{"id":1222,"date":"2023-07-27T06:00:40","date_gmt":"2023-07-27T06:00:40","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e8%a3%85%e8%a2%8b%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0\/"},"modified":"2023-07-27T06:00:40","modified_gmt":"2023-07-27T06:00:40","slug":"%e8%a3%85%e8%a2%8b%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e8%a3%85%e8%a2%8b%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0\/","title":{"rendered":"\u673a\u5668\u5b66\u4e60\u4e2d\u7684 bagging \u7b80\u4ecb"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u5f53\u4e00\u7ec4\u9884\u6d4b\u53d8\u91cf\u548c<a href=\"https:\/\/statorials.org\/cn\/\u53d8\u91cf\u89e3\u91ca\u6027\u53cd\u5e94\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u54cd\u5e94\u53d8\u91cf<\/a>\u4e4b\u95f4\u7684\u5173\u7cfb\u662f\u7ebf\u6027\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<a href=\"https:\/\/statorials.org\/cn\/\u591a\u5143\u7ebf\u6027\u56de\u5f52-1\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u591a\u5143\u7ebf\u6027\u56de\u5f52<\/a>\u7b49\u65b9\u6cd5\u6765\u5bf9\u53d8\u91cf\u4e4b\u95f4\u7684\u5173\u7cfb\u8fdb\u884c\u5efa\u6a21\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u7136\u800c\uff0c\u5f53\u5173\u7cfb\u6bd4\u8f83\u590d\u6742\u65f6\uff0c\u6211\u4eec\u5e38\u5e38\u4e0d\u5f97\u4e0d\u6c42\u52a9\u4e8e\u975e\u7ebf\u6027\u65b9\u6cd5\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\u662f <a href=\"https:\/\/statorials.org\/cn\/\u5206\u7c7b\u548c\u56de\u5f52\u6811\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u5206\u7c7b\u548c\u56de\u5f52\u6811<\/a>\uff08\u901a\u5e38\u7f29\u5199\u4e3a CART\uff09\uff0c\u5b83\u4f7f\u7528\u4e00\u7ec4\u9884\u6d4b\u53d8\u91cf\u6765\u521b\u5efa\u9884\u6d4b\u54cd\u5e94\u53d8\u91cf\u503c\u7684<em>\u51b3\u7b56\u6811<\/em>\u3002<\/span> <\/p>\n<figure id=\"attachment_12094\" aria-describedby=\"caption-attachment-12094\" style=\"width: 453px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-12094\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/arbre3.png\" alt=\"\" width=\"453\" height=\"347\" srcset=\"\" sizes=\"auto, \"><figcaption id=\"caption-attachment-12094\" class=\"wp-caption-text\"><strong><span style=\"color: #000000;\">\u4f7f\u7528\u591a\u5e74\u7ecf\u9a8c\u548c\u5e73\u5747\u672c\u5792\u6253\u6765\u9884\u6d4b\u804c\u4e1a\u68d2\u7403\u8fd0\u52a8\u5458\u85aa\u6c34\u7684\u56de\u5f52\u6811\u793a\u4f8b\u3002<\/span><\/strong><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">\u7136\u800c\uff0cCART \u6a21\u578b\u7684\u7f3a\u70b9\u662f\u5b83\u4eec\u5f80\u5f80\u4f1a\u906d\u53d7 <a href=\"https:\/\/statorials.org\/cn\/\u504f\u5dee\u65b9\u5dee\u6298\u8877\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u9ad8\u65b9\u5dee\u7684<\/a>\u5f71\u54cd\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u6211\u4eec\u5c06\u6570\u636e\u96c6\u5206\u6210\u4e24\u534a\u5e76\u5c06\u51b3\u7b56\u6811\u5e94\u7528\u4e8e\u4e24\u534a\uff0c\u7ed3\u679c\u53ef\u80fd\u4f1a\u975e\u5e38\u4e0d\u540c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u7528\u6765\u51cf\u5c11 CART \u6a21\u578b\u65b9\u5dee\u7684\u4e00\u79cd\u65b9\u6cd5\u79f0\u4e3a<strong>\u88c5\u888b<\/strong>\uff0c\u6709\u65f6\u79f0\u4e3a<em>\u5f15\u5bfc\u805a\u5408<\/em>\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u4ec0\u4e48\u662f\u5957\u888b\uff1f<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u5f53\u6211\u4eec\u521b\u5efa\u5355\u4e2a\u51b3\u7b56\u6811\u65f6\uff0c\u6211\u4eec\u4ec5\u4f7f\u7528\u4e00\u7ec4\u8bad\u7ec3\u6570\u636e\u6765\u6784\u5efa\u6a21\u578b\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u7136\u800c\uff0c <strong>bagging<\/strong>\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1.<\/strong>\u4ece\u539f\u59cb\u6570\u636e\u96c6\u4e2d\u83b7\u53d6<em>b \u4e2a<\/em>\u5f15\u5bfc\u6837\u672c\u3002<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u56de\u60f3\u4e00\u4e0b\uff0c<em>\u5f15\u5bfc\u6837\u672c<\/em>\u662f\u6765\u81ea\u539f\u59cb\u6570\u636e\u96c6\u7684\u6837\u672c\uff0c\u5176\u4e2d\u901a\u8fc7\u66ff\u6362\u8fdb\u884c\u89c2\u5bdf\u3002<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>2.<\/strong>\u4e3a\u6bcf\u4e2a\u5f15\u5bfc\u6837\u672c\u521b\u5efa\u51b3\u7b56\u6811\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>3.<\/strong>\u5bf9\u6bcf\u68f5\u6811\u7684\u9884\u6d4b\u8fdb\u884c\u5e73\u5747\u4ee5\u83b7\u5f97\u6700\u7ec8\u6a21\u578b\u3002<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u5bf9\u4e8e\u56de\u5f52\u6811\uff0c\u6211\u4eec\u53d6<em>B<\/em>\u6811\u9884\u6d4b\u7684\u5e73\u5747\u503c\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u5bf9\u4e8e\u5206\u7c7b\u6811\uff0c\u6211\u4eec\u91c7\u7528<em>B<\/em>\u6811\u505a\u51fa\u7684\u6700\u5e38\u89c1\u7684\u9884\u6d4b\u3002<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Bagging \u53ef\u4ee5\u4e0e\u4efb\u4f55\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\u4e00\u8d77\u4f7f\u7528\uff0c\u4f46\u5b83\u5bf9\u4e8e\u51b3\u7b56\u6811\u7279\u522b\u6709\u7528\uff0c\u56e0\u4e3a\u5b83\u4eec\u672c\u8d28\u4e0a\u5177\u6709\u9ad8\u65b9\u5dee\uff0c\u800c bagging \u80fd\u591f\u663e\u7740\u51cf\u5c11\u65b9\u5dee\uff0c\u4ece\u800c\u51cf\u5c11\u6d4b\u8bd5\u9519\u8bef\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4e3a\u4e86\u5c06 bagging \u5e94\u7528\u4e8e\u51b3\u7b56\u6811\uff0c\u6211\u4eec\u5728\u6df1\u5ea6\u4e0a<em>\u79cd\u690d<\/em>\u5355\u4e2a\u6811\u800c\u4e0d\u5bf9\u5176\u8fdb\u884c\u4fee\u526a\u3002\u8fd9\u5bfc\u81f4\u4e2a\u4f53\u6811\u5177\u6709\u9ad8\u65b9\u5dee\u4f46\u4f4e\u504f\u5dee\u3002\u7136\u540e\uff0c\u5f53\u6211\u4eec\u4ece\u8fd9\u4e9b\u6811\u4e2d\u83b7\u53d6\u5e73\u5747\u9884\u6d4b\u65f6\uff0c\u6211\u4eec\u5c31\u80fd\u591f\u51cf\u5c11\u65b9\u5dee\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5728\u5b9e\u8df5\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528 50 \u5230 500 \u68f5\u6811\u5373\u53ef\u5b9e\u73b0\u6700\u4f73\u6027\u80fd\uff0c\u4f46\u4e5f\u53ef\u4ee5\u62df\u5408\u6570\u5343\u68f5\u6811\u6765\u751f\u6210\u6700\u7ec8\u6a21\u578b\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u8bf7\u8bb0\u4f4f\uff0c\u62df\u5408\u66f4\u591a\u7684\u6811\u5c06\u9700\u8981\u66f4\u591a\u7684\u8ba1\u7b97\u80fd\u529b\uff0c\u8fd9\u53ef\u80fd\u4f1a\u4e5f\u53ef\u80fd\u4e0d\u4f1a\u6210\u4e3a\u95ee\u9898\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u6570\u636e\u96c6\u7684\u5927\u5c0f\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u888b\u5916\u9519\u8bef\u4f30\u8ba1<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4e8b\u5b9e\u8bc1\u660e\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u4e0d\u4f9d\u8d56<a href=\"https:\/\/statorials.org\/cn\/k\u6298\u4ea4\u53c9\u9a8c\u8bc1\/\" target=\"_blank\" rel=\"noopener noreferrer\">k \u6298\u4ea4\u53c9\u9a8c\u8bc1\u7684\u60c5\u51b5<\/a>\u4e0b\u8ba1\u7b97 bagged \u6a21\u578b\u7684\u6d4b\u8bd5\u8bef\u5dee\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u539f\u56e0\u662f\u6bcf\u4e2a bootstrap \u6837\u672c\u53ef\u4ee5\u663e\u793a\u5305\u542b\u539f\u59cb\u6570\u636e\u96c6\u4e2d\u5927\u7ea6 2\/3 \u7684\u89c2\u6d4b\u503c\u3002\u5176\u4f59\u4e09\u5206\u4e4b\u4e00\u672a\u7528\u4e8e\u62df\u5408\u888b\u88c5\u6811\u7684\u89c2\u6d4b\u503c\u79f0\u4e3a<strong>\u888b\u5916 (OOB) \u89c2\u6d4b\u503c<\/strong>\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ece OOB \u89c2\u6d4b\u503c\u7684\u6bcf\u68f5\u6811\u4e2d\u83b7\u53d6\u5e73\u5747\u9884\u6d4b\u6765\u9884\u6d4b\u539f\u59cb\u6570\u636e\u96c6\u4e2d\u7b2c i \u4e2a\u89c2\u6d4b\u503c\u7684\u503c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u5bf9\u539f\u59cb\u6570\u636e\u96c6\u4e2d\u7684\u6240\u6709<em>n \u4e2a<\/em>\u89c2\u6d4b\u503c\u8fdb\u884c\u9884\u6d4b\uff0c\u4ece\u800c\u8ba1\u7b97\u9519\u8bef\u7387\uff0c\u8fd9\u662f\u6d4b\u8bd5\u8bef\u5dee\u7684\u6709\u6548\u4f30\u8ba1\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u4f30\u8ba1\u6d4b\u8bd5\u8bef\u5dee\u7684\u4f18\u70b9\u662f\u5b83\u6bd4 k \u500d\u4ea4\u53c9\u9a8c\u8bc1\u5feb\u5f97\u591a\uff0c\u7279\u522b\u662f\u5f53\u6570\u636e\u96c6\u5f88\u5927\u65f6\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u4e86\u89e3\u9884\u6d4b\u53d8\u91cf\u7684\u91cd\u8981\u6027<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u8bf7\u8bb0\u4f4f\uff0c\u51b3\u7b56\u6811\u7684\u4f18\u70b9\u4e4b\u4e00\u662f\u5b83\u4eec\u6613\u4e8e\u89e3\u91ca\u548c\u53ef\u89c6\u5316\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5f53\u6211\u4eec\u4f7f\u7528\u88c5\u888b\u65f6\uff0c\u6211\u4eec\u4e0d\u518d\u80fd\u591f\u89e3\u91ca\u6216\u53ef\u89c6\u5316\u5355\u4e2a\u6811\uff0c\u56e0\u4e3a\u6700\u7ec8\u7684\u88c5\u888b\u6a21\u578b\u662f\u5bf9\u8bb8\u591a\u4e0d\u540c\u6811\u8fdb\u884c\u5e73\u5747\u7684\u7ed3\u679c\u3002\u6211\u4eec\u4ee5\u727a\u7272\u53ef\u89e3\u91ca\u6027\u4e3a\u4ee3\u4ef7\u6765\u83b7\u5f97\u9884\u6d4b\u51c6\u786e\u6027\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u7136\u800c\uff0c\u6211\u4eec\u4ecd\u7136\u53ef\u4ee5\u901a\u8fc7\u8ba1\u7b97\u7531\u4e8e\u7ed9\u5b9a\u9884\u6d4b\u53d8\u91cf\u7684\u5206\u5e03\uff08\u5728\u6240\u6709<em>B<\/em>\u6811\u4e0a\u5e73\u5747\uff09\u800c\u5bfc\u81f4\u7684 RSS\uff08\u6b8b\u5dee\u5e73\u65b9\u548c\uff09\u7684\u603b\u51cf\u5c11\u91cf\u6765\u4e86\u89e3\u6bcf\u4e2a\u9884\u6d4b\u53d8\u91cf\u7684\u91cd\u8981\u6027\u3002\u503c\u8d8a\u5927\uff0c\u9884\u6d4b\u53d8\u91cf\u8d8a\u91cd\u8981\u3002<\/span> <\/p>\n<figure id=\"attachment_12115\" aria-describedby=\"caption-attachment-12115\" style=\"width: 411px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-12115\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/sac1.png\" alt=\"bagging \u6a21\u578b\u7684\u53d8\u91cf\u91cd\u8981\u6027\u56fe\" width=\"411\" height=\"380\" srcset=\"\" sizes=\"auto, \"><figcaption id=\"caption-attachment-12115\" class=\"wp-caption-text\"><span style=\"color: #000000;\"><strong>\u53d8\u91cf\u91cd\u8981\u6027\u56fe\u8868\u7684\u793a\u4f8b\u3002<\/strong><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">\u7c7b\u4f3c\u5730\uff0c\u5bf9\u4e8e\u5206\u7c7b\u6a21\u578b\uff0c\u6211\u4eec\u53ef\u4ee5\u8ba1\u7b97\u7531\u4e8e\u7ed9\u5b9a\u9884\u6d4b\u53d8\u91cf\u7684\u5206\u5e03\u800c\u5bfc\u81f4\u7684\u603b\u57fa\u5c3c\u6307\u6570\u51cf\u5c11\uff08\u5728\u6240\u6709<em>B<\/em>\u6811\u4e0a\u53d6\u5e73\u5747\u503c\uff09\u3002\u503c\u8d8a\u5927\uff0c\u9884\u6d4b\u53d8\u91cf\u8d8a\u91cd\u8981\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u56e0\u6b64\uff0c\u867d\u7136\u6211\u4eec\u65e0\u6cd5\u51c6\u786e\u89e3\u91ca\u6700\u7ec8\u7684\u6574\u4f53\u6a21\u578b\uff0c\u4f46\u6211\u4eec\u4ecd\u7136\u53ef\u4ee5\u4e86\u89e3\u6bcf\u4e2a\u9884\u6d4b\u53d8\u91cf\u5728\u9884\u6d4b\u54cd\u5e94\u65f6\u7684\u91cd\u8981\u6027\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u8d85\u8d8a\u88c5\u888b<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">bagging \u7684\u4f18\u70b9\u5728\u4e8e\uff0c\u4e0e\u5355\u4e2a\u51b3\u7b56\u6811\u76f8\u6bd4\uff0c\u5b83\u901a\u5e38\u53ef\u4ee5\u63d0\u9ad8\u6d4b\u8bd5\u9519\u8bef\u7387\u3002<\/span><\/p>\n<p data-slot-rendered-dynamic=\"true\"><span style=\"color: #000000;\">\u7f3a\u70b9\u662f\uff0c\u5982\u679c\u6570\u636e\u96c6\u4e2d\u5b58\u5728\u975e\u5e38\u5f3a\u7684\u9884\u6d4b\u53d8\u91cf\uff0c\u5219\u888b\u88c5\u6811\u96c6\u5408\u7684\u9884\u6d4b\u53ef\u80fd\u4f1a\u9ad8\u5ea6\u76f8\u5173\u3002<\/span><\/p>\n<p data-slot-rendered-dynamic=\"true\"><span style=\"color: #000000;\">\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5927\u591a\u6570\u6216\u6240\u6709\u888b\u88c5\u6811\u5c06\u4f7f\u7528\u6b64\u9884\u6d4b\u5668\u8fdb\u884c\u7b2c\u4e00\u6b21\u5206\u5272\uff0c\u4ece\u800c\u4ea7\u751f\u5f7c\u6b64\u76f8\u4f3c\u4e14\u5177\u6709\u9ad8\u5ea6\u76f8\u5173\u9884\u6d4b\u7684\u6811\u3002<\/span><\/p>\n<p data-slot-rendered-dynamic=\"true\"><span style=\"color: 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