{"id":1264,"date":"2011-04-28T16:30:22","date_gmt":"2011-04-28T08:30:22","guid":{"rendered":"http:\/\/www.ccttours.com\/blog\/?p=1264"},"modified":"2011-04-28T16:36:55","modified_gmt":"2011-04-28T08:36:55","slug":"sc%ef%bc%9a%e6%9b%b4%e9%9a%8f%e6%9c%ba%e7%9a%84%e6%95%b0%e5%ad%97","status":"publish","type":"post","link":"https:\/\/learn.travelchinawith.me\/?p=1264","title":{"rendered":"SC\uff1a\u66f4\u968f\u673a\u7684\u6570\u5b57"},"content":{"rendered":"

\u5728\u8fd9\u4e00\u8282\uff0c\u6211\u4eec\u5c06\u8c08\u8c08\u4e0d\u540c\u7c7b\u578b\u7684\u968f\u673a\u8fdb\u7a0b\u3002\u5e76\u4e0d\u4f1a\u6709\u5f88\u591a\u4eba\u53bb\u5199\u7eaf\u7684\u968f\u673a\u97f3\u4e50\uff08\u5c3d\u7ba1\u770b\u8d77\u6765\u50cf\u662f\uff09\u3002\u603b\u4e4b\u8fd9\u4e0d\u662f\u975e\u5e38\u6709\u8da3\u7684\u3002\u901a\u5e38\u4f1a\u6709\u4e00\u4e9b\u8fc7\u6ee4\u3001\u503e\u659c\uff08skew\uff09\u6216\u503e\u5411\uff08bias\uff09\u3002\u5373\u4f7f\u770b\u8d77\u6765\u9009\u62e9\u7684\u9762\u5f88\u5bbd\uff0c\u6240\u6709\u53ef\u88ab\u542c\u5230\u7684\u9891\u7387\uff0830Hz\uff5e20000Hz\uff09\uff0c\u5bf9\u4e8e\u90a3\u4e9b\u9891\u7387\u90fd\u6709\u4e00\u4e2a\u503e\u5411\u3002\u5728\u4e4b\u524d\u7684\u201c\u968f\u673a\u201d\u97f3\u4e50\u8303\u4f8b\u4e2d\uff0c\u6211\u4eec\u503e\u5411\u4e8e\u4e00\u4e2aMIDI\u503c\u7684\u8303\u56f4\uff08\u800c\u4e0d\u662f\u8fde\u7eed\u7684\u9891\u7387\uff09\uff0c\u53ef\u80fd\u7684\u6301\u7eed\u65f6\u95f4\u7684\u8303\u56f4\uff0c\u7b49\u7b49\u3002\u5373\u4f7f\u51ef\u5947\uff08John Cage\uff09\u7684\u4f5c\u54c1\u5e38\u88ab\u8ba4\u4e3a\u662f\u968f\u673a\u7684\uff0c\u4f46\u4ed6\u4eec\u4ecd\u7531\u503e\u5411\u5851\u9020\u30024’33″\u4fbf\u5177\u6709\u4e00\u4e2a\u5f3a\u70c8\u7684\u503e\u5411\uff1a\u6ca1\u6709\u6765\u81ea\u4e8e\u94a2\u7434\u7684\u97f3\u7b26\u3002
\n<\/p>\n

\u968f\u673a\u662f\u4ec0\u4e48\uff1f\u4e00\u81f4\u662f\u4ec0\u4e48\uff1f\u8bbe\u60f3\u4e00\u4e2a\u4ece\u5b8c\u5168\u4e00\u81f4\u8d70\u5411\u5f7b\u5e95\u968f\u673a\u7684\u97f3\u9636\u3002\u4e24\u8005\u6700\u540e\u4f1a\u662f\u4ec0\u4e48\uff1f\u5728\u6570\u5b57\u97f3\u9891\u65b9\u9762\uff0c\u4e00\u4e2a\u58f0\u97f3\u7531\u4e00\u4e2a16\u6bd4\u7279\u7684\u6570\u5b57\u8868\u8ff0\uff0c\u5f7b\u5e95\u968f\u673a\u610f\u5473\u7740\u4e00\u4e2a\u5728\u4e00\u4e2a\u65b0\u91c7\u6837\u751f\u6210\u540c\u65f6\u572816\u6bd4\u7279\u8303\u56f4\u5185\u6570\u5b57\u9009\u53d6\u7684\u5e73\u7b49\u673a\u4f1a\u3002\u8fd9\u6837\u7684\u4e00\u4e2a\u7cfb\u7edf\u5c06\u751f\u6210\u566a\u97f3\u3002\u5f7b\u5e95\u7684\u4e00\u81f4\u6211\u731c\u5c06\u4f1a\u5168\u90e8\u662f0\u3002<\/p>\n

\u6211\u559c\u6b22\u53bb\u601d\u8003\u968f\u673a\u7684\u7a0b\u5ea6\u3002\u97e6\u4f2f\u542c\u4e0a\u53bb\u6bd4\u83ab\u624e\u7279\u66f4\u968f\u673a\u3002\u6211\u7684\u610f\u601d\u662f\u97e6\u4f2f\u7684\u6a21\u5f0f\u66f4\u96be\u8fa8\u8bc6\u3002\u6211\u4eec\u5728\u97f3\u4e50\u4f53\u9a8c\u4e2d\u5bfb\u627e\u7684\uff0c\u662f\u76f8\u4f3c\u70b9\u4e0e\u591a\u6837\u5316\u95f4\u90a3\u4e2a\u8212\u9002\u7684\u5e73\u8861\u70b9\u3002\u8fd9\u968f\u4eba\u3001\u5fc3\u60c5\u6216\u73af\u5883\uff08\u6bd4\u5982\uff0c\u97f3\u4e50\u5385VS\u5f71\u9662\uff08\u5728\u8fd9\u91cc\u4f3c\u4e4e\u66f4\u6709\u8010\u53d7\u529b\uff09\uff09\u7684\u4e0d\u540c\u800c\u4e0d\u540c\u3002\u6709\u4e24\u79cd\u63a5\u8fd1\u8fd9\u4e2a\u5e73\u8861\u70b9\u7684\u65b9\u5f0f\u3002\u4e00\u662f\u589e\u52a0\u590d\u6742\u7684\u7a0b\u5ea6\uff08\u50cf\u5728\u52a0\u6cd5\u5408\u6210\u4e2d\u505a\u7684\u90a3\u6837\uff09\uff0c\u53e6\u4e00\u4e2a\u662f\u8fc7\u6ee4\u590d\u6742\u7684\u7a0b\u5e8f\uff08\u50cf\u5728\u51cf\u6cd5\u5408\u6210\u4e2d\u90a3\u6837\uff09\u3002\u5728\u672c\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u505a\u8fc7\u6ee4\u3002 <\/p>\n

\u503e\u5411\u6027\u968f\u673a\u9009\u53d6<\/h3>\n

\u503e\u5411\u6027\u968f\u673a\u9009\u53d6\u9650\u5236\u6216\u6ee4\u9664\u4e86\u4e00\u7cfb\u5217\u5bbd\u6cdb\u53ef\u80fd\u51fa\u73b0\u7684\u7ed3\u679c\u3002\u6211\u4eec\u89c1\u8fc7\u5b83\u591a\u6b21\uff0c\u6bd4\u5982\u968f\u673a\u8303\u56f4\uff1arrand(60,72)\u3002\u53e6\u4e00\u4e2a\u65b9\u6cd5\u662f\u52a0\u91cd\uff08weight\uff09\u4e00\u4e2a\u503c\u6216\u4e00\u7ec4\u503c\u51fa\u73b0\u7684\u53ef\u80fd\u6027\u3002\u5728\u8fd9\u4e9b\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u53ef\u80fd\u6027\u7684\u6bd4\u91cd\u88ab\u8868\u8ff0\u4e3a0\uff5e1\u4e4b\u95f4\u7684\u503c\uff0c\u5728\u8fd9\u91cc\u6240\u6709\u53ef\u80fd\u6027\u6700\u591a\u52a0\u52301\u3002\u5728\u4e0a\u8fb9\u90a3\u4e2a\u968f\u673a\u7684\u4f8b\u5b50\u4e2d\uff0c\u4efb\u4f55\u572860\uff5e71\u4e4b\u95f4\u7684\u503c\u90fd\u6709\u5e73\u7b49\u7684\u53ef\u80fd\u6027\u88ab\u9009\u4e2d\uff0c\u56e0\u6b64\u6bcf\u4e2a\u72ec\u7acb\u503c\u67091\/12\u62160.08333\u7684\u673a\u4f1a\u88ab\u9009\u4e2d\u3002<\/p>\n

\"\u5e73\u5747\u5206\u5e03\u7684\u53ef\u80fd\u6027\u56fe\u8868\"<\/a>
\u5e73\u5747\u5206\u5e03\u7684\u53ef\u80fd\u6027\u56fe\u8868<\/figcaption><\/figure>\n

\u540c\u6837\u7684\uff0c\u5728[60, 65, 69, 54].choose<\/em>\u4e2d\uff0c\u6bcf\u4e2a\u503c\u90fd\u67090.25\u7684\u673a\u4f1a\u88ab\u9009\u4e2d\u3002\u56e0\u4e3a\u53ea\u5b58\u5728\u56db\u4e2a\u503c(0.25*4=1.0)\u3002<\/p>\n

\u4e00\u4e2a\u60f3\u5411\u5355\u4e00\u503c\u503e\u659c\u7684\u65b9\u5f0f\u662f\u91cd\u590d\u9009\u62e9\uff1a <\/p>\n

24.1. \u8001\u5343\u9ab0\u5b50<\/strong> <\/p>\n

[60, 60, 65, 69, 54].choose<\/pre>\n
\uff08\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u4e0a\u4f8b60\u51fa\u73b0\u7684\u673a\u4f1a\u4f1a\u6bd4\u8f83\u9ad8\u5c31\u4e0d\u7528\u8bf4\u4e86\u5427\u3002\uff09 <\/p>\n
\u572810.0.rand\u7684\u60c5\u51b5\u4e0b\uff0c\u9009\u62e9\u5e76\u975e\u79bb\u6563\u7684\u6574\u6570\uff0c\u4f46\u5374\u662f\u53ef\u80fd\u7684\u6d6e\u70b9\u503c\u3002\u5c55\u793a\u8fd9\u4e9b\u673a\u7387\u7684\u56fe\u8868\u5e94\u662f\u6a2a\u8de8\u9876\u90e8\u7684\u4e00\u6761\u76f4\u7ebf\uff0c\u8868\u660e\u6bcf\u4e2a\u4f4e\u503c\uff080.0\uff09\u5230\u9ad8\u503c\uff0810.0\uff09\u95f4\u7684\u6570\u7ec4\u90fd\u6709\u88ab\u5e73\u5747\u9009\u53d6\u7684\u673a\u4f1a\u3002<\/p>\n
\"\u4e00\u5207\u7686\u6709\u53ef\u80fd\u7684\u53ef\u80fd\u6027\u56fe\u8868\u5206\u5e03\"<\/a>
\u4e00\u5207\u7686\u6709\u53ef\u80fd\u7684\u53ef\u80fd\u6027\u56fe\u8868\u5206\u5e03<\/figcaption><\/figure>\n
\u5bf9\u8fd9\u4e2a\u6a21\u578b\u505a\u6709\u503e\u5411\u7684\u8f93\u51fa\u9700\u8981\u4e00\u70b9\u6570\u5b66\u77e5\u8bc6\u3002<\/p>\n
\u5173\u4e8e\u968f\u673a\u503e\u5411\uff0c\u8fd9\u91cc\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u4f8b\u5b50\u3002\u4e09\u4e2a\u4eba\u4e3a\u5f97\u5230\u6700\u5927\u7684\u6570\u5b57\u8f6c\u4e00\u4e2a\u8f6c\u76d8\u3002\u5982\u679c\u4f60\u8f6c\u5230\u5c0f\u7684\u6570\u5b57\u90a3\u4e48\u5c31\u7ee7\u7eed\u8f6c\u3002\u7ed3\u679c\u503e\u5411\u4e8e\u8f83\u5927\u7684\u6570\u5b57\uff0c\u56e0\u4e3a\u6570\u5b57\u6700\u5927\u4ee3\u8868\u83b7\u80dc\u3002 <\/p>\n
\u5c06\u8fd9\u4e2a\u8fc7\u7a0b\u7528\u4e00\u5bf9\u9ab0\u5b50\u5c55\u793a\uff1a\u4e24\u9897\u9ab0\u5b50\u4e00\u8d77\u6447\uff0c\u4f46\u53d6\u4e24\u4e2a\u6570\u5b57\u91cc\u6700\u5927\u7684\u90a3\u4e2a\u3002\u53ef\u80fd\u7684\u7ec4\u5408\u65b9\u5f0f\u6709\uff1a
\n[ 1, 1 ] [ 1, 2 ] [ 1, 3 ] [ 1, 4 ] [ 1, 5 ] [ 1, 6 ]
\n[ 2, 1 ] [ 2, 2 ] [ 2, 3 ] [ 2, 4 ] [ 2, 5 ] [ 2, 6 ]
\n[ 3, 1 ] [ 3, 2 ] [ 3, 3 ] [ 3, 4 ] [ 3, 5 ] [ 3, 6 ]
\n[ 4, 1 ] [ 4, 2 ] [ 4, 3 ] [ 4, 4 ] [ 4, 5 ] [ 4, 6 ]
\n[ 5, 1 ] [ 5, 2 ] [ 5, 3 ] [ 5, 4 ] [ 5, 5 ] [ 5, 6 ]
\n[ 6, 1 ] [ 6, 2 ] [ 6, 3 ] [ 6, 4 ] [ 6, 5 ] [ 6, 6 ]<\/code> <\/p>\n
\u672c\u4f8b\u53ef\u4ee5\u7528\u8fd9\u884c\u4ee3\u7801\u751f\u6210\uff1a6.do({arg i;6.do({arg j; [i + 1, j + 1].post}); “”.postln;})<\/em> <\/p>\n
\u6bcf\u5bf9\u542b6\u7684\u7ec4\u5408\u5c06\u8fd4\u56de6\u3002\u4f46\u4ec5\u6709\u4e00\u5bf9\u4f1a\u8fd4\u56de1\uff1a[1, 1]\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002<\/p>\n
\".\"<\/a>
.<\/figcaption><\/figure>\n
\u670911\u79cd\u7ec4\u5408\u7684\u7ed3\u679c\u662f6\uff0811\/36=0.3\uff09\uff0c9\u79cd\u7ec4\u5408\u7684\u7ed3\u679c\u662f5\uff080.25\uff09\uff0c7\u79cd4\uff080.19\uff09\uff0c3\u79cd2\uff080.08\uff09\uff0c\u7136\u540e\u4ec51\u79cd1\uff080.03\uff09\u3002\u4e0b\u8fb9\u662f\u8fd9\u4e9b\u503c\u7684\u53ef\u80fd\u6027\u5206\u5e03\u56fe\u8868\u3002<\/p>\n
\"\u53ef\u80fd\u6027\u5206\u5e03\u56fe\u8868\"<\/a>
\u53ef\u80fd\u6027\u5206\u5e03\u56fe\u8868<\/figcaption><\/figure>\n
\u7528100\u9762\u7684\u9ab0\u5b50\u5c06\u7ed9\u51fa\u66f4\u591a\u7684\u6570\u5b57\uff0c\u4f46\u8d8b\u52bf\u5c06\u662f\u5b8c\u5168\u76f8\u540c\u7684\u3002100\u548c\u5176\u4ed6\u4efb\u4f55\u6570\u5c06\u8fd4\u56de100\u3002\u4f46\u4ec5\u67091\u548c1\u7684\u7ec4\u5408\u5c06\u8fd4\u56de1\u3002\u6bcf\u4e2a\u6570\u5b57\u8fd4\u56de\u7ed3\u679c\u603b\u6570\u53ef\u4ee5\u7528\u516c\u5f0fn*2-1\u8ba1\u7b97\u3002\u6bcf\u4e2a\u6570\u5b57\u7684\u53ef\u80fd\u6027\u7531(n*2-1)\/total\u6765\u8ba1\u7b97\u3002total\u662f\u6700\u5927\u7684\u90a3\u4e2a\u503c\u3002 <\/p>\n
24.2. \u9ad8\u503e\u5411\u8ba1\u7b97 <\/strong><\/p>\n
n = 100; n.do({arg i; i = i + 1; ((i*2-1)\/(n.squared)).postln})<\/pre>\n
\u4e0b\u8fb9\u662f\u4e00\u4e2a\u57fa\u4e8e\u201c\u4e24\u8005\u4e2d\u8f83\u5927\u503c\u201d\u503e\u5411\u505a\u768450\u4e2a\u9009\u62e9\u56fe\u8868\u3002\u9009\u62e9\u8d8a\u591a\uff0c\u53ef\u80fd\u6027\u56fe\u8868\u66f2\u7ebf\u8d8a\u5e73\u6ed1\u3002<\/p>\n
\"\u57fa\u4e8e50\u4e2a\u9009\u62e9\u7684\u53ef\u80fd\u6027\u56fe\u8868\"<\/a>
\u57fa\u4e8e50\u4e2a\u9009\u62e9\u7684\u53ef\u80fd\u6027\u56fe\u8868<\/figcaption><\/figure>\n
\u6d6e\u70b9\u6570\u7684\u968f\u673a\u9009\u53d6\u6709\u66f4\u591a\u7684\u53ef\u80fd\u6027\uff08\u5c3d\u7ba1\u4ecd\u662f\u6709\u9650\u7684\uff09\u3002\u8d8b\u52bf\u56fe\u662f\u4e00\u6837\u7684\u3002 <\/p>\n
\u5728SC\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528max\u548cmin\u51fd\u6570\u3002 <\/p>\n
24.3. \u6d6e\u70b9\u503e\u5411<\/strong> <\/p>\n
max(6.0.rand.round(0.01), 6.0.rand.round(0.01));<\/pre>\n
\u4efb\u4f55\u6570\u5b57\u548c6\u5c06\u8fd4\u56de6\uff0c\u4f46\u53ea\u67090\u548c0\u8fd4\u56de0\u3002\u8fd9\u4e2a\u529f\u80fd\u7684\u56fe\u8868\u5c06\u662f\uff1a<\/p>\n
\"\u53ef\u80fd\u6027\u56fe\u8868\"<\/a>
\u53ef\u80fd\u6027\u56fe\u8868<\/figcaption><\/figure>\n
\u8fd9\u6bb5\u4ee3\u7801\u7684\u53ef\u80fd\u6027\u56fe\u8868\u5c06\u662f\u600e\u6837\u7684\uff1f<\/p>\n
24.4. \u503e\u5411<\/strong> <\/p>\n
min(100.0.rand, 100.rand);<\/pre>\n
\u4e00\u4e2a\u6709\u70b9\u70b9\u96be\u7684\u95ee\u9898\uff1a\u8fd9\u6bb5\u4ee3\u7801\u5982\u4f55\u6539\u53d8\u8f93\u51fa\uff08\u6ce8\u610f\u7b2c\u4e8c\u4e2a\u968f\u673a\u9009\u62e9\u4e0d\u662f\u4e00\u4e2a\u8bef\u5199\uff0c\u6211\u4f7f\u7528100.rand\u8868\u660e\u8fd9\u662f\u4e00\u4e2a\u8bc1\u4e66\u9009\u62e9\u800c\u4e0d\u662f\u6d6e\u70b9\uff09\uff1a <\/p>\n
24.5. \u503e\u5411<\/strong> <\/p>\n
max(200.0.rand, 100.0.rand);<\/pre>\n
\u8fd9\u4e2a\u600e\u4e48\u6837\uff08\u53ef\u80fd\u7684\u7ed3\u679c\u662f0\uff5e100\uff0c\u4f46\u95ee\u95ee\u4f60\u81ea\u5df1\u6709\u591a\u5c11\u7ec4\u5408\u7684\u7ed3\u679c\u662f0\uff1f\u591a\u5c11\u79cd\u7ed3\u679c\u662f50\uff1f\u591a\u5c11\u79cd\u662f100\uff1f\uff09\uff1a <\/p>\n
24.6. \u503e\u5411 <\/strong><\/p>\n
(100.rand + 100.rand)\/2<\/pre>\n
\u5982\u4f55\u505a\u4e00\u4e2a\u53cd\u5411\u7684\u4e09\u89d2\uff1f-10\uff5e0\u95f4\u7684\u4e00\u4e2a\u9009\u62e9\uff1f\u4e00\u4e2a\u5bf9\u4e8e-10\u7684\u503e\u5411\uff1f\u57280\uff5e10\u95f4\u503e\u5411\u4e8e7.5\u7684\u9009\u62e9\uff1f\u5982\u4f55\u5c06\u4e00\u4e2a\u9009\u53d6\u673a\u7387\u5206\u914d\u7ed9\u6bcf\u4e2a\u503c\uff0c\u4f7f\u5f9760\u67090.25\u7684\u673a\u7387\u88ab\u9009\u4e0a\uff0c61\u67090.1\u7684\u673a\u7387\uff0c62\u67090.5\uff0c\u7b49\u7b49\uff1f <\/p>\n
\u590d\u6742\u5417\uff1f\u8fc7\u53bb\u66fe\u7ecf\u662f\u3002SC\u6709\u4e00\u5806\u5f88\u597d\u7684\u968f\u673a\u9009\u53d6\u6570\u5b57\u503e\u5411\u51fd\u6570\u3002\u5728\u6211\u4eec\u7740\u773c\u5b83\u4eec\u524d\uff0c\u6211\u8981\u793a\u8303\u4e00\u4e2a\u505a\u6d4b\u8bd5\u7684\u7cfb\u7edf\u3002\u6211\u60ef\u5e38\u4f7f\u7528\u7684\u65b9\u6cd5\u662f\u7533\u660e\u4e00\u4e2a\u80fd\u4fdd\u6301\u8bb0\u5f55\u968f\u673a\u9009\u53d6\u7684\u8ba1\u6570\u6570\u7ec4\uff0c\u7136\u540e\u4f9d\u9009\u62e9\u7684\u51fa\u73b0\u589e\u52a0\u6570\u7ec4\u7684\u4f4d\u7f6e\u3002\u6700\u540e\uff0c\u6211\u4f7f\u7528plot\u4fe1\u606f\uff0c\u5b83\u5c06\u7ed8\u5236\u8fd9\u4e2a\u6570\u7ec4\u7684\u5e73\u9762\u56fe\u3002\u8fd0\u884c\u4e0b\u8fb9\u7b2c\u4e00\u884c\u770b\u7ed3\u679c\u3002 <\/p>\n
24.7. \u6d4b\u8bd5\u503e\u5411<\/strong> <\/p>\n
[0, 1, 0.5, 0.178, 0.9, 0].plot; \/\/ plot\u4e00\u4e2a\u6570\u7ec4 \r\n\r\n( \r\na = Array.fill(100, {0}); \/\/\u75280\u586b\u5145\u4e00\u4e2a\u6570\u7ec4 \r\n1000.do( \/\/\u505a1000\u6b21\u53cd\u590d; \u66f4\u591a\u9009\u62e9, \u66f4\u5e73\u6ed1\u7684\u56fe\u8868 \r\n   { \r\n      b = 1000.rand; \/\/\u4ece0\uff5e999\u95f4\u9009\u53d6\u4e00\u4e2a\u968f\u673a\u6570 \r\n      a.put(b, a.at(b) + 1); \/\/\u5728\u6570\u7ec4\u4e2d\u589e\u52a0\u90a3\u4e2a\u4f4d\u7f6e \r\n   } \r\n); \r\na.plot; \/\/\u5e73\u9762\u753b\u7ed3\u679c. \r\n)<\/pre>\n
\u968f\u673a\u7684\u9009\u62e9\u57280\uff5e999\u95f4\u3002\u8fd9\u4e2a\u6570\u5b57\u88ab\u7528\u505a\u4e00\u4e2a\u53c2\u8003\u7684\u7d22\u5f15\u5e76\u4f7f\u7528put\u589e\u52a0\u6570\u7ec4a\u7684\u4f4d\u7f6e\u3002put\u7684\u7b2c\u4e00\u5f15\u6570\u4e3a\u6570\u7ec4\u7684\u7d22\u5f15\uff0c\u7b2c\u4e8c\u4e2a\u662f\u4f60\u8981\u50a8\u5b58\u7684\u503c\u3002\u5b83\u5728\u7d22\u5f15b\u5904\u6539\u53d8\u503c\uff08\u901a\u8fc7\u589e\u59271(a.at(b)+1)\uff09\u3002\u7528\u8fd9\u4e2a\u65b9\u6cd5\u4fbf\u53ef\u4ee5\u6d4b\u8bd5\u6211\u4eec\u4e0a\u8fb9\u8ba8\u8bba\u7684\u6bcf\u4e2a\u968f\u673a\u8fdb\u7a0b\uff0c\u6216\u5217\u5728\u4e0b\u8fb9\u7684\u51fd\u6570\u3002 <\/p>\n
\u5728\u4e0a\u8fb9\u7684\u4f8b\u5b50\u4e2d\u4f7f\u7528\u67d0\u4e9b\u503e\u5411\u968f\u673a\u9009\u53d6\u4f1a\u8fd4\u56de\u6d6e\u70b9\u6570\u3002\u8fd9\u65f6\uff0c\u5728\u5c06\u5b83\u7528\u4e8e\u6570\u7ec4\u7d22\u5f15\u524d\uff0c\u4f60\u5fc5\u987b\u5c06\u5b83\u8f6c\u5316\u4e3a\u6574\u6570\u3002 <\/p>\n
24.8. \u6d4b\u8bd5\u6d6e\u70b9\u503e\u5411<\/strong> <\/p>\n
( \r\na = Array.fill(100, {0}); \/\/\u75280\u586b\u5145\u6570\u7ec4 \r\n1000.do( \/\/\u505a1000\u6b21\u53cd\u590d \r\n   { \r\n      b = (100.rand + 100.rand)\/2.div(1); \r\n      a.put(b, a.at(b) + 1); \r\n   } \r\n); \r\na.plot; \/\/plot\u7ed3\u679c. \r\n)<\/pre>\n
\u968f\u673a\u51fd\u6570\u53ca\u6d4b\u8bd5\u3002 <\/p>\n
24.9. \u968f\u673a\u6d4b\u8bd5 <\/p>\n
( \r\na = Array.fill(100, {0}); \r\n1000.do({ \r\nb = 100.rand; \/\/ 0 \u548c\u8fd9\u4e2a, rand2 \u751f\u6210\u8d1f\u503c (\u8d1f\u7684\u8fd9\u4e2a\u5230\u8fd9\u4e2a) \r\n   a.put(b, a.at(b) + 1); \r\n}); \r\na.plot; \r\n) \r\n\r\n( \r\na = Array.fill(100, {0}); \r\n1000.do({ \r\nb = 100.linrand; \/\/ \u7ebf\u6027\u5206\u5e03, bilinrand adds - values \r\n   a.put(b, a.at(b) + 1); \r\n}); \r\na.plot; \r\n) \r\n\r\n( \r\na = Array.fill(100, {0}); \r\n1000.do({ \r\nb = rrand(30, 75); \/\/ random range \r\n   a.put(b, a.at(b) + 1); \r\n}); \r\na.plot; \r\n) \r\n\r\n( \r\na = Array.fill(100, {0}); \r\n1000.do({ \r\nb = 100.exprand(1).div(1); \r\n   a.put(b, a.at(b) + 1); \r\n}); \r\na.plot; \r\n) \r\n\r\n( \r\na = Array.fill(100, {0}); \r\n1000.do({ \r\nb = max(100.rand, 100.rand) \r\n   a.put(b, a.at(b) + 1); \r\n}); \r\na.plot; \r\n) \r\n\r\n( \r\na = Array.fill(100, {0}); \r\n1000.do({ \r\nb = max(100.rand, 100.rand, 100.rand); \r\n   a.put(b, a.at(b) + 1); \r\n}); \r\na.plot; \r\n) \r\n\r\n( \r\na = Array.fill(100, {0}); \r\n1000.do({ \r\n\/\/this.coin returns true this percent of the time \r\nb = if(0.2.coin, {max(20.rand, 20.rand)}, {min(80.rand, 80.rand) + 20}); \r\n   a.put(b, a.at(b) + 1); \r\n}); \r\na.plot; \r\n)<\/pre>\n","protected":false},"excerpt":{"rendered":"
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