{"id":46449,"date":"2023-07-18T03:14:43","date_gmt":"2023-07-17T19:14:43","guid":{"rendered":"http:\/\/stmu.1000uc.com\/mu\/?p=46449"},"modified":"2023-07-18T03:14:43","modified_gmt":"2023-07-17T19:14:43","slug":"%e5%a5%87%e8%bf%b9mu-sd%e8%a7%a3%e9%87%8a-%e5%a5%87%e8%bf%b9%e6%b3%95%e5%b8%88%e6%ad%a6%e5%99%a8%e5%86%8d%e7%94%9f%e7%82%b9%e4%bb%80%e4%b9%88%e5%b1%9e%e6%80%a7%e5%a5%bd","status":"publish","type":"post","link":"http:\/\/stmu.1000uc.com\/mu\/46449.html","title":{"rendered":"mu sd\u89e3\u91ca \u6cd5\u5e08\u6b66\u5668\u518d\u751f\u70b9\u4ec0\u4e48\u5c5e\u6027\u597d"},"content":{"rendered":"

\u5176\u5b9e\u5947\u8ff9mu sd\u89e3\u91ca\u7684\u95ee\u9898\u5e76\u4e0d\u590d\u6742\uff0c\u4f46\u662f\u53c8\u5f88\u591a\u7684\u670b\u53cb\u90fd\u4e0d\u592a\u4e86\u89e3\u5947\u8ff9\u6cd5\u5e08\u6b66\u5668\u518d\u751f\u70b9\u4ec0\u4e48\u5c5e\u6027\u597d\uff0c\u56e0\u6b64\u5462\uff0c\u4eca\u5929\u5c0f\u7f16\u5c31\u6765\u4e3a\u5927\u5bb6\u5206\u4eab\u5947\u8ff9mu sd\u89e3\u91ca\u7684\u4e00\u4e9b\u77e5\u8bc6\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u4e0b\u9762\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u8fd9\u4e2a\u95ee\u9898\u7684\u5206\u6790\u5427\uff01<\/p>\n

matlab\u4e2dmvnrnd\u51fd\u6570\u7528\u6cd5<\/h3>\n

R=mvnrnd(MU,SIGMA)\u2014\u2014\u4ece\u5747\u503c\u4e3aMU\uff0c\u534f\u65b9\u5dee\u4e3aSIGMA\u7684\u6b63\u6001\u5206\u5e03\u4e2d\u62bd\u53d6n*d\u7684\u77e9\u9635R\uff08n\u4ee3\u8868\u62bd\u53d6\u7684\u4e2a\u6570\uff0cd\u4ee3\u8868\u5206\u5e03\u7684\u7ef4\u6570\uff09\u3002<\/p>\n

MU\u4e3an*d\u7684\u77e9\u9635\uff0cR\u4e2d\u7684\u6bcf\u4e00\u884c\u4e3a\u4ee5MU\u4e2d\u5bf9\u5e94\u7684\u884c\u4e3a\u5747\u503c\u7684\u6b63\u6001\u5206\u5e03\u4e2d\u62bd\u53d6\u7684\u4e00\u4e2a\u6837\u672c\u3002<\/p>\n

SIGMA\u4e3add\u7684\u5bf9\u79f0\u534a\u6b63\u5b9a\u77e9\u9635\uff0c\u6216\u8005\u4e3addn\u7684array\u3002\u82e5SIGMA\u4e3aarray\uff0cR\u4e2d\u7684\u6bcf\u4e00\u884c\u5bf9\u5e94\u7684\u5206\u5e03\u7684\u534f\u65b9\u5dee\u77e9\u9635\u4e3a\u8be5array\u5bf9\u5e94\u7684\u4e00\u4e2apage\u3002\u4e5f\u5c31\u662f\u8bf4\uff1aR(i,:)\u7531MU(i,:)\u548cSIGMA(:,:,i)\u4ea7\u751f\u3002<\/p>\n

\u5982\u679c\u534f\u65b9\u5dee\u77e9\u9635\u4e3a\u5bf9\u89d2\u9635\uff0csigma\u4e5f\u53ef\u75281d\u5411\u91cf\u62161dn\u7684array\u8868\u793a\uff0c\u5982\u679cMU\u662f\u4e00\u4e2a1d\u7684\u5411\u91cf\uff0c\u5219SIGMA\u4e2d\u7684n\u4e2a\u534f\u65b9\u5dee\u77e9\u9635\u5171\u7528\u8fd9\u4e2aMU\u3002R\u7684\u884c\u6570n\u7531MU\u7684\u884c\u6570n\u6216\u8005SIGMA\u7684page\u6570n\u51b3\u5b9a\u3002<\/p>\n

r=mvnrnd(MU,SIGMA,cases)\u2014\u2014\u4ece\u5747\u503c\u4e3aMU(1d)\uff0c\u534f\u65b9\u5dee\u77e9\u9635\u4e3aSIGMA(dd)\u7684\u6b63\u6001\u5206\u5e03\u4e2d\u968f\u673a\u62bd\u53d6cases\u4e2a\u6837\u672c\uff0c\u8fd4\u56decasesd\u7684\u77e9\u9635r\u3002<\/p>\n

\u5173\u4e8e\u5947\u8ff9\u5723\u5bfc\u9e1f\u5723\u95ee\u9898<\/h3>\n

\u5bf9\u4e8e\u9e1f\u5723\uff0c\u65e0\u975e\u5c31\u662f\u4f53\u529b\u548c\u667a\u529b\u7684\u6743\u8861\u3002\u4e0b\u9762\u6211\u9996\u5148\u4ece\u88c5\u5907\u4e0a\u5206\u6790\u4e0d\u540c\u7684\u9e1f\u5723\u4ee5\u81f3\u6700\u540e\u5bfc\u81f4\u4e0d\u540c\u7684\u52a0\u70b9\u3002<\/p>\n

\u9996\u5148\u6b66\u5668\uff1a\u5723\u5c0a\u662f\u4e0d\u4e8c\u7684\u9009\u62e9\uff0c\u5982\u679c\u786c\u8981\u62ff\u81f3\u5c0a\u4e5f\u662f66%\u6765\u6bd4\u8f83\uff0c\u90a3\u771f\u7684\u65e0\u6cd5\u6c9f\u901a\u3002<\/p>\n

\u5723\u5c0a\u7684pvp200\u662f\u5426\u5bf9\u9e1f\u6709\u4f5c\u7528\uff0c\u8fd9\u70b9\u662f\u6211\u552f\u4e00\u4e0d\u80fd\u8bc1\u5b9e\u7684\uff0c\u56e0\u4e3a\u627e\u4e0d\u5230\u4e00\u6839\u6ca1\u6709pvp\u7684\u6765\u5b9e\u9a8c\u3002\u4f46\u53ef\u4ee5\u4fdd\u8bc1\u7684\u662f\uff0c\u4e0d\u62ff\u5723\u5c0a\uff0c\u653b\u51fb\u5b8c\u5168\u4e0d\u662f\u540c\u4e00\u6863\u6b21\u3002<\/p>\n

\u4e00\u822c\u9e1f\u5723\u5723\u5c0a\u90fd\u662f\u62ff\u8ffd0\uff0c\u53ef\u4ee5\u7701\u4e00\u4e9b\u70b9\u6570\u3002\u800c\u518d\u751f\u5c5e\u6027\u53ea\u67092\u79cd\u53ef\u4ee5\u53d1\u6325\u4f5c\u7528\u30021\u3001\u5c31\u662f-40\u529b\uff08\u4e5f\u662f\u4e3a\u4e86\u7701\u70b9\u6570\uff092\u3001wssd\uff08\u8bf4\u771f\u7684\uff0c\u9e1f\u5723\u9760\u7684\u5c31\u662f\u8010\u529b\uff0c\u78e8\u4eba\u3002\u9664\u975e\u5168\u7edf\u7684\uff0c\u4f46\u8fd9\u5f88\u5feb\u6b7b\u3002\uff09<\/p>\n

\u6709\u5f88\u591a\u4eba\u90fd\u662f\u62ffcp\u4ed7\u7684\uff0c\u90a3\u662f\u56e0\u4e3a\u53ef\u4ee5\u4e0e\u529b\u5723\u901a\u7528\u51cf\u4f4e\u6210\u672c\uff0c\u4f46\u771f\u6b63\u5b8c\u7f8e\u7684\u9e1f\u5723\u6765\u8bf4\uff0c-40\u529b\u662f\u6bd4\u8f83\u597d\u7684\u9009\u62e9\u3002<\/p>\n

\u81f3\u4e8e\u52a0\u70b9\uff0c\u5927\u6982\u6709\u51e0\u79cd\u3002<\/p>\n

1\u3001\u4f4e\u7edf\u9ad8\u4f53<\/p>\n

\u4ee5\u524d\u8fd9\u9002\u5408+f\u7684\u52a09\u88c5\u5907\uff0c\u4f46\u5176\u5b9e\u73b0\u57283\u7ea2\u5e74\u4ee3\uff0c\u4fdd\u6301\u4e0d\u6b7b\uff0c\u78e8\u5230\u5bf9\u65b9\u6ca1\u8840\u624d\u662f\u6700\u597d\u7684\uff0c\u8fd9\u4e5f\u662f\u6211\u73b0\u5728\u73a9\u7684\u9e1f\u5723\u7684\u52a0\u70b9\u3002\u6211\u7684\u529b\u662f424\uff08\u672c\u6765464\u7684\u5723\u5c0a-\u4e8640\u529b\uff09\u654f\u662f109\uff08\u53cd\u6b63\u81ea\u5df1\u7a7f\u7684\u88c5\u5907\u80fd\u7a7f\u4e0a\uff09\u667a\u529b\u5b66\u53ec\u5524\uff0c\u7edf\u52a0860\uff0c860\u7684\u7edf\u95ee\u4eba\u501f\u4e2agm\u58f0\u671b\u62ab\u98ce\u5e26\u7740\uff0c\u7136\u540e\u628a50\u7ea7\u9e1f\u653e\u4e0a\u53bb\uff0c\u518d\u628a\u62ab\u98ce\u62ff\u4e0b\uff0c\u5c31\u53ef\u4ee5\u5e26\u52a0s\u6216\u8005ws\u7684\u62ab\u98ce\uff08ws\u62ab\u98ce\u6709\u6548\u679c\uff09\u90a3\u5c31\u7701\u4e86\u4e0d\u5c11\u7684\u70b9\u6570\uff0c\u7279\u522b\u662f\u62ff+s\u7684\uff0c\u8fd9\u6837\u5361\u9e1f\uff0c\u653b\u51fb\u662f\u8ddf935\u62ff50\u7ea7\u9e1f\u7684\u4e00\u6837\u3002\u5982\u679c\u5168\u679c\u7a7f+f7\u4ef6\u662f\u5927\u6982\u67095\u5343\u8840\u3002\u9e1f\u6253\u4eba\u5982\u4f55\uff0c\u6253cp\u9f99450\u84dd\u8272\uff08\u6700\u5927\u653b\u51fb\uff09\u662f700\u591a\u3002\u6211\u6562\u8bf4\u57283\u7ea2\u7684\u5e74\u4ee3\uff0c\u5728\u91ce\u5916\u6ca1\u4e00\u4e2a\u804c\u4e1a\u6562\u548c\u6211\u78e8\u3002\u7684\u786e\u5c31\u662f\u770b\u8c01\u5148\u628a\u7ea2\u78e8\u5b8c\u3002<\/p>\n

2\u3001\u7edf\u4f53\u5404\u534a<\/p>\n

\u8fd9\u4e2a\u52a0\u70b9\u9002\u5408\u7a7f+13cp\u7684\u88c5\u5907\uff0c\u65e0\u8bba\u662f\u5723\u5143\u8fd8\u662f\u81f3\u5c0a\uff0c\u53ea\u8981\u670913\u8ffd28\u7684\u9632\u5fa1\uff0c\u6709-7\u7684\u6c14\u52bf\u3002\u8fd9\u6837\u5df2\u7ecf\u4e0d\u9700\u8981\u52a0\u8fd9\u4e48\u591a\u4f53\u529b\u4e86\uff0c\u53ea\u8981\u9876\u4f4f\u5bf9\u65b9\u7684\u4e00\u6b21\u653b\u51fb\uff0c\u4e0d\u8981\u88ab\u79d2\u5c31\u53ef\u4ee5\u4e86\u3002\u5927\u69821300~1600\u8fd9\u4e2a\u5e45\u5ea6\u7684\u7edf\u8db3\u4ee5\u628acp\u88c5\u5907\u54ac\u5230\u5c41\u80a1\u5f00\u82b1\u3002<\/p>\n

3\u3001\u4f4e\u4f53\u9ad8\u7edf<\/p>\n

\u8fd9\u79cd\u662f\u5fc5\u987b\u7a7fcp\u88c5\u5907\uff0c\u7279\u522b\u662f+-\u81f3\u5c0a\u8fd9\u4e9b\u9ad8\u6863\u8d27\uff0c1800~2100\u7684\u7edf\uff0c\u8840\u91cf\u53ea\u662f\u6bd4\u6ca1\u52a0\u597d\u4e00\u70b9\u3002\u4f46\u7531\u4e8e\u88c5\u5907\u4f18\u52bf\u3002\u53ea\u8981\u4e0d\u662f\u7279\u6b8a\u653b\u51fb\u8f93\u51fa\uff0c\u90fd\u6b7b\u4e0d\u4e86\u3002\u8fd9\u6837\u7684\u9e1f\u5723\u9700\u8981\u826f\u597d\u7684\u64cd\u4f5c\uff0c\u8fd9\u65f6\u5019\u62ffwssd\u4e5f\u6709\u70b9\u610f\u4e49\u3002\u4f46\u6211\u8fd8\u662f\u5efa\u8bae-40\uff0c\u6bd5\u7adf\u78e8\u6b7b\u5bf9\u65b9\u624d\u662f\u91ce\u5916\u771f\u7406\u3002<\/p>\n

\u5bf9\u4e8e\u9e1f\u5723\u7684\u6218\u6597\u6a21\u5f0f\uff1a<\/p>\n

\u5982\u679c\u67d0\u4e00\u5929\u5bf9\u65b9\u8bf4\uff0c\u6709\u79cd\u522b\u8dd1\uff0c\u90a3\u4f60\u5c31\u53eb\u6218\u58eb\u522b\u8fde\u51fb\uff0c\u53eb\u6cd5\u522b\u95ea\uff0c\u53ebmm\u522b\u51b0\u3002\u4e00\u4e2a\u804c\u4e1a\u7684\u6027\u8d28\u88ab\u7981\u6b62\uff0c\u90a3\u5c31\u7b49\u4e8e\u6ca1\u73a9\u3002\u5fc5\u987b\u8dd1\uff0c\u8dd1\u591a\u4e86\u5c31\u6709\u611f\u89c9\uff0c\u800c\u4e14\u6709\u9884\u5224\uff0c\u9884\u611f\u4ed6\u7684\u65b9\u5411\uff0c\u4e00\u76f4\u56f4\u7740\u5bf9\u65b9\u4ee5\u4ed6\u4e3a\u5706\u5fc3\uff0c\u4e00\u76f4\u62c9\u5230\u5c3d\u91cf\u5927\u7684\u8ddd\u79bb\u800c\u9e1f\u80fd\u54ac\u5230\u7684\u8ddd\u79bb\uff0c\u4e0d\u65ad\u76d8\u65cb\u3002\u8fd9\u6837\u628a\u73b0\u5728\u7684\u6218\u58eb\u50cf\u6e9c\u72d7\u4e00\u6837\u6b3a\u8d1f\u57fa\u672c\u662f\u6ca1\u6709\u4efb\u4f55\u538b\u529b\u3002<\/p>\n

\u6211\u7a7fcp\u5b99\u65af\u57fa\u672c\u641e\u6b7b\u4e00\u4e2a\u6218\u58eb\u53ea\u662f\u5403\u4e8620\u4e2a\u7ea2\uff0c\u5927\u6982\u5bf9\u65b9\u662f\u5168\u8eab\u5403\u5149\u624d\u6b7b\uff0c\u56e0\u4e3a\u6211\u662f\u78e8\u6b7b\uff0c\u4ed6\u6ca1\u6709\u7ea2\u624d\u4f1a\u6b7b\uff0c\u6709\u7ea2\u53ea\u8981\u5403\u90fd\u6b7b\u4e0d\u4e86\u3002<\/p>\n

\u5bf9\u6bd4\u4e00\u4e0b\u5b99\u65af\u548c\u81f3\u5c0a\u5427\u3002\u53cd\u6b63\u6211\u7a7f\u5b99\u65af\u7684\u65f6\u5019\u6ca1\u9047\u5230\u8fc7\u8c01\u80fd\u6740\u6b7b\u6211\uff0c\u4e00\u6765\u6211\u662f\u8840\u7edf\uff0c\u6bd4\u8f83\u9ad8\u8840\uff0c2\u6765\u73b0\u5728\u7ea2\u4e0d\u8010\u5403\u3002pvp\u7684sd\u589e\u52a0\u6062\u590d\u8fd8\u6709pvp200\u9632\u5fa1\uff08\u65e0\u8bba\u5bf9\u65b9\u6253\u4f60\u591a\u5c11\uff0c\u76f4\u63a5\u51cf200\u8840\u7684\u6d88\u8017\uff0c\u6253\u4f601000\u5c31\u53d8800\uff09\u8fd9\u662f\u94c1\u94c1\u7684\u5389\u5bb3\uff0c\u6bd4\u591a\u4e86200\u9632\u8fd8\u6709\u7528\u3002380\u7684sd\u4e00\u5411\u5389\u5bb3\u30021\u4e07\u591a\u7684sd\uff0c\u5176\u5b9e\u6ee1\u9002\u5408\u529b\u5723\u73a9\u5c0f\u9000\uff0c109\u654f\u7a7f\u8d77\u6765\u6709916\u7684\u9632\u5fa1\uff0c\u6211\u7a7f\u7684\u662f\u52a08\u62ab\u98ce\u3002<\/p>\n

\u4e0e\u81f3\u5c0a\u6bd4\u8d77\u6765\uff0c\u4ef7\u683c\u4e0a\u662f\u5b8c\u80dc\u7684\uff0c\u4f46\u81f3\u5c0a\u7684\u786e\u5c31\u662f\u5723\u6700\u597d\u7684\u88c5\u5907\uff0c\u5982\u679c\u6709\u4e00\u59574\u9632\u81f3\u5c0a\uff0c\u73a9\u9e1f\u5723\u662f\u600e\u4e48\u52a0\u90fd\u6709\u9053\u7406\u3002\u53cd\u6b63\u89c6\u81ea\u5df1\u7684\u94b1\u5305\u800c\u5b9a\u3002<\/p>\n

\u6700\u540e\u5c31\u662f\u81f3\u5c0a\u5b9e\u5728\u592a\u96be\u770b\u4e86\uff0c\u6bd4\u8d77\u9ec4\u888d\u52a0\u8eab\u7684\u5b99\u65af\uff0c\u592a\u4e00\u822c\u4e86\u3002<\/p>\n

\u5982\u4f55\u590d\u5236\u52a0\u5bc6u\u76d8\u6587\u4ef6<\/h3>\n

\u65b9\u6cd5\u5982\u4e0b\u3002\u5982\u679c\u4f60\u662fU\u76d8\u7684\u62e5\u6709\u8005\uff0c\u6216\u8005\u4f60\u77e5\u9053\u5bc6\u7801\uff0c\u8fd9\u65f6\u5019\u6211\u4eec\u76f4\u63a5\u5c06U\u76d8\u7684\u52a0\u5bc6\u6587\u4ef6\u53f3\u51fb\u4e4b\u540e\u9009\u62e9\u5c5e\u6027\u5728\u5c5e\u6027\u4e2d\u8f93\u5165\u6b63\u786e\u7684\u52a0\u5bc6\u7684\u5bc6\u7801\uff0c\u8fd9\u65f6\u5019\u5c31\u53ef\u4ee5\u8fdb\u884c\u6587\u4ef6\u7684\u89e3\u5bc6\uff0c\u89e3\u5bc6\u4e4b\u540e\u901a\u8fc7\u590d\u5236\u5230\u526a\u5207\u677f\u7136\u540e\u7c98\u8d34\u5230\u4f60\u6240\u9700\u8981\u7684\u4f4d\u7f6e\u3002\u5982\u679c\u6ca1\u6709\u5bc6\u7801\u662f\u65e0\u6cd5\u590d\u5236\u7684\uff0c\u5fc5\u987b\u5411\u8bbe\u7f6e\u5bc6\u7801\u8005\u7d22\u53d6\u3002<\/p>\n

\u5947\u8ff9\u6cd5\u5e08\u6b66\u5668\u518d\u751f\u70b9\u4ec0\u4e48\u5c5e\u6027\u597d<\/h3>\n

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