<\/td>\n<\/tr>\n
1022<\/td>\n2.994134897<\/td>\n2<\/td>\n3<\/td>\n2<\/td>\n<\/tr>\n
1023<\/td>\n3<\/td>\n3<\/td>\n3<\/td>\n3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\"\"<\/a><\/p>\n
-12\u2266out\u226612\u306e\u5834\u5408<\/h3>\n
\u30b0\u30e9\u30d5\u306e\u5f15\u7528\u306f\u4e0a\u3068\u540c\u3058\u3068\u3053\u3060\u3051\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
raw<\/td>\nmap
\n(excel)<\/td>\n		map
\n(arduino)<\/td>\n		roundup
\n(excel)<\/td>\n		rounddown
\n(excel)<\/td>\n<\/tr>\n
0<\/td>\n-12<\/td>\n-12<\/td>\n-12<\/td>\n-12<\/td>\n<\/tr>\n
1<\/td>\n-11.97653959<\/td>\n-12<\/td>\n-12<\/td>\n-11<\/td>\n<\/tr>\n
2<\/td>\n-11.95307918<\/td>\n-12<\/td>\n-12<\/td>\n-11<\/td>\n<\/tr>\n
169<\/td>\n-8.035190616<\/td>\n-9<\/td>\n-9<\/td>\n-8<\/td>\n<\/tr>\n
170<\/td>\n-8.011730205<\/td>\n-9<\/td>\n-9<\/td>\n-8<\/td>\n<\/tr>\n
171<\/td>\n-7.988269795<\/td>\n-8<\/td>\n-8<\/td>\n-7<\/td>\n<\/tr>\n
172<\/td>\n-7.964809384<\/td>\n-8<\/td>\n-8<\/td>\n-7<\/td>\n<\/tr>\n
339<\/td>\n-4.046920821<\/td>\n-5<\/td>\n-5<\/td>\n-4<\/td>\n<\/tr>\n
340<\/td>\n-4.023460411<\/td>\n-5<\/td>\n-5<\/td>\n-4<\/td>\n<\/tr>\n
341<\/td>\n-4<\/td>\n-4<\/td>\n-4<\/td>\n-4<\/td>\n<\/tr>\n
342<\/td>\n-3.976539589<\/td>\n-4<\/td>\n-4<\/td>\n-3<\/td>\n<\/tr>\n
343<\/td>\n-3.953079179<\/td>\n-4<\/td>\n-4<\/td>\n-3<\/td>\n<\/tr>\n
510<\/td>\n-0.035190616<\/td>\n-1<\/td>\n-1<\/td>\n0<\/td>\n<\/tr>\n
511<\/td>\n-0.011730205<\/td>\n-1<\/td>\n-1<\/td>\n0<\/td>\n<\/tr>\n
512<\/td>\n0.011730205<\/td>\n0<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n
513<\/td>\n0.035190616<\/td>\n0<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n
680<\/td>\n3.953079179<\/td>\n3<\/td>\n4<\/td>\n3<\/td>\n<\/tr>\n
681<\/td>\n3.976539589<\/td>\n3<\/td>\n4<\/td>\n3<\/td>\n<\/tr>\n
682<\/td>\n4<\/td>\n4<\/td>\n4<\/td>\n4<\/td>\n<\/tr>\n
683<\/td>\n4.023460411<\/td>\n4<\/td>\n5<\/td>\n4<\/td>\n<\/tr>\n
684<\/td>\n4.046920821<\/td>\n4<\/td>\n5<\/td>\n4<\/td>\n<\/tr>\n
851<\/td>\n7.964809384<\/td>\n7<\/td>\n8<\/td>\n7<\/td>\n<\/tr>\n
852<\/td>\n7.988269795<\/td>\n7<\/td>\n8<\/td>\n7<\/td>\n<\/tr>\n
853<\/td>\n8.011730205<\/td>\n8<\/td>\n9<\/td>\n8<\/td>\n<\/tr>\n
854<\/td>\n8.035190616<\/td>\n8<\/td>\n9<\/td>\n8<\/td>\n<\/tr>\n
1021<\/td>\n11.95307918<\/td>\n11<\/td>\n12<\/td>\n11<\/td>\n<\/tr>\n
1022<\/td>\n11.97653959<\/td>\n11<\/td>\n12<\/td>\n11<\/td>\n<\/tr>\n
1023<\/td>\n12<\/td>\n12<\/td>\n12<\/td>\n12<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\"\"<\/a><\/p>\n
\u3046\u30fc\u3093\u3002\u30a8\u30af\u30bb\u30eb\u3082\u7656\u304c\u3042\u3063\u3066\u3001\u306f\u3063\u304d\u308a\u3068\u306f\u8a00\u3048\u306a\u3044\u3051\u3069\u3002\u8ca0\u306e\u6570\u306e\u5834\u5408\u3001\u30a8\u30af\u30bb\u30eb\u3067\u3044\u3046ROUNDUP\u3067\u6b63\u306e\u6570\u3060\u3068ROUNDDOWN\u3068\u4e00\u81f4\u3059\u308b\u3002\u305f\u3060\u3001Arduino\u306e\u65b9\u304c\u304d\u308c\u3044\u306b\u968e\u6bb5\u72b6\u306b\u306a\u3063\u3066\u3044\u3066\u3001\u3053\u308c\u306f\u30a8\u30af\u30bb\u30eb\u304c\u30a2\u30ec\u306a\u306e\u304b\u306a?\u3067\u3082\u307e\u3041\u3001510-513\u3042\u305f\u308a\u3092\u898b\u308b\u3068\u307b\u3093\u306e\u5c11\u3057\u3060\u3051\u3069\u3001Arduino\u306emap()\u306f\u6b63\u5074\u306b\u5024\u304c\u632f\u308c\u3066\u3044\u308b\u3088\u3046\u306a\u6c17\u304c\u3059\u308b\u3002\u611f\u899a\u7684\u306b\u306f\u3001ROUNDDOWN\u304c\u8fd1\u3044\u304b\u306a\u3041\u3068\u601d\u3063\u305f\u3002map()\u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u306b\u306f<\/p>\n
The\u00a0map()<\/code>\u00a0function uses integer math so will not generate fractions, when the math might indicate that it should do so. Fractional remainders are truncated, and are not rounded or averaged.<\/p>\n
Notes & Warnings<\/h3>\n
\n
As previously mentioned, the map() function uses integer math. So fractions might get suppressed due to this. For example, fractions like 3\/2, 4\/3, 5\/4 will all be returned as 1 from the map() function, despite their different actual values. So if your project requires precise calculations (e.g. voltage accurate to 3 decimal places), please consider avoiding map() and implementing the calculations manually in your code yourself.<\/p>\n<\/div>\n<\/blockquote>\n
\u3066\u3044\u3046\u3053\u3068\u306a\u306e\u3067\u3001\u81ea\u5206\u3067\u3084\u308c\u3063\u3066\u3053\u3068\u304b\u3041\u3002\u3046\u30fc\u3093\u3046\u30fc\u3093\u3002<\/p>\n
\u76f4\u7dda\u306e\u30b0\u30e9\u30d5\u3092\u66f2\u7dda\u306b\u5909\u63db<\/h2>\n
\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u96fb\u5727\u304b\u3089AnalogRead()\u3067\u6570\u5024\u3092\u53d6\u5f97\u3059\u308b\u3068\u3053\u308d\u306e\u7279\u6027\u306f\u5206\u304b\u3089\u306a\u3044\u3082\u306e\u306e\u3001\u53d6\u5f97\u3057\u305f\u6570\u5024\u306f0-1023\u3067\u5909\u5316\u3059\u308b\u76f4\u7dda\u306e\u30b0\u30e9\u30d5\u306b\u306a\u308b\u3002\u3067\u3001\u7b49\u901f\u76f4\u7dda\u904b\u52d5\u3063\u3066\u3044\u3046\u306e\u306f\u4eba\u9593\u306e\u611f\u899a\u3068\u5408\u3063\u3066\u306a\u3044\u3089\u3057\u3044\u3002<\/p>\n
https:\/\/www.autoexe.co.jp\/kijima\/column8.html<\/a><\/p>\n
\u6700\u521d\u306f\u5f90\u3005\u306b\u901f\u5ea6\u304c\u4e0a\u304c\u3063\u3066\u3044\u3063\u3066\u3001\u6642\u9593\u304c\u7d4c\u3064\u3068\u901f\u5ea6\u306e\u4e0a\u304c\u308a\u65b9\u304c\u6025\u306b\u306a\u308b\u3001\u307f\u305f\u3044\u306a\u3002\u305d\u3046\u3044\u3046\u306e\u304c\u4eba\u9593\u306e\u611f\u899a\u306b\u5408\u3063\u3066\u308b\u307f\u305f\u3044\u3002\u3060\u304b\u3089\u30010-1023\u306e\u5024\u3092\u305d\u3046\u3044\u3046\u611f\u3058\u306b\u5909\u5316\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308c\u3070\u6ed1\u3089\u304b\u611f\u3092\u5f97\u3089\u308c\u308b\u306e\u3067\u306f\u3068\u601d\u3063\u305f\u3002\u3067\u3001\u305d\u3046\u3044\u3046\u5909\u63db\u3001\u76f4\u7dda\u306e\u30b0\u30e9\u30d5\u306b\u30ab\u30fc\u30d6\u3092\u304b\u3051\u308b\u3088\u3046\u306a\u5909\u63db\u306f\u3069\u3046\u3044\u3046\u306e\u304c\u3042\u308b\u3093\u3060\u308d\u3046\u3068\u8abf\u3079\u3066\u307f\u305f\u3002\u30a4\u30e1\u30fc\u30b8\u3068\u3057\u3066\u306f<\/p>\n
\"\"<\/a><\/p>\n
\u3053\u3046\u3044\u3046\u611f\u3058\u3002\u8003\u3048\u65b9\u5408\u3063\u3066\u3093\u306e\u304b\u4e0d\u5b89\u306b\u306a\u3063\u3066\u304d\u305f\u3002\u3069\u3046\u306a\u3093\u3060\u308d\u3002<\/p>\n
y=x^3<\/h3>\n
\"\"<\/a><\/p>\n
https:\/\/www.wolframalpha.com\/input\/?i=y%3Dx%5E3&lang=ja<\/a><\/p>\n
x^3\u306e\u30b0\u30e9\u30d5\u304c\u305d\u308c\u3063\u307d\u3044\u3002\u3068\u308a\u3042\u3048\u305a\u30a8\u30af\u30bb\u30eb\u30670-1023\u306b\u5408\u3046\u3088\u3046\u306b\u8a66\u3057\u3066\u307f\u308b\u3002<\/p>\n
    \n
  1. 0-1023\u3092\u3001-1\u304b\u30891\u306b\u5909\u63db\u3059\u308b\u3002\n