![\"\"](\"http:\/\/39.107.80.187\/wp-content\/uploads\/2020\/09\/image-1.png\")
<\/figure>\n\n\n\n\u5982\u4e0a\uff0c\u6700\u5178\u578b\u7684\u4fe1\u606f\u8ba1\u7b97\u65b9\u5f0f<\/p>\n\n\n\n
\u71b5\u662f\u7528\u6765\u5ea6\u91cf\u4e0d\u786e\u5b9a\u6027\u7684\uff0c\u5f53\u71b5\u8d8a\u5927\uff0cX=xi\u7684\u4e0d\u786e\u5b9a\u6027\u8d8a\u5927\uff0c\u53cd\u4e4b\u8d8a\u5c0f\u3002\u5bf9\u4e8e\u673a\u5668\u5b66\u4e60\u4e2d\u7684\u5206\u7c7b\u95ee\u9898\u800c\u8a00\uff0c\u71b5\u8d8a\u5927\u5373\u8fd9\u4e2a\u7c7b\u522b\u7684\u4e0d\u786e\u5b9a\u6027\u66f4\u5927\uff0c\u53cd\u4e4b\u8d8a\u5c0f\u3002<\/p>\n\n\n\n
\u4fe1\u606f\u589e\u76ca\u5728\u51b3\u7b56\u6811\u7b97\u6cd5\u4e2d\u662f\u7528\u6765\u9009\u62e9\u7279\u5f81\u7684\u6307\u6807\uff0c\u4fe1\u606f\u589e\u76ca\u8d8a\u5927\uff0c\u5219\u8fd9\u4e2a\u7279\u5f81\u7684\u9009\u62e9\u6027\u8d8a\u597d\u3002<\/p>\n\n\n\n
\u51b3\u7b56\u6811\u662f\u4e00\u79cd\u6811\u5f62\u7ed3\u6784\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5185\u90e8\u8282\u70b9\u8868\u793a\u4e00\u4e2a\u5c5e\u6027\u4e0a\u7684\u6d4b\u8bd5\uff0c\u6bcf\u4e2a\u5206\u652f\u4ee3\u8868\u4e00\u4e2a\u6d4b\u8bd5\u8f93\u51fa\uff0c\u6bcf\u4e2a\u53f6\u8282\u70b9\u4ee3\u8868\u4e00\u79cd\u7c7b\u522b\u3002\u5e38\u89c1\u7684\u51b3\u7b56\u6811\u7b97\u6cd5\u6709C4.5\u3001ID3\u548cCART\u3002<\/p>\n\n\n\n
\u96c6\u6210\u5b66\u4e60\u901a\u8fc7\u5efa\u7acb\u51e0\u4e2a\u6a21\u578b\u7ec4\u5408\u7684\u6765\u89e3\u51b3\u5355\u4e00\u9884\u6d4b\u95ee\u9898\u3002\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f\u751f\u6210\u591a\u4e2a\u5206\u7c7b\u5668\/\u6a21\u578b\uff0c\u5404\u81ea\u72ec\u7acb\u5730\u5b66\u4e60\u548c\u4f5c\u51fa\u9884\u6d4b\u3002\u8fd9\u4e9b\u9884\u6d4b\u6700\u540e\u7ed3\u5408\u6210\u5355\u9884\u6d4b\uff0c\u56e0\u6b64\u4f18\u4e8e\u4efb\u4f55\u4e00\u4e2a\u5355\u5206\u7c7b\u7684\u505a\u51fa\u9884\u6d4b\u3002<\/p>\n\n\n\n
\u968f\u673a\u68ee\u6797\u4f9d\u9760\u4e8e\u51b3\u7b56\u6811\u7684\u6295\u7968\u9009\u62e9\u6765\u51b3\u5b9a\u6700\u540e\u7684\u5206\u7c7b\u7ed3\u679c\u3002\u4f46\u662f\u4ece\u67d0\u79cd\u89d2\u5ea6\u6765\u8bf4\uff0c\u7ec6\u5206\u6765\u770b\u548c\u6211\u4eec\u60f3\u7684\u4e0d\u592a\u4e00\u6837\uff1a<\/p>\n\n\n\n
\u68ee\u6797\u4e2d\u7684\u6bcf\u68f5\u6811\u90fd\u662f\u72ec\u7acb\u7684\uff0c99.9%\u4e0d\u76f8\u5173\u7684\u6811\u505a\u51fa\u7684\u9884\u6d4b\u7ed3\u679c\u6db5\u76d6\u6240\u6709\u7684\u60c5\u51b5\uff0c\u8fd9\u4e9b\u9884\u6d4b\u7ed3\u679c\u5c06\u4f1a\u5f7c\u6b64\u62b5\u6d88\u3002\u5c11\u6570\u4f18\u79c0\u7684\u6811\u7684\u9884\u6d4b\u7ed3\u679c\u5c06\u4f1a\u8d85\u8131\u4e8e\u82b8\u82b8\u201c\u566a\u97f3\u201d\uff0c\u505a\u51fa\u4e00\u4e2a\u597d\u7684\u9884\u6d4b\u3002\u5c06\u82e5\u5e72\u4e2a\u5f31\u5206\u7c7b\u5668\u7684\u5206\u7c7b\u7ed3\u679c\u8fdb\u884c\u6295\u7968\u9009\u62e9\uff0c\u4ece\u800c\u7ec4\u6210\u4e00\u4e2a\u5f3a\u5206\u7c7b\u5668\u3002<\/p>\n\n\n\n
\u8bf4\u4e00\u4e0b\u96c6\u6210\u5b66\u4e60\u7684bagging<\/strong>\uff0c\u540d\u79f0\u6765\u6e90\u4e8e \uff08 B<\/strong>ootstrap AGG<\/strong>regatING<\/strong> \uff09\uff0c\u610f\u601d\u662f\u81ea\u52a9\u62bd\u6837\u96c6\u6210\uff0c\u8fd9\u79cd\u65b9\u6cd5\u5c06\u8bad\u7ec3\u96c6\u5206\u6210m\u4e2a\u65b0\u7684\u8bad\u7ec3\u96c6\uff0c\u7136\u540e\u5728\u6bcf\u4e2a\u65b0\u8bad\u7ec3\u96c6\u4e0a\u6784\u5efa\u4e00\u4e2a\u6a21\u578b\uff0c\u5404\u81ea\u4e0d\u76f8\u5e72\uff0c\u6700\u540e\u9884\u6d4b\u65f6\u6211\u4eec\u5c06\u8fd9\u4e2am\u4e2a\u6a21\u578b\u7684\u7ed3\u679c\u8fdb\u884c\u6574\u5408\uff0c\u5f97\u5230\u6700\u7ec8\u7ed3\u679c\u3002\u6574\u5408\u65b9\u5f0f\u5c31\u662f\uff1a\u5206\u7c7b\u95ee\u9898\u7528majority voting\uff0c\u56de\u5f52\u7528\u5747\u503c\u3002<\/p>\n\n\n\n 2\u3001\u63a5\u4e0b\u6765\u6211\u4eec\u770b\u4e00\u4e0b\u5177\u4f53\u64cd\u4f5c\u968f\u673a\u68ee\u6797\u7684\u65b9\u6cd5\u54c8<\/p>\n\n\n\n 1\uff09\u5982\u679c\u8bad\u7ec3\u96c6\u5927\u5c0f\u4e3aN\uff0c\u5bf9\u4e8e\u6bcf\u68f5\u6811\u800c\u8a00\uff0c\u968f\u673a\u4e14\u6709\u653e\u56de\u5730\u4ece\u8bad\u7ec3\u96c6\u4e2d\u7684\u62bd\u53d6N\u4e2a\u8bad\u7ec3\u6837\u672c\uff08\u8fd9\u79cd\u91c7\u6837\u65b9\u5f0f\u79f0\u4e3abootstrap sample\u65b9\u6cd5\uff09\uff0c\u4f5c\u4e3a\u8be5\u6811\u7684\u8bad\u7ec3\u96c6\uff1b<\/p>\n\n\n\n \u7a0d\u5fae\u89e3\u91ca\u4e00\u4e0b<\/p>\n\n\n\n \u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\uff1a\u6bcf\u68f5\u6811\u7684\u8bad\u7ec3\u96c6\u90fd\u662f\u4e0d\u540c\u7684<\/strong>\uff0c\u800c\u4e14\u91cc\u9762\u53ef\u4ee5\u5305\u542b\u91cd\u590d\u7684\u8bad\u7ec3\u6837\u672c\uff0c\u5982\u679c\u4e0d\u8fdb\u884c\u968f\u673a\u62bd\u6837\u540e\u6bcf\u68f5\u6811\u7684\u8bad\u7ec3\u96c6\u90fd\u4e00\u6837\uff0c\u90a3\u4e48\u6700\u7ec8\u8bad\u7ec3\u51fa\u7684\u6811\u5206\u7c7b\u7ed3\u679c\u4e5f\u662f\u5b8c\u5168\u4e00\u6837\u7684\uff0c\u8fd9\u6837\u7684\u8bdd\u5b8c\u5168\u6ca1\u6709bagging\u7684\u5fc5\u8981\uff1b<\/p>\n\n\n\n \u5982\u679c\u4e0d\u662f\u6709\u653e\u56de\u7684\u62bd\u6837\uff0c\u90a3\u4e48\u6bcf\u68f5\u6811\u7684\u8bad\u7ec3\u6837\u672c\u90fd\u662f\u4e0d\u540c\u7684\uff0c\u90fd\u662f\u6ca1\u6709\u4ea4\u96c6\u7684\uff0c\u8fd9\u6837\u6bcf\u68f5\u6811\u90fd\u662f\u7edd\u5bf9”\u7247\u9762\u7684”\u4e5f\u5c31\u662f\u8bf4\u6bcf\u68f5\u6811\u8bad\u7ec3\u51fa\u6765\u90fd\u662f\u6709\u5f88\u5927\u7684\u5dee\u5f02\u7684\uff1b\u800c\u968f\u673a\u68ee\u6797\u6700\u540e\u5206\u7c7b\u53d6\u51b3\u4e8e\u591a\u68f5\u6811\uff08\u5f31\u5206\u7c7b\u5668\uff09\u7684\u6295\u7968\u8868\u51b3\uff0c\u8fd9\u79cd\u8868\u51b3\u5e94\u8be5\u662f”\u6c42\u540c”\uff0c\u56e0\u6b64\u4f7f\u7528\u5b8c\u5168\u4e0d\u540c\u7684\u8bad\u7ec3\u96c6\u6765\u8bad\u7ec3\u6bcf\u68f5\u6811\u8fd9\u6837\u5bf9\u6700\u7ec8\u5206\u7c7b\u7ed3\u679c\u662f\u6ca1\u6709\u5e2e\u52a9\u7684\uff0c\u4e5f\u8fbe\u4e0d\u5230bagging\u7684\u610f\u4e49<\/p>\n\n\n\n 2\uff09\u5982\u679c\u6bcf\u4e2a\u6837\u672c\u7684\u7279\u5f81\u7ef4\u5ea6\u4e3aM\uff0c\u6307\u5b9a\u4e00\u4e2a\u5e38\u6570m<<M\uff0c\u968f\u673a\u5730\u4eceM\u4e2a\u7279\u5f81\u4e2d\u9009\u53d6m\u4e2a\u7279\u5f81\u5b50\u96c6\uff0c\u6bcf\u6b21\u6811\u8fdb\u884c\u5206\u88c2\u65f6\uff0c\u4ece\u8fd9m\u4e2a\u7279\u5f81\u4e2d\u9009\u62e9\u6700\u4f18\u7684\uff1b<\/p>\n\n\n\n 3\uff09\u6bcf\u68f5\u6811\u90fd\u5c3d\u6700\u5927\u7a0b\u5ea6\u7684\u751f\u957f\uff0c\u5e76\u4e14\u6ca1\u6709\u526a\u679d\u8fc7\u7a0b\u3002<\/p>\n\n\n\n \u4e00\u5f00\u59cb\u6211\u4eec\u63d0\u5230\u7684\u968f\u673a\u68ee\u6797\u4e2d\u7684\u201c\u968f\u673a\u201d\u5c31\u662f\u6307\u7684\u8fd9\u91cc\u7684\u4e24\u4e2a\u968f\u673a\u6027\u3002\u4e24\u4e2a\u968f\u673a\u6027\u7684\u5f15\u5165\u5bf9\u968f\u673a\u68ee\u6797\u7684\u5206\u7c7b\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002\u7531\u4e8e\u5b83\u4eec\u7684\u5f15\u5165\uff0c\u4f7f\u5f97\u968f\u673a\u68ee\u6797\u4e0d\u5bb9\u6613\u9677\u5165\u8fc7\u62df\u5408\uff0c\u5e76\u4e14\u5177\u6709\u5f88\u597d\u5f97\u6297\u566a\u80fd\u529b\uff08\u5bf9\u7f3a\u7701\u503c\u4e0d\u654f\u611f\uff09<\/p>\n\n\n\n \u3000\u3000\u968f\u673a\u68ee\u6797\u5206\u7c7b\u6548\u679c\uff08\u9519\u8bef\u7387\uff09\u4e0e\u4e24\u4e2a\u56e0\u7d20\u6709\u5173\uff1a\u68ee\u6797\u4e2d\u4efb\u610f\u4e24\u68f5\u6811\u7684\u76f8\u5173\u6027\uff1a\u76f8\u5173\u6027\u8d8a\u5927\uff0c\u9519\u8bef\u7387\u8d8a\u5927\uff1b\u68ee\u6797\u4e2d\u6bcf\u68f5\u6811\u7684\u5206\u7c7b\u80fd\u529b\uff1a\u6bcf\u68f5\u6811\u7684\u5206\u7c7b\u80fd\u529b\u8d8a\u5f3a\uff0c\u6574\u4e2a\u68ee\u6797\u7684\u9519\u8bef\u7387\u8d8a\u4f4e\u3002\u3000\u51cf\u5c0f\u7279\u5f81\u9009\u62e9\u4e2a\u6570m\uff0c\u6811\u7684\u76f8\u5173\u6027\u548c\u5206\u7c7b\u80fd\u529b\u4e5f\u4f1a\u76f8\u5e94\u7684\u964d\u4f4e\uff1b\u589e\u5927m\uff0c\u4e24\u8005\u4e5f\u4f1a\u968f\u4e4b\u589e\u5927\u3002\u6240\u4ee5\u5173\u952e\u95ee\u9898\u662f\u5982\u4f55\u9009\u62e9\u6700\u4f18\u7684m\uff08\u6216\u8005\u662f\u8303\u56f4\uff09\uff0c\u8fd9\u4e5f\u662f\u968f\u673a\u68ee\u6797\u552f\u4e00\u7684\u4e00\u4e2a\u53c2\u6570\u3002<\/p>\n\n\n\n \u6211\u76f4\u547c\u5185\u884c…<\/p>\n\n\n\n \u3007\u3001\u5199\u5728\u524d\u9762 \u5f88\u4e45\u5f88\u4e45\u6ca1\u6709\u66f4\u65b0\u4e86\uff0c3\u4e2a\u6708\uff0c\u4ec5\u4ec5\u662f\u5145\u4e8628.5CNY\u540e\u5c31\u6302\u5728\u8fd9\uff0c\u8fd9\u4e09\u4e2a\u6708\u5f88\u5fd9\uff0c\u5fd9\u7740\u671f\u672b\u590d\u4e60\uff0c\u5fd9\u7740\u7ed9\u8fc7\u53bb\u7684\u81ea\u5df1\u64e6\u5c41\u80a1\uff0c\u5fd9\u7740\u544a\u522b\u8fc7\u53bb\u548c\u8fce\u63a5\u672a\u6765\uff0c\u5fd9\u7740\u5bfb\u627e\u81ea\u5df1\u7684\u70ed\u7231\u3002 \u73b0\u5728\u7684\u81ea\u5df1\u5f88\u5f00\u5fc3\uff0c\u6bcf\u5929\u90fd...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-444","post","type-post","status-publish","format-standard","hentry","category-5"],"_links":{"self":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts\/444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=444"}],"version-history":[{"count":0,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts\/444\/revisions"}],"wp:attachment":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=444"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\n\n\nimport sklearn\nfrom sklearn.datasets import load_iris\nfrom sklearn.ensemble import RandomForestClassifier\nfrom sklearn.datasets import make_classification\nimport numpy as np\nimport pandas as pd\n\n# \u5bfc\u5165\u6570\u636e\uff1a\u8bad\u7ec3\u96c6\u3001\u6d4b\u8bd5\u96c6\nnum = 100\nnumi = 1667\n\ndata_1 = g5_data530_power ## \u8fd9\u91cc\u6ca1\u6570\u636e\u81ea\u5df1\u5bfc\u5165\u4e00\u4e0b\n\n##\u8bb0\u5f97\u8fd8\u8981\u5bfc\u5165data530_power\u7684\u90a3\u4e2a\n\n#test_data(1:numi,1:2*0.3*num) = [data_1(1:numi,1:0.3*num),data530_power(1:numi,1:0.3*num)]\ntest_data = [data_1(1:numi,1:0.3*num),data530_power(1:numi,1:0.3*num)]\n#train_data(1:numi,1:2*0.7*num)=[data_1(1:numi,0.3*num+1:num),data530_power(1:numi,0.3*num+1:num)]\ntrain_data = [data_1(1:numi,0.3*num+1:num),data530_power(1:numi,0.3*num+1:num)]\n\ntest_num = 0.3 * num\ntrain_num = 0.7 * num\n\n# train_label=ones(1,train_num*2)\n# train_label(1,train_num+1:train_num*2)=ones(1,train_num)*2\n\ntest_label = ones(1,test_num*2)\n# test_label(1,test_num+1:test_num*2)=ones(1,test_num)*2\n\n\n\n# \u5229\u7528\u968f\u673a\u68ee\u6797\u9884\u6d4b\nnTree = 50\nn_estimator = nTree # python\u4e2d\u7684\u53c2\u6570\u540d\u79f0\n\niris = load_iris()\ndf = pd.DataFrame(iris.data,columns=iris,featute_names)\n\n\n'''\nB = TreeBagger(nTree,train_data,train_label)\n\n\npredict_label = predict(B,test_data)\n\npredict_label1 = cell2mat(predict_label)\npredict_label2 = str2num(predict_label1)\n\n\n'''\n# \u5229\u7528\u5faa\u73af\u8ba1\u7b97ACC\np = 0\n\nfor i in range(1,31)\n if predict_label2(i,1) == 1\n p = p + 1\n else \n continue\n\nfor i in range(31,61)\n if predict_label2(i,1) == 2\n p=p+1\n else \n continue \n\nACC_1 = p\/0.6\nACC = strcat(num2str(ACC_1),'%')\n\n\n\n\n\n# \u4f5c\u56fe\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"