<\/title><br \/>\n<meta charset=\"utf-8\"><br \/>\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0,viewport-fit=cover\"><\/p>\n<style>\n*{margin:0;padding:0}html{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%;line-height:1.6}img{z-index:999;position:relative;max-width:100%;margin:10px 0;}body{letter-spacing:.034em}h1,h2,h3,h4,h5,h6{font-weight:400;font-size:16px}a{color:#576b95;text-decoration:none;-webkit-tap-highlight-color:rgba(0,0,0,0)}td,th{word-wrap:break-word;padding:5px 10px;border:1px solid #DDD;}table{margin-bottom:10px;border-collapse:collapse;display:table;width:100%!important;}.appmsg_skin_default .rich_media_area_primary{background-color:#fff}.appmsg_skin_default .rich_media_area_primary .weui-loadmore_line .weui-loadmore__tips{background-color:#fff}.rich_media_area_primary{padding:20px 16px 12px;background-color:#fafafa}@media (max-width:375px){.rich_media_area_primary{padding:20px 60px 15px 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#33ab01;margin-right:5px;}.ad{text-decoration:none;color:#d6d4d4;font-size:12px;}.msgBodyReply{padding-top:5px;}.userName span{float:right;color:#afafaf;font-size:14px;}code{text-align:left;font-size:14px;display:block;white-space:pre;display:-webkit-box;display:-webkit-flex;display:flex;position:relative;}.code-snippet__fix{font-size:14px;margin:10px 0;display:block;color:#333;position:relative;background-color:rgba(0,0,0,0.03);border:1px solid #f0f0f0;border-radius:2px;display:-webkit-box;display:-webkit-flex;display:flex;padding-left:25px;line-height:26px}.code-snippet__fix code{text-align:left;font-size:14px;display:block;white-space:pre;display:-webkit-box;display:-webkit-flex;display:flex;position:relative;font-family:Consolas,\"Liberation 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0;align-items:center}.flex_bd{padding-left:14px;}.account_nickname{display:inline-block;vertical-align:middle;line-height:1.2;color:#576b95;font-size:14px}.account_desc{overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:1;color:rgba(0,0,0,0.3);font-size:14px;line-height:1.2;padding-top:.4em}.msg_source_url{text-align:left;word-break:break-all;margin-top:20px;}.msg_source_url a{padding-right:10px;}.msg_source_url .url_text{color:#a8a8a8;}.video-desc{font-size:14px;margin-top:15px;color:#6c6c6c;}.msg_source_url{text-align:left;}.original_primary_card_tips{color:rgba(0,0,0,0.3);line-height:1.4;font-size:15px;}.weui-flex__item{margin-bottom:20px;padding:20px 16px;margin-top:16px;line-height:1.4;align-items:center;background-color:#f7f7f7;border-radius:8px;position:relative;}.original_primary_desc{color:rgba(0,0,0,0.5);font-size:14px;padding-top:4px;width:auto;overflow:hidden;text-overflow:ellipsis;}.msgBodyReplyList{border-top:1px solid #e1e1e1;margin-top:10px;}.msgBodyReplyListTop{border-top:0;}.reply_like_num{float:right;font-size:14px;color:#c7c7c7;}.msgData{margin-top:20px;color:#626262;}.msgData span{font-size:14px;padding-right:15px;}.msgData .likes{float:right;padding-right:0;}.js_text_content p{font-size:18px;}.rich_media_meta_link{font-size:15px;}blockquote {padding-left: 10px;border-left: 3px solid #dbdbdb;color: rgba(0,0,0,0.5);font-size: 15px;padding-top: 4px;margin: 1em 0;}.video_iframe{width:500px;height:400px;}.blockquote_info{color:#b5b5b5;margin-top:10px;}#copyright_logo{color:#bdbdbd;}.rich_media_meta_list{margin-bottom:10px;}.reprint{background:#efefef;border-radius:5px;padding:8px;color:#1f1f1f;}.reprint a{word-break:break-all;}.topic{color:#8e8e8e;background:#f7f7f7;border-radius:5px;padding:10px 8px;}.topic a{padding-right:5px;}.topic p{margin-bottom:5px;}\n<\/style>\n<link href=\"https:\/\/www.juyifx.cn\/config\/css\/wxArticle.css\" rel=\"stylesheet\"\/>\n<\/head><script>\nvar 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href=\"javascript:void(0);\" class=\"wx_tap_link js_wx_tap_highlight weui-wa-hotarea\" id=\"js_name\">\u751f\u4fe1\u679c <\/a><\/span><em id=\"publish_time\" class=\"rich_media_meta rich_media_meta_text\">2023-08-22 19:00:12<\/em><\/div>\n<p><content><\/p>\n<div class=\"reprint\">\n<p>\u8f6c\u81ea\u516c\u4f17\u53f7\uff1a\u751f\u4fe1\u82b1<br \/><a href=\"http:\/\/mp.weixin.qq.com\/s?__biz=MzkzODUxNjcwMA==&mid=2247484228&idx=1&sn=3df722ea1fff28ef9f6a3419187f8296\" target=\"_blank\" title=\"\u9605\u8bfb\u539f\u6587\" rel=\"noopener\">http:\/\/mp.weixin.qq.com\/s?__biz=MzkzODUxNjcwMA==&mid=2247484228&idx=1&sn=3df722ea1fff28ef9f6a3419187f8296<\/a><\/p>\n<\/div>\n<section style=\"font-size: 14px;margin-bottom: 24px;\">\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;align-self: flex-start;flex: 0 0 auto;background-color: rgb(65, 128, 216);\">\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;padding-left: 12px;\">\n<section style=\"text-align: justify;color: rgb(255, 255, 255);\" powered-by=\"xiumi.us\">\n<p><strong>\u70b9\u51fb\u84dd\u5b57 \u5173\u6ce8\u6211\u4eec<\/strong><\/p>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\">\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: top;width: 34px;align-self: flex-start;flex: 0 0 auto;height: auto;overflow: hidden;margin-right: -17px;\">\n<section style=\"transform: rotateZ(60deg);\" powered-by=\"xiumi.us\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;text-align: center;\">\n<section style=\"width: 100%;height: 5px;background-color: rgb(255, 255, 255);\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: top;width: 34px;align-self: flex-start;flex: 0 0 auto;height: auto;overflow: hidden;margin-right: -17px;\">\n<section style=\"transform: rotateZ(60deg);\" powered-by=\"xiumi.us\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;text-align: center;\">\n<section style=\"width: 100%;height: 5px;background-color: rgb(201, 229, 70);\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: top;width: 34px;align-self: flex-start;flex: 0 0 auto;height: auto;overflow: hidden;\">\n<section style=\"transform: rotateZ(60deg);\" powered-by=\"xiumi.us\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;text-align: center;\">\n<section style=\"width: 100%;height: 5px;background-color: rgb(255, 255, 255);\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 0em;text-wrap: wrap;\"><span style=\"text-indent: 2em;\">\u5927\u5bb6\u597d\uff0c\u6211\u662f\u5c0f\u82b1\uff0c\u4e00\u4e2a\u5bf9\u751f\u7269\u4fe1\u606f\u5b66\u5145\u6ee1\u70ed\u60c5\u7684\u5c0f\u4f19\u4f34\u3002\u4eca\u5929\uff0c\u6211\u8981\u548c\u5927\u5bb6\u5206\u4eab\u4e00\u9879\u4ee4\u4eba\u6fc0\u52a8\u7684\u6280\u672f\u2014\u2014\u4f7f\u7528R\u8bed\u8a00\u4e2d\u7684\u795e\u5947\u5305randomForest\u8fdb\u884c\u75be\u75c5\u9884\u6d4b\u3002\u901a\u8fc7\u8fd9\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u6570\u636e\u7684\u529b\u91cf\u6210\u4e3a\u771f\u6b63\u7684\u201c\u9884\u6d4b\u5927\u5e08\u201d\u3002\u8fd8\u7b49\u4ec0\u4e48\u5462\uff1f\u5feb\u6765\u63a2\u7d22\u8fd9\u4e2a\u795e\u5947\u7684\u9886\u57df\u5427\uff01<\/span><br \/><\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u75be\u75c5\u9884\u6d4b\u4e00\u76f4\u662f\u533b\u5b66\u9886\u57df\u7684\u91cd\u5927\u6311\u6218\uff0c\u800c\u73b0\u4ee3\u751f\u7269\u4fe1\u606f\u5b66\u6280\u672f\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u7a81\u7834\u7684\u673a\u4f1a\u3002randomForest\u5305\u7684\u51fa\u73b0\u4e3a\u6211\u4eec\u5e26\u6765\u4e86\u4e00\u79cd\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u9884\u6d4b\u75be\u75c5\u7684\u53d1\u751f\u548c\u53d1\u5c55\u8d8b\u52bf\u3002<\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">randomForest\u662f\u4e00\u79cd\u96c6\u6210\u5b66\u4e60\u7b97\u6cd5\uff0c\u57fa\u4e8e\u51b3\u7b56\u6811\u7684\u601d\u60f3\u3002\u8fd9\u4e2a\u7b97\u6cd5\u7684\u5965\u5999\u4e4b\u5904\u5728\u4e8e\uff0c\u5b83\u901a\u8fc7\u7ec4\u5408\u591a\u4e2a\u51b3\u7b56\u6811\u7684\u9884\u6d4b\u7ed3\u679c\u6765\u63d0\u9ad8\u9884\u6d4b\u7684\u51c6\u786e\u6027\u3002\u5c31\u50cf\u68ee\u6797\u4e2d\u7684\u6811\u6728\u4e00\u6837\uff0c\u6bcf\u68f5\u51b3\u7b56\u6811\u90fd\u6709\u81ea\u5df1\u7684\u7279\u70b9\uff0c\u800c\u96c6\u6210\u540e\u7684\u7ed3\u679c\u5374\u6bd4\u5355\u4e2a\u6811\u66f4\u53ef\u9760\u3002<\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u5728R\u4e2d\uff0crandomForest\u5305\u63d0\u4f9b\u4e86\u591a\u4e2a\u51fd\u6570\u7528\u4e8e\u6784\u5efa\u548c\u5206\u6790\u968f\u673a\u68ee\u6797\u6a21\u578b\u3002\u4e0b\u9762\u662frandomForest\u5305\u4e2d\u5e38\u7528\u7684\u51fd\u6570\u53ca\u5176\u53c2\u6570\u7684\u89e3\u91ca\uff1a<\/p>\n<\/section>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">randomForest(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u8fd9\u662f\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b\u7684\u4e3b\u8981\u51fd\u6570\u3002\u5b83\u7684\u4e3b\u8981\u53c2\u6570\u5305\u62ec\uff1a<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">x: \u81ea\u53d8\u91cf\u77e9\u9635\u6216\u6570\u636e\u6846\uff0c\u5305\u542b\u7528\u4e8e\u8bad\u7ec3\u6a21\u578b\u7684\u7279\u5f81\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">y: \u56e0\u53d8\u91cf\u5411\u91cf\uff0c\u5305\u542b\u4e0e\u81ea\u53d8\u91cf\u76f8\u5bf9\u5e94\u7684\u76ee\u6807\u53d8\u91cf\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">ntree: \u51b3\u7b56\u6811\u7684\u6570\u91cf\uff0c\u5373\u968f\u673a\u68ee\u6797\u4e2d\u6811\u7684\u4e2a\u6570\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">mtry: \u6bcf\u68f5\u51b3\u7b56\u6811\u4e2d\u968f\u673a\u9009\u62e9\u7684\u7279\u5f81\u6570\u91cf\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">importance: \u662f\u5426\u8ba1\u7b97\u53d8\u91cf\u91cd\u8981\u6027\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">…: \u5176\u4ed6\u53c2\u6570\u7528\u4e8e\u63a7\u5236\u6a21\u578b\u6784\u5efa\u8fc7\u7a0b\uff0c\u5982\u8282\u70b9\u5206\u88c2\u7684\u51c6\u5219\u3001\u6837\u672c\u62bd\u6837\u65b9\u5f0f\u7b49\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">importance(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u5df2\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b\u4e2d\u7684\u53d8\u91cf\u91cd\u8981\u6027\u3002<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">rf: \u968f\u673a\u68ee\u6797\u6a21\u578b\u5bf9\u8c61\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">type: \u91cd\u8981\u6027\u5ea6\u91cf\u7684\u7c7b\u578b\uff0c\u5982MeanDecreaseAccuracy\uff08\u5e73\u5747\u51c6\u786e\u7387\u4e0b\u964d\uff09\u3001MeanDecreaseGini\uff08\u5e73\u5747Gini\u6307\u6570\u4e0b\u964d\uff09\u7b49\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">predict(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u7528\u4e8e\u5bf9\u65b0\u7684\u6570\u636e\u8fdb\u884c\u9884\u6d4b\u6216\u63a8\u65ad\u3002<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">rf: \u968f\u673a\u68ee\u6797\u6a21\u578b\u5bf9\u8c61\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">newdata: \u5305\u542b\u8981\u8fdb\u884c\u9884\u6d4b\u7684\u65b0\u6570\u636e\u7684\u77e9\u9635\u6216\u6570\u636e\u6846\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">plot(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u7528\u4e8e\u7ed8\u5236\u968f\u673a\u68ee\u6797\u6a21\u578b\u7684\u56fe\u5f62\uff0c\u5982\u53d8\u91cf\u91cd\u8981\u6027\u56fe\u3001\u8bef\u5dee\u56fe\u7b49\u3002<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">x: \u968f\u673a\u68ee\u6797\u6a21\u578b\u5bf9\u8c61\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">…: \u5176\u4ed6\u53c2\u6570\u7528\u4e8e\u63a7\u5236\u56fe\u5f62\u7684\u5916\u89c2\u548c\u5e03\u5c40\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">\u8fd9\u4e9b\u662frandomForest\u5305\u4e2d\u7684\u4e00\u4e9b\u5e38\u7528\u51fd\u6570\u548c\u53c2\u6570\u3002\u5f53\u4f7f\u7528\u8fd9\u4e9b\u51fd\u6570\u6784\u5efa\u548c\u5206\u6790\u968f\u673a\u68ee\u6797\u6a21\u578b\u65f6\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u95ee\u9898\u548c\u9700\u8981\u6765\u8c03\u6574\u53c2\u6570\uff0c\u4ee5\u83b7\u5f97\u6700\u4f73\u7684\u7ed3\u679c\u548c\u7406\u89e3\u6a21\u578b\u7684\u5173\u952e\u7279\u5f81\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 2em;text-wrap: wrap;\"><br \/><\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u4f7f\u7528randomForest\u5305\u8fdb\u884c\u7cd6\u5c3f\u75c5\u9884\u6d4b\u7684\u7b80\u5355\u793a\u4f8b\uff1a<\/p>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p>\u4ee3\u7801\u5177\u4f53\u5305\u62ec\uff1a<\/p>\n<p><span style=\"color: rgb(16, 116, 231);\"><strong>Step1 \u5bfc\u5165\u6570\u636e\u96c6\u4ee5\u53ca\u6570\u636e\u9884\u5904\u7406<\/strong><\/span><\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u8fd9\u91cc\u7684\"inputdata.txt\"\u662f\u81ea\u884c\u51c6\u5907\u7684\u672c\u5730\u6587\u4ef6\uff0c\u5c0f\u82b1\u7ed9\u5927\u5bb6\u9644\u5728\u6700\u540e\u3002<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 1.\u5bfc\u5165\u6570\u636e\u96c6\u4ee5\u53ca\u6570\u636e\u9884\u5904\u7406<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u5b89\u88c5\u548c\u52a0\u8f7drandomForest\u5305<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#install.packages(\"randomForest\")<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">library(randomForest)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u5bfc\u5165\u6570\u636e\u96c6<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">data <- read.table(file = <span class=\"code-snippet__string\">\"D:\/wanglab\/life\/ziyuan\/20230628\/inputdata.txt\"<\/span>,header = <span class=\"code-snippet__built_in\">T<\/span>) <span class=\"code-snippet__comment\"># \u66ff\u6362\u4e3a\u5b9e\u9645\u6570\u636e\u96c6\u6587\u4ef6\u7684\u8def\u5f84<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">data$diabetes <- as.factor(data$diabetes)<\/span><\/code><code><span class=\"code-snippet_outer\">head(data)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><br \/><\/p>\n<\/section>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u8f93\u5165\u6570\u636e\u5c55\u793a<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.21863117870722434\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/1_jJTicvDibkIcrS9QM9QIQ5VP3oDq1A.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbGy8ia47KFAxjeGoaEpqmVKD9ibTiajJTicvDibkIcrS9QM9QIQ5VP3oDq1A\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"526\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u5212\u5206\u6570\u636e\u96c6\u4e3a\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">set.seed(<span class=\"code-snippet__number\">123<\/span>) <span class=\"code-snippet__comment\"># \u8bbe\u7f6e\u968f\u673a\u79cd\u5b50\uff0c\u4fdd\u8bc1\u7ed3\u679c\u53ef\u590d\u73b0<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">indices <- sample(<span class=\"code-snippet__number\">1<\/span>:nrow(data), nrow(data)*<span class=\"code-snippet__number\">0.8<\/span>) <span class=\"code-snippet__comment\"># 80%\u7684\u6570\u636e\u7528\u4e8e\u8bad\u7ec3\uff0c20%\u7684\u6570\u636e\u7528\u4e8e\u6d4b\u8bd5<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">trainingset <- data[indices, ]<\/span><\/code><code><span class=\"code-snippet_outer\">testingset <- data[-indices, ]<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong><span style=\"color: rgb(16, 116, 231);\">Step2\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b<\/span><\/strong><\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 2.\u521b\u5efa\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 2.\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">rf_model <- randomForest(diabetes ~ ., data = trainingset, ntree = <span class=\"code-snippet__number\">500<\/span>,mtry=<span class=\"code-snippet__number\">2<\/span>)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u67e5\u770b\u6a21\u578b\u7ed3\u679c<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">print(rf_model)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u67e5\u770b\u6a21\u578b\u7ed3\u679c\u622a\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3505747126436782\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/2_9xGVItC397giaiayoviaUiaLAEUUww.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbMzRYcibOgm4BicMDbwhMgDSg8ZAKsd9xGVItC397giaiayoviaUiaLAEUUww\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"522\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u53d8\u91cf\u91cd\u8981\u6027\u56fe<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">varImpPlot(rf_model)<\/span><\/code><code><span class=\"code-snippet_outer\">rf_model$importance<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u53d8\u91cf\u91cd\u8981\u6027\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;width: 100%;height: auto;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.7053140096618358\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/3_QOIuUmDIbHGiaV5e0eo1cguPuia1BQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbUh7M5W12bJbeGwjibwn3PmINvrQQOIuUmDIbHGiaV5e0eo1cguPuia1BQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"207\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.8574660633484162\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/4_Agj8zGo2uWbDNfuEHT96wibXZNElsQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDb4yY7DzwG0EW98WjVTiczGcLFJ0Agj8zGo2uWbDNfuEHT96wibXZNElsQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"442\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p>randomForest\u6a21\u578b\u7684\u7ed3\u679c\u5c06\u663e\u793a\u51fa\u91cd\u8981\u7684\u53d8\u91cf\u3001\u6bcf\u4e2a\u53d8\u91cf\u7684\u91cd\u8981\u6027\u6307\u6807\u4ee5\u53ca\u9884\u6d4b\u51c6\u786e\u6027\u7684\u5ea6\u91cf\u3002\u8fd9\u4e9b\u4fe1\u606f\u6709\u52a9\u4e8e\u6211\u4eec\u7406\u89e3\u54ea\u4e9b\u56e0\u7d20\u5bf9\u4e8e\u75be\u75c5\u7684\u9884\u6d4b\u8d77\u7740\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u7ed8\u5236\u8bef\u5dee\u56fe<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">plot(rf_model, main = <span class=\"code-snippet__string\">\"Random Forest Model Error\"<\/span>, type = <span class=\"code-snippet__string\">\"o\"<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u8bef\u5dee\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.2257001647446457\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/5_cF7C4huOicyw0qSK6dibOqD9BweX0Q.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbHeNfdqIp41J0mEtVDiaetvfGAqFcF7C4huOicyw0qSK6dibOqD9BweX0Q\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"607\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u5728\u8bef\u5dee\u56fe\u4e2d\uff0c\u6a2a\u8f74\u8868\u793a\u968f\u673a\u68ee\u6797\u4e2d\u7684\u6bcf\u4e2a\u51b3\u7b56\u6811\uff0c\u7eb5\u8f74\u8868\u793a\u8bef\u5dee\u6216\u635f\u5931\u5ea6\u91cf\u3002\u6bcf\u4e2a\u70b9\u4ee3\u8868\u4e00\u4e2a\u51b3\u7b56\u6811\u6a21\u578b\u7684\u8bef\u5dee\u6216\u635f\u5931\u503c\uff0c\u800c\u6574\u4f53\u7684\u7ebf\u6761\u6216\u66f2\u7ebf\u8868\u793a\u6240\u6709\u51b3\u7b56\u6811\u6a21\u578b\u7684\u5e73\u5747\u8bef\u5dee\u6216\u635f\u5931\u3002\u8bef\u5dee\u56fe\u4e2d\u7684\u4e0d\u540c\u989c\u8272\u7ebf\u6761\u4ee3\u8868\u4e86\u4e0d\u540c\u6837\u672c\u96c6\u751f\u6210\u7684\u6a21\u578b\u7684\u9884\u6d4b\u8bef\u5dee\u3002\u8fd9\u4e9b\u4e0d\u540c\u989c\u8272\u7684\u7ebf\u6761\u8868\u793a\u968f\u673a\u68ee\u6797\u4e2d\u7684\u4e0d\u540c\u51b3\u7b56\u6811\u6a21\u578b\u6216\u5b50\u6a21\u578b\u7684\u5e73\u5747\u8bef\u5dee\u503c\u3002\u4e0d\u540c\u989c\u8272\u7684\u7ebf\u6761\u8d8b\u4e8e\u5e73\u884c\u4e14\u76f8\u4e92\u9760\u8fd1\uff0c\u8868\u793a\u968f\u673a\u68ee\u6797\u4e2d\u7684\u5b50\u6a21\u578b\u5177\u6709\u76f8\u4f3c\u7684\u8bef\u5dee\u6c34\u5e73\uff0c\u6a21\u578b\u7684\u9884\u6d4b\u7ed3\u679c\u6bd4\u8f83\u7a33\u5b9a\u3002<\/p>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u7ed8\u5236\u5355\u68f5\u51b3\u7b56\u6811<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">library(rpart.plot)<\/span><\/code><code><span class=\"code-snippet_outer\">plot(rf_model$forest[[<span class=\"code-snippet__number\">1<\/span>]], uniform = <span class=\"code-snippet__literal\">TRUE<\/span>, main = <span class=\"code-snippet__string\">\"Decision Tree\"<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u5355\u68f5\u51b3\u7b56\u6811<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.2257001647446457\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/6_uicOTSiaCKI9we6RqQhTiaRP8mZdog.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbsELZ22hGDu8GuJx8orIDF4yx9F8uicOTSiaCKI9we6RqQhTiaRP8mZdog\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"607\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong><span style=\"color: rgb(16, 116, 231);\">Step3 \u7ed8\u5236AUC\u66f2\u7ebf\u8bc4\u4f30\u6a21\u578b<\/span><\/strong><\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 3.\u7ed8\u5236AUC\u66f2\u7ebf\u8bc4\u4f30\u6a21\u578b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u5bf9\u6d4b\u8bd5\u96c6\u8fdb\u884c\u9884\u6d4b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">pre_ran <- predict(rf_model,newdata=testingset)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u5c06\u771f\u5b9e\u503c\u548c\u9884\u6d4b\u503c\u6574\u5408\u5230\u4e00\u8d77<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">obs_p_ran = data.frame(prob=pre_ran,obs=testingset$diabetes)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u8f93\u51fa\u6df7\u6dc6\u77e9\u9635<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">table(testingset$diabetes,pre_ran,dnn=<span class=\"code-snippet__built_in\">c<\/span>(<span class=\"code-snippet__string\">\"\u771f\u5b9e\u503c\"<\/span>,<span class=\"code-snippet__string\">\"\u9884\u6d4b\u503c\"<\/span>))<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u7ed8\u5236ROC\u66f2\u7ebf<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">ran_roc <- roc(testingset$diabetes,<span class=\"code-snippet__built_in\">as.numeric<\/span>(pre_ran)<\/span><\/code><code><span class=\"code-snippet_outer\">plot(ran_roc, print.auc=<span class=\"code-snippet__literal\">TRUE<\/span>, auc.polygon=<span class=\"code-snippet__literal\">TRUE<\/span>, grid=<span class=\"code-snippet__built_in\">c<\/span>(<span class=\"code-snippet__number\">0.1<\/span>, <span class=\"code-snippet__number\">0.2<\/span>),grid.col=<span class=\"code-snippet__built_in\">c<\/span>(<span class=\"code-snippet__string\">\"green\"<\/span>, <span class=\"code-snippet__string\">\"red\"<\/span>), max.auc.polygon=<span class=\"code-snippet__literal\">TRUE<\/span>,auc.polygon.col=<span class=\"code-snippet__string\">\"skyblue\"<\/span>, print.thres=<span class=\"code-snippet__literal\">TRUE<\/span>,main=<span class=\"code-snippet__string\">'\u968f\u673a\u68ee\u6797\u6a21\u578bROC\u66f2\u7ebf,mtry=2,ntree=500'<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>AUC\u66f2\u7ebf\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.2257001647446457\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/7_dkxryl6iaMetJbwsQibMANbYjicSmg.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDb9BRGDCRmqk1eXDdZQJu6vZeia58hdkxryl6iaMetJbwsQibMANbYjicSmg\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"607\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u6ce8\uff1a<\/span><\/p>\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\"># \u8bf7\u786e\u4fdd\u5c06\u8def\u5f84”inputdata.txt”\u66ff\u6362\u4e3a\u5b9e\u9645\u6570\u636e\u96c6\u6587\u4ef6\u7684\u8def\u5f84\uff0c\u5e76\u6839\u636e\u9700\u8981\u8c03\u6574\u6a21\u578b\u53c2\u6570\u548c\u5176\u4ed6\u914d\u7f6e\u3002<\/span><\/p>\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\"># \u5728\u7ed8\u5236AUC\u66f2\u7ebf\u4e4b\u524d\uff0c\u786e\u4fdd\u60a8\u7684\u6a21\u578b\u8f93\u51fa\u7684\u662f\u9884\u6d4b\u7684\u6982\u7387\u503c\uff0c\u800c\u4e0d\u662f\u7c7b\u522b\u6807\u7b7e\u3002<\/span><\/p>\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u5b89\u88c5\u5e76\u52a0\u8f7d\u4e86randomForest\u5305\u3002\u7136\u540e\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u793a\u4f8b\u6570\u636e\u96c6\uff0c\u5176\u4e2d\u5305\u542b\u5e74\u9f84\uff08age\uff09\u548c\u4f53\u8d28\u6307\u6570\uff08bmi\uff09\u4f5c\u4e3a\u81ea\u53d8\u91cf\uff0c\u75be\u75c5\u60c5\u51b5\uff08disease\uff09\u4f5c\u4e3a\u56e0\u53d8\u91cf\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f7f\u7528randomForest\u51fd\u6570\u6784\u5efa\u4e86\u4e00\u4e2a\u75be\u75c5\u9884\u6d4b\u6a21\u578b\uff0c\u5176\u4e2d\u81ea\u53d8\u91cf\u901a\u8fc7~\u7b26\u53f7\u4e0e\u56e0\u53d8\u91cf\u76f8\u8fde\u3002\u6700\u540e\uff0c\u6211\u4eec\u901a\u8fc7\u6253\u5370rf_model\u6765\u67e5\u770b\u9884\u6d4b\u7ed3\u679c\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 98%;vertical-align: top;align-self: flex-start;flex: 0 0 auto;height: auto;border-style: solid;border-width: 2px;border-color: rgb(160, 160, 160);padding: 27px;\">\n<section style=\"text-align: justify;line-height: 1.6;letter-spacing: 0px;padding-right: 6px;padding-left: 6px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 2em;text-wrap: wrap;\">\u73b0\u5728\uff0c\u6211\u60f3\u544a\u8bc9\u5927\u5bb6\u4e00\u4e2a\u6709\u8da3\u7684\u4e8b\u5b9e\uff1a\u201c\u4f7f\u7528randomForest\u5305\u8fdb\u884c\u75be\u75c5\u9884\u6d4b\uff0c\u5c31\u50cf\u5728\u68ee\u6797\u4e2d\u5bfb\u627e\u79d8\u5bc6\u8def\u5f84\uff0c\u800c\u8fd9\u4e2a\u8def\u5f84\u5c06\u5e26\u9886\u6211\u4eec\u63ed\u5f00\u75be\u75c5\u7684\u9762\u7eb1\u3002\u201d\u662f\u4e0d\u662f\u8ba9\u4f60\u5fc3\u52a8\u4e0d\u5df2\u5462\uff1f<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">\u6700\u540e\uff0c\u6211\u60f3\u5f3a\u8c03\u4e00\u4e0b\u4f7f\u7528\u516c\u4f17\u53f7\u5e73\u53f0\u8fdb\u884c\u6570\u636e\u5206\u6790\u7684\u4fbf\u5229\u6027\u3002\u4e91\u751f\u4fe1\u5e73\u53f0\uff08http:\/\/www.biocloudservice.com\/home.html\uff09<span style=\"color: rgb(62, 62, 62);\">\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7b80\u5355\u3001\u65b9\u4fbf\u3001\u5feb\u901f\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u5206\u4eab\u7ed3\u679c\u3002\u4f60\u53ea\u9700\u8f7b\u677e\u70b9\u51fb\uff0c\u5373\u53ef\u638c\u63e1\u6570\u636e\u7684\u5965\u79d8\uff0c\u6210\u4e3a\u75be\u75c5\u9884\u6d4b\u7684\u9ad8\u624b\uff01<\/span> <\/p>\n<p style=\"text-indent: 2em;text-wrap: 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data={\"mp\":\"\u751f\u4fe1\u679c\",\"title\":\"\u89e3\u5bc6\u75be\u75c5\u9884\u6d4b\u7684\u795e\u5947\u4e4b\u529b\uff01\u7528R\u5305randomForest\u6210\u4e3a\u201c\u9884\u6d4b\u5927\u5e08\u201d\",\"time\":\"2023-08-22 19:00:12\",\"timeStamp\":\"1692702012\"};\n<\/script><br \/>\n<body><\/p>\n<div class=\"rich_media\">\n<h1 class=\"rich_media_title\" id=\"activity-name\"><a href=\"http:\/\/mp.weixin.qq.com\/s?__biz=Mzg3OTg3MjQyNg==&mid=2247491567&idx=5&sn=13e6237d8cbc69c0ccb7d61aa92490f8&chksm=cf7c8f2af80b063c90df0fd2289255751fc9c7566f6d8e0a34d2338ef6971ca8012dd203818b#rd\" target=\"_blank\" rel=\"noopener\">\u89e3\u5bc6\u75be\u75c5\u9884\u6d4b\u7684\u795e\u5947\u4e4b\u529b\uff01\u7528R\u5305randomForest\u6210\u4e3a\u201c\u9884\u6d4b\u5927\u5e08\u201d<\/a><\/h1>\n<div id=\"meta_content\" class=\"rich_media_meta_list\"><span class=\"rich_media_meta rich_media_meta_text\">\u5c0f\u82b1 <\/span><span class=\"rich_media_meta rich_media_meta_nickname\" id=\"profileBt\"><a href=\"javascript:void(0);\" class=\"wx_tap_link js_wx_tap_highlight weui-wa-hotarea\" id=\"js_name\">\u751f\u4fe1\u679c <\/a><\/span><em id=\"publish_time\" class=\"rich_media_meta rich_media_meta_text\">2023-08-22 19:00:12<\/em><\/div>\n<p><content><\/p>\n<div class=\"reprint\">\n<p>\u8f6c\u81ea\u516c\u4f17\u53f7\uff1a\u751f\u4fe1\u82b1<br \/><a href=\"http:\/\/mp.weixin.qq.com\/s?__biz=MzkzODUxNjcwMA==&mid=2247484228&idx=1&sn=3df722ea1fff28ef9f6a3419187f8296\" target=\"_blank\" title=\"\u9605\u8bfb\u539f\u6587\" rel=\"noopener\">http:\/\/mp.weixin.qq.com\/s?__biz=MzkzODUxNjcwMA==&mid=2247484228&idx=1&sn=3df722ea1fff28ef9f6a3419187f8296<\/a><\/p>\n<\/div>\n<section style=\"font-size: 14px;margin-bottom: 24px;\">\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;align-self: flex-start;flex: 0 0 auto;background-color: rgb(65, 128, 216);\">\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;padding-left: 12px;\">\n<section style=\"text-align: justify;color: rgb(255, 255, 255);\" powered-by=\"xiumi.us\">\n<p><strong>\u70b9\u51fb\u84dd\u5b57 \u5173\u6ce8\u6211\u4eec<\/strong><\/p>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\">\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: top;width: 34px;align-self: flex-start;flex: 0 0 auto;height: auto;overflow: hidden;margin-right: -17px;\">\n<section style=\"transform: rotateZ(60deg);\" powered-by=\"xiumi.us\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;text-align: center;\">\n<section style=\"width: 100%;height: 5px;background-color: rgb(255, 255, 255);\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: top;width: 34px;align-self: flex-start;flex: 0 0 auto;height: auto;overflow: hidden;margin-right: -17px;\">\n<section style=\"transform: rotateZ(60deg);\" powered-by=\"xiumi.us\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;text-align: center;\">\n<section style=\"width: 100%;height: 5px;background-color: rgb(201, 229, 70);\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"display: inline-block;vertical-align: top;width: 34px;align-self: flex-start;flex: 0 0 auto;height: auto;overflow: hidden;\">\n<section style=\"transform: rotateZ(60deg);\" powered-by=\"xiumi.us\">\n<section style=\"margin-top: 10px;margin-bottom: 10px;text-align: center;\">\n<section style=\"width: 100%;height: 5px;background-color: rgb(255, 255, 255);\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 0em;text-wrap: wrap;\"><span style=\"text-indent: 2em;\">\u5927\u5bb6\u597d\uff0c\u6211\u662f\u5c0f\u82b1\uff0c\u4e00\u4e2a\u5bf9\u751f\u7269\u4fe1\u606f\u5b66\u5145\u6ee1\u70ed\u60c5\u7684\u5c0f\u4f19\u4f34\u3002\u4eca\u5929\uff0c\u6211\u8981\u548c\u5927\u5bb6\u5206\u4eab\u4e00\u9879\u4ee4\u4eba\u6fc0\u52a8\u7684\u6280\u672f\u2014\u2014\u4f7f\u7528R\u8bed\u8a00\u4e2d\u7684\u795e\u5947\u5305randomForest\u8fdb\u884c\u75be\u75c5\u9884\u6d4b\u3002\u901a\u8fc7\u8fd9\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u6570\u636e\u7684\u529b\u91cf\u6210\u4e3a\u771f\u6b63\u7684\u201c\u9884\u6d4b\u5927\u5e08\u201d\u3002\u8fd8\u7b49\u4ec0\u4e48\u5462\uff1f\u5feb\u6765\u63a2\u7d22\u8fd9\u4e2a\u795e\u5947\u7684\u9886\u57df\u5427\uff01<\/span><br \/><\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u75be\u75c5\u9884\u6d4b\u4e00\u76f4\u662f\u533b\u5b66\u9886\u57df\u7684\u91cd\u5927\u6311\u6218\uff0c\u800c\u73b0\u4ee3\u751f\u7269\u4fe1\u606f\u5b66\u6280\u672f\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u7a81\u7834\u7684\u673a\u4f1a\u3002randomForest\u5305\u7684\u51fa\u73b0\u4e3a\u6211\u4eec\u5e26\u6765\u4e86\u4e00\u79cd\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u9884\u6d4b\u75be\u75c5\u7684\u53d1\u751f\u548c\u53d1\u5c55\u8d8b\u52bf\u3002<\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">randomForest\u662f\u4e00\u79cd\u96c6\u6210\u5b66\u4e60\u7b97\u6cd5\uff0c\u57fa\u4e8e\u51b3\u7b56\u6811\u7684\u601d\u60f3\u3002\u8fd9\u4e2a\u7b97\u6cd5\u7684\u5965\u5999\u4e4b\u5904\u5728\u4e8e\uff0c\u5b83\u901a\u8fc7\u7ec4\u5408\u591a\u4e2a\u51b3\u7b56\u6811\u7684\u9884\u6d4b\u7ed3\u679c\u6765\u63d0\u9ad8\u9884\u6d4b\u7684\u51c6\u786e\u6027\u3002\u5c31\u50cf\u68ee\u6797\u4e2d\u7684\u6811\u6728\u4e00\u6837\uff0c\u6bcf\u68f5\u51b3\u7b56\u6811\u90fd\u6709\u81ea\u5df1\u7684\u7279\u70b9\uff0c\u800c\u96c6\u6210\u540e\u7684\u7ed3\u679c\u5374\u6bd4\u5355\u4e2a\u6811\u66f4\u53ef\u9760\u3002<\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u5728R\u4e2d\uff0crandomForest\u5305\u63d0\u4f9b\u4e86\u591a\u4e2a\u51fd\u6570\u7528\u4e8e\u6784\u5efa\u548c\u5206\u6790\u968f\u673a\u68ee\u6797\u6a21\u578b\u3002\u4e0b\u9762\u662frandomForest\u5305\u4e2d\u5e38\u7528\u7684\u51fd\u6570\u53ca\u5176\u53c2\u6570\u7684\u89e3\u91ca\uff1a<\/p>\n<\/section>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">randomForest(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u8fd9\u662f\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b\u7684\u4e3b\u8981\u51fd\u6570\u3002\u5b83\u7684\u4e3b\u8981\u53c2\u6570\u5305\u62ec\uff1a<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">x: \u81ea\u53d8\u91cf\u77e9\u9635\u6216\u6570\u636e\u6846\uff0c\u5305\u542b\u7528\u4e8e\u8bad\u7ec3\u6a21\u578b\u7684\u7279\u5f81\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">y: \u56e0\u53d8\u91cf\u5411\u91cf\uff0c\u5305\u542b\u4e0e\u81ea\u53d8\u91cf\u76f8\u5bf9\u5e94\u7684\u76ee\u6807\u53d8\u91cf\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">ntree: \u51b3\u7b56\u6811\u7684\u6570\u91cf\uff0c\u5373\u968f\u673a\u68ee\u6797\u4e2d\u6811\u7684\u4e2a\u6570\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">mtry: \u6bcf\u68f5\u51b3\u7b56\u6811\u4e2d\u968f\u673a\u9009\u62e9\u7684\u7279\u5f81\u6570\u91cf\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">importance: \u662f\u5426\u8ba1\u7b97\u53d8\u91cf\u91cd\u8981\u6027\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">…: \u5176\u4ed6\u53c2\u6570\u7528\u4e8e\u63a7\u5236\u6a21\u578b\u6784\u5efa\u8fc7\u7a0b\uff0c\u5982\u8282\u70b9\u5206\u88c2\u7684\u51c6\u5219\u3001\u6837\u672c\u62bd\u6837\u65b9\u5f0f\u7b49\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">importance(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u5df2\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b\u4e2d\u7684\u53d8\u91cf\u91cd\u8981\u6027\u3002<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">rf: \u968f\u673a\u68ee\u6797\u6a21\u578b\u5bf9\u8c61\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">type: \u91cd\u8981\u6027\u5ea6\u91cf\u7684\u7c7b\u578b\uff0c\u5982MeanDecreaseAccuracy\uff08\u5e73\u5747\u51c6\u786e\u7387\u4e0b\u964d\uff09\u3001MeanDecreaseGini\uff08\u5e73\u5747Gini\u6307\u6570\u4e0b\u964d\uff09\u7b49\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">predict(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u7528\u4e8e\u5bf9\u65b0\u7684\u6570\u636e\u8fdb\u884c\u9884\u6d4b\u6216\u63a8\u65ad\u3002<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">rf: \u968f\u673a\u68ee\u6797\u6a21\u578b\u5bf9\u8c61\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">newdata: \u5305\u542b\u8981\u8fdb\u884c\u9884\u6d4b\u7684\u65b0\u6570\u636e\u7684\u77e9\u9635\u6216\u6570\u636e\u6846\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">plot(): <\/span><\/strong><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u7528\u4e8e\u7ed8\u5236\u968f\u673a\u68ee\u6797\u6a21\u578b\u7684\u56fe\u5f62\uff0c\u5982\u53d8\u91cf\u91cd\u8981\u6027\u56fe\u3001\u8bef\u5dee\u56fe\u7b49\u3002<\/span><\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">x: \u968f\u673a\u68ee\u6797\u6a21\u578b\u5bf9\u8c61\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">…: \u5176\u4ed6\u53c2\u6570\u7528\u4e8e\u63a7\u5236\u56fe\u5f62\u7684\u5916\u89c2\u548c\u5e03\u5c40\u3002<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">\u8fd9\u4e9b\u662frandomForest\u5305\u4e2d\u7684\u4e00\u4e9b\u5e38\u7528\u51fd\u6570\u548c\u53c2\u6570\u3002\u5f53\u4f7f\u7528\u8fd9\u4e9b\u51fd\u6570\u6784\u5efa\u548c\u5206\u6790\u968f\u673a\u68ee\u6797\u6a21\u578b\u65f6\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u95ee\u9898\u548c\u9700\u8981\u6765\u8c03\u6574\u53c2\u6570\uff0c\u4ee5\u83b7\u5f97\u6700\u4f73\u7684\u7ed3\u679c\u548c\u7406\u89e3\u6a21\u578b\u7684\u5173\u952e\u7279\u5f81\u3002<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 2em;text-wrap: wrap;\"><br \/><\/p>\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u4f7f\u7528randomForest\u5305\u8fdb\u884c\u7cd6\u5c3f\u75c5\u9884\u6d4b\u7684\u7b80\u5355\u793a\u4f8b\uff1a<\/p>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p>\u4ee3\u7801\u5177\u4f53\u5305\u62ec\uff1a<\/p>\n<p><span style=\"color: rgb(16, 116, 231);\"><strong>Step1 \u5bfc\u5165\u6570\u636e\u96c6\u4ee5\u53ca\u6570\u636e\u9884\u5904\u7406<\/strong><\/span><\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u8fd9\u91cc\u7684\"inputdata.txt\"\u662f\u81ea\u884c\u51c6\u5907\u7684\u672c\u5730\u6587\u4ef6\uff0c\u5c0f\u82b1\u7ed9\u5927\u5bb6\u9644\u5728\u6700\u540e\u3002<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 1.\u5bfc\u5165\u6570\u636e\u96c6\u4ee5\u53ca\u6570\u636e\u9884\u5904\u7406<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u5b89\u88c5\u548c\u52a0\u8f7drandomForest\u5305<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#install.packages(\"randomForest\")<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">library(randomForest)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u5bfc\u5165\u6570\u636e\u96c6<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">data <- read.table(file = <span class=\"code-snippet__string\">\"D:\/wanglab\/life\/ziyuan\/20230628\/inputdata.txt\"<\/span>,header = <span class=\"code-snippet__built_in\">T<\/span>) <span class=\"code-snippet__comment\"># \u66ff\u6362\u4e3a\u5b9e\u9645\u6570\u636e\u96c6\u6587\u4ef6\u7684\u8def\u5f84<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">data$diabetes <- as.factor(data$diabetes)<\/span><\/code><code><span class=\"code-snippet_outer\">head(data)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><br \/><\/p>\n<\/section>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u8f93\u5165\u6570\u636e\u5c55\u793a<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.21863117870722434\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/1_jJTicvDibkIcrS9QM9QIQ5VP3oDq1A.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbGy8ia47KFAxjeGoaEpqmVKD9ibTiajJTicvDibkIcrS9QM9QIQ5VP3oDq1A\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"526\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u5212\u5206\u6570\u636e\u96c6\u4e3a\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">set.seed(<span class=\"code-snippet__number\">123<\/span>) <span class=\"code-snippet__comment\"># \u8bbe\u7f6e\u968f\u673a\u79cd\u5b50\uff0c\u4fdd\u8bc1\u7ed3\u679c\u53ef\u590d\u73b0<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">indices <- sample(<span class=\"code-snippet__number\">1<\/span>:nrow(data), nrow(data)*<span class=\"code-snippet__number\">0.8<\/span>) <span class=\"code-snippet__comment\"># 80%\u7684\u6570\u636e\u7528\u4e8e\u8bad\u7ec3\uff0c20%\u7684\u6570\u636e\u7528\u4e8e\u6d4b\u8bd5<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">trainingset <- data[indices, ]<\/span><\/code><code><span class=\"code-snippet_outer\">testingset <- data[-indices, ]<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong><span style=\"color: rgb(16, 116, 231);\">Step2\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b<\/span><\/strong><\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 2.\u521b\u5efa\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 2.\u6784\u5efa\u968f\u673a\u68ee\u6797\u6a21\u578b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">rf_model <- randomForest(diabetes ~ ., data = trainingset, ntree = <span class=\"code-snippet__number\">500<\/span>,mtry=<span class=\"code-snippet__number\">2<\/span>)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u67e5\u770b\u6a21\u578b\u7ed3\u679c<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">print(rf_model)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u67e5\u770b\u6a21\u578b\u7ed3\u679c\u622a\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3505747126436782\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/2_9xGVItC397giaiayoviaUiaLAEUUww.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbMzRYcibOgm4BicMDbwhMgDSg8ZAKsd9xGVItC397giaiayoviaUiaLAEUUww\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"522\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u53d8\u91cf\u91cd\u8981\u6027\u56fe<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">varImpPlot(rf_model)<\/span><\/code><code><span class=\"code-snippet_outer\">rf_model$importance<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u53d8\u91cf\u91cd\u8981\u6027\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;width: 100%;height: auto;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.7053140096618358\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/3_QOIuUmDIbHGiaV5e0eo1cguPuia1BQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbUh7M5W12bJbeGwjibwn3PmINvrQQOIuUmDIbHGiaV5e0eo1cguPuia1BQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"207\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.8574660633484162\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/4_Agj8zGo2uWbDNfuEHT96wibXZNElsQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDb4yY7DzwG0EW98WjVTiczGcLFJ0Agj8zGo2uWbDNfuEHT96wibXZNElsQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"442\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p>randomForest\u6a21\u578b\u7684\u7ed3\u679c\u5c06\u663e\u793a\u51fa\u91cd\u8981\u7684\u53d8\u91cf\u3001\u6bcf\u4e2a\u53d8\u91cf\u7684\u91cd\u8981\u6027\u6307\u6807\u4ee5\u53ca\u9884\u6d4b\u51c6\u786e\u6027\u7684\u5ea6\u91cf\u3002\u8fd9\u4e9b\u4fe1\u606f\u6709\u52a9\u4e8e\u6211\u4eec\u7406\u89e3\u54ea\u4e9b\u56e0\u7d20\u5bf9\u4e8e\u75be\u75c5\u7684\u9884\u6d4b\u8d77\u7740\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u7ed8\u5236\u8bef\u5dee\u56fe<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">plot(rf_model, main = <span class=\"code-snippet__string\">\"Random Forest Model Error\"<\/span>, type = <span class=\"code-snippet__string\">\"o\"<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u8bef\u5dee\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.2257001647446457\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/5_cF7C4huOicyw0qSK6dibOqD9BweX0Q.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbHeNfdqIp41J0mEtVDiaetvfGAqFcF7C4huOicyw0qSK6dibOqD9BweX0Q\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"607\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 0em;text-wrap: wrap;\">\u5728\u8bef\u5dee\u56fe\u4e2d\uff0c\u6a2a\u8f74\u8868\u793a\u968f\u673a\u68ee\u6797\u4e2d\u7684\u6bcf\u4e2a\u51b3\u7b56\u6811\uff0c\u7eb5\u8f74\u8868\u793a\u8bef\u5dee\u6216\u635f\u5931\u5ea6\u91cf\u3002\u6bcf\u4e2a\u70b9\u4ee3\u8868\u4e00\u4e2a\u51b3\u7b56\u6811\u6a21\u578b\u7684\u8bef\u5dee\u6216\u635f\u5931\u503c\uff0c\u800c\u6574\u4f53\u7684\u7ebf\u6761\u6216\u66f2\u7ebf\u8868\u793a\u6240\u6709\u51b3\u7b56\u6811\u6a21\u578b\u7684\u5e73\u5747\u8bef\u5dee\u6216\u635f\u5931\u3002\u8bef\u5dee\u56fe\u4e2d\u7684\u4e0d\u540c\u989c\u8272\u7ebf\u6761\u4ee3\u8868\u4e86\u4e0d\u540c\u6837\u672c\u96c6\u751f\u6210\u7684\u6a21\u578b\u7684\u9884\u6d4b\u8bef\u5dee\u3002\u8fd9\u4e9b\u4e0d\u540c\u989c\u8272\u7684\u7ebf\u6761\u8868\u793a\u968f\u673a\u68ee\u6797\u4e2d\u7684\u4e0d\u540c\u51b3\u7b56\u6811\u6a21\u578b\u6216\u5b50\u6a21\u578b\u7684\u5e73\u5747\u8bef\u5dee\u503c\u3002\u4e0d\u540c\u989c\u8272\u7684\u7ebf\u6761\u8d8b\u4e8e\u5e73\u884c\u4e14\u76f8\u4e92\u9760\u8fd1\uff0c\u8868\u793a\u968f\u673a\u68ee\u6797\u4e2d\u7684\u5b50\u6a21\u578b\u5177\u6709\u76f8\u4f3c\u7684\u8bef\u5dee\u6c34\u5e73\uff0c\u6a21\u578b\u7684\u9884\u6d4b\u7ed3\u679c\u6bd4\u8f83\u7a33\u5b9a\u3002<\/p>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># \u7ed8\u5236\u5355\u68f5\u51b3\u7b56\u6811<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">library(rpart.plot)<\/span><\/code><code><span class=\"code-snippet_outer\">plot(rf_model$forest[[<span class=\"code-snippet__number\">1<\/span>]], uniform = <span class=\"code-snippet__literal\">TRUE<\/span>, main = <span class=\"code-snippet__string\">\"Decision Tree\"<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>\u5355\u68f5\u51b3\u7b56\u6811<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.2257001647446457\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/6_uicOTSiaCKI9we6RqQhTiaRP8mZdog.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDbsELZ22hGDu8GuJx8orIDF4yx9F8uicOTSiaCKI9we6RqQhTiaRP8mZdog\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"607\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong><span style=\"color: rgb(16, 116, 231);\">Step3 \u7ed8\u5236AUC\u66f2\u7ebf\u8bc4\u4f30\u6a21\u578b<\/span><\/strong><\/p>\n<\/section>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\"># 3.\u7ed8\u5236AUC\u66f2\u7ebf\u8bc4\u4f30\u6a21\u578b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u5bf9\u6d4b\u8bd5\u96c6\u8fdb\u884c\u9884\u6d4b<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">pre_ran <- predict(rf_model,newdata=testingset)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u5c06\u771f\u5b9e\u503c\u548c\u9884\u6d4b\u503c\u6574\u5408\u5230\u4e00\u8d77<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">obs_p_ran = data.frame(prob=pre_ran,obs=testingset$diabetes)<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u8f93\u51fa\u6df7\u6dc6\u77e9\u9635<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">table(testingset$diabetes,pre_ran,dnn=<span class=\"code-snippet__built_in\">c<\/span>(<span class=\"code-snippet__string\">\"\u771f\u5b9e\u503c\"<\/span>,<span class=\"code-snippet__string\">\"\u9884\u6d4b\u503c\"<\/span>))<\/span><\/code><code><span class=\"code-snippet_outer\"><span class=\"code-snippet__comment\">#\u7ed8\u5236ROC\u66f2\u7ebf<\/span><\/span><\/code><code><span class=\"code-snippet_outer\">ran_roc <- roc(testingset$diabetes,<span class=\"code-snippet__built_in\">as.numeric<\/span>(pre_ran)<\/span><\/code><code><span class=\"code-snippet_outer\">plot(ran_roc, print.auc=<span class=\"code-snippet__literal\">TRUE<\/span>, auc.polygon=<span class=\"code-snippet__literal\">TRUE<\/span>, grid=<span class=\"code-snippet__built_in\">c<\/span>(<span class=\"code-snippet__number\">0.1<\/span>, <span class=\"code-snippet__number\">0.2<\/span>),grid.col=<span class=\"code-snippet__built_in\">c<\/span>(<span class=\"code-snippet__string\">\"green\"<\/span>, <span class=\"code-snippet__string\">\"red\"<\/span>), max.auc.polygon=<span class=\"code-snippet__literal\">TRUE<\/span>,auc.polygon.col=<span class=\"code-snippet__string\">\"skyblue\"<\/span>, print.thres=<span class=\"code-snippet__literal\">TRUE<\/span>,main=<span class=\"code-snippet__string\">'\u968f\u673a\u68ee\u6797\u6a21\u578bROC\u66f2\u7ebf,mtry=2,ntree=500'<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;transform: translate3d(-15px, 0px, 0px);\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;vertical-align: middle;width: auto;min-width: 5%;flex: 0 0 auto;height: auto;align-self: center;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<section style=\"display: inline-block;vertical-align: middle;width: auto;align-self: center;flex: 0 0 auto;min-width: 5%;height: auto;background-color: rgb(129, 167, 211);padding: 13px;\">\n<section style=\"text-align: justify;color: rgb(19, 53, 102);font-size: 16px;padding-right: 12px;padding-left: 12px;\" powered-by=\"xiumi.us\">\n<p><strong>AUC\u66f2\u7ebf\u56fe<\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;\" powered-by=\"xiumi.us\">\n<section style=\"vertical-align: middle;display: inline-block;line-height: 0;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.2257001647446457\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/7_dkxryl6iaMetJbwsQibMANbYjicSmg.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/KDvR2NrGicSZKUqQ6njKoxj0ZoBAbJnDb9BRGDCRmqk1eXDdZQJu6vZeia58hdkxryl6iaMetJbwsQibMANbYjicSmg\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"607\" style=\"vertical-align: middle;width: 100%;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"justify-content: flex-start;display: flex;flex-flow: row;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 100%;vertical-align: top;border-width: 1px;border-radius: 8px;border-style: dotted;border-color: rgb(0, 0, 0);overflow: hidden;align-self: flex-start;flex: 0 0 auto;\">\n<section style=\"margin: 15px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);padding-right: 15px;padding-left: 15px;\">\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u6ce8\uff1a<\/span><\/p>\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\"># \u8bf7\u786e\u4fdd\u5c06\u8def\u5f84”inputdata.txt”\u66ff\u6362\u4e3a\u5b9e\u9645\u6570\u636e\u96c6\u6587\u4ef6\u7684\u8def\u5f84\uff0c\u5e76\u6839\u636e\u9700\u8981\u8c03\u6574\u6a21\u578b\u53c2\u6570\u548c\u5176\u4ed6\u914d\u7f6e\u3002<\/span><\/p>\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\"># \u5728\u7ed8\u5236AUC\u66f2\u7ebf\u4e4b\u524d\uff0c\u786e\u4fdd\u60a8\u7684\u6a21\u578b\u8f93\u51fa\u7684\u662f\u9884\u6d4b\u7684\u6982\u7387\u503c\uff0c\u800c\u4e0d\u662f\u7c7b\u522b\u6807\u7b7e\u3002<\/span><\/p>\n<p><span style=\"text-shadow: rgb(255, 253, 231) 0.766044px 0.642788px 2px;\">\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u5b89\u88c5\u5e76\u52a0\u8f7d\u4e86randomForest\u5305\u3002\u7136\u540e\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u793a\u4f8b\u6570\u636e\u96c6\uff0c\u5176\u4e2d\u5305\u542b\u5e74\u9f84\uff08age\uff09\u548c\u4f53\u8d28\u6307\u6570\uff08bmi\uff09\u4f5c\u4e3a\u81ea\u53d8\u91cf\uff0c\u75be\u75c5\u60c5\u51b5\uff08disease\uff09\u4f5c\u4e3a\u56e0\u53d8\u91cf\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f7f\u7528randomForest\u51fd\u6570\u6784\u5efa\u4e86\u4e00\u4e2a\u75be\u75c5\u9884\u6d4b\u6a21\u578b\uff0c\u5176\u4e2d\u81ea\u53d8\u91cf\u901a\u8fc7~\u7b26\u53f7\u4e0e\u56e0\u53d8\u91cf\u76f8\u8fde\u3002\u6700\u540e\uff0c\u6211\u4eec\u901a\u8fc7\u6253\u5370rf_model\u6765\u67e5\u770b\u9884\u6d4b\u7ed3\u679c\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><br \/><\/p>\n<section style=\"text-align: left;justify-content: flex-start;display: flex;flex-flow: row;margin-top: 10px;margin-bottom: 10px;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: 98%;vertical-align: top;align-self: flex-start;flex: 0 0 auto;height: auto;border-style: solid;border-width: 2px;border-color: rgb(160, 160, 160);padding: 27px;\">\n<section style=\"text-align: justify;line-height: 1.6;letter-spacing: 0px;padding-right: 6px;padding-left: 6px;\" powered-by=\"xiumi.us\">\n<p style=\"text-indent: 2em;text-wrap: wrap;\">\u73b0\u5728\uff0c\u6211\u60f3\u544a\u8bc9\u5927\u5bb6\u4e00\u4e2a\u6709\u8da3\u7684\u4e8b\u5b9e\uff1a\u201c\u4f7f\u7528randomForest\u5305\u8fdb\u884c\u75be\u75c5\u9884\u6d4b\uff0c\u5c31\u50cf\u5728\u68ee\u6797\u4e2d\u5bfb\u627e\u79d8\u5bc6\u8def\u5f84\uff0c\u800c\u8fd9\u4e2a\u8def\u5f84\u5c06\u5e26\u9886\u6211\u4eec\u63ed\u5f00\u75be\u75c5\u7684\u9762\u7eb1\u3002\u201d\u662f\u4e0d\u662f\u8ba9\u4f60\u5fc3\u52a8\u4e0d\u5df2\u5462\uff1f<\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">\u6700\u540e\uff0c\u6211\u60f3\u5f3a\u8c03\u4e00\u4e0b\u4f7f\u7528\u516c\u4f17\u53f7\u5e73\u53f0\u8fdb\u884c\u6570\u636e\u5206\u6790\u7684\u4fbf\u5229\u6027\u3002\u4e91\u751f\u4fe1\u5e73\u53f0\uff08http:\/\/www.biocloudservice.com\/home.html\uff09<span style=\"color: rgb(62, 62, 62);\">\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7b80\u5355\u3001\u65b9\u4fbf\u3001\u5feb\u901f\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u5206\u4eab\u7ed3\u679c\u3002\u4f60\u53ea\u9700\u8f7b\u677e\u70b9\u51fb\uff0c\u5373\u53ef\u638c\u63e1\u6570\u636e\u7684\u5965\u79d8\uff0c\u6210\u4e3a\u75be\u75c5\u9884\u6d4b\u7684\u9ad8\u624b\uff01<\/span> <\/p>\n<p style=\"text-indent: 2em;text-wrap: wrap;\">\u8ba9\u6211\u4eec\u4e00\u8d77\u5229\u7528randomForest\u5305\uff0c\u501f\u52a9\u516c\u4f17\u53f7\u5e73\u53f0\u7684\u529b\u91cf\uff0c\u7528\u6570\u636e\u9a71\u52a8\u7684\u65b9\u6cd5\u6765\u63ed\u793a\u75be\u75c5\u7684\u79d8\u5bc6\uff0c\u4e3a\u533b\u5b66\u7814\u7a76\u8d21\u732e\u4e00\u4efd\u529b\u91cf\u5427\uff01<\/p>\n<p><br \/><\/p>\n<p>\u6b22\u8fce\u4f7f\u7528\uff1a\u4e91\u751f\u4fe1 – \u5b66\u751f\u7269\u4fe1\u606f\u5b66 (biocloudservice.com)<\/p>\n<p><br \/><\/p>\n<p>\u5982\u679c\u60f3\u7528\u670d\u52a1\u5668\u53ef\u4ee5\u8054\u7cfb\u5fae\u4fe1\uff1a18502195490\uff08\u5feb\u6765\u8054\u7cfb\u6211\u4eec\u4f7f\u7528\u5427\uff01\uff09<\/p>\n<\/section>\n<section style=\"text-align: right;justify-content: flex-end;display: flex;flex-flow: row;transform: translate3d(40px, 0px, 0px);margin-bottom: -40px;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;width: auto;vertical-align: top;align-self: flex-start;flex: 0 0 auto;min-width: 5%;height: auto;\">\n<section style=\"transform: rotateZ(45deg);\" powered-by=\"xiumi.us\">\n<section style=\"text-align: center;\">\n<section style=\"display: inline-block;width: 26px;height: 26px;vertical-align: top;overflow: hidden;background-color: rgb(255, 255, 255);border-left: 1px solid rgb(160, 160, 160);border-bottom-left-radius: 0px;\">\n<section style=\"text-align: justify;\" powered-by=\"xiumi.us\">\n<p><br \/><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p powered-by=\"xiumi.us\"><a target=\"_blank\" href=\"https:\/\/mp.weixin.qq.com\/s?__biz=MzAwNjE0MDY3MQ==&mid=2650761303&idx=2&sn=6f73471d1e82c56c0b2160d0fcd32d53&scene=21#wechat_redirect\" textvalue=\"\" linktype=\"image\" imgurl=\"https:\/\/mmbiz.qpic.cn\/mmbiz_jpg\/KDvR2NrGicSYCoxhZfqr5L0fxy3C9eSFdt72DV7zqsmrNaiaaoOhic3sHzUpBN4r4MaBCk9p9v16yZwvMvS5nM7sQ\/0?wx_fmt=jpeg\" imgdata=\"[object Object]\" tab=\"innerlink\" data-linktype=\"1\" rel=\"noopener\"><span class=\"js_jump_icon h5_image_link\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.35083798882681566\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/8_pBN4r4MaBCk9p9v16yZwvMvS5nM7sQ.jpg?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_jpg\/KDvR2NrGicSYCoxhZfqr5L0fxy3C9eSFdt72DV7zqsmrNaiaaoOhic3sHzUpBN4r4MaBCk9p9v16yZwvMvS5nM7sQ\/640?wx_fmt=jpeg'\" data-type=\"jpeg\" data-w=\"895\" style=\"\" data-recalc-dims=\"1\" \/><\/span><\/a><br \/><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-galleryid=\"\" data-ratio=\"0.3488888888888889\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/9_uKaqczIP6EMQhkT9sW7c1bKv6z9AAg.jpg?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_jpg\/KDvR2NrGicSYCoxhZfqr5L0fxy3C9eSFdD9CpdQZl2iaySUTmNepgg2BpMuKaqczIP6EMQhkT9sW7c1bKv6z9AAg\/640?wx_fmt=jpeg'\" data-type=\"jpeg\" data-w=\"900\" style=\"\" data-recalc-dims=\"1\" \/><\/p>\n<p powered-by=\"xiumi.us\">\uff08\u70b9\u51fb\u9605\u8bfb\u539f\u6587\u8df3\u8f6c\uff09<\/p>\n<section style=\"text-align: left;margin: 10px 0%;\" powered-by=\"xiumi.us\">\n<section style=\"display: inline-block;min-width: 10%;vertical-align: top;padding-right: 20px;\">\n<section style=\"transform: translate3d(20px, 0px, 0px);margin: 10px 0% -30px;\" powered-by=\"xiumi.us\">\n<section style=\"color: rgb(62, 62, 62);text-align: justify;font-size: 12px;\">\n<p><strong><img decoding=\"async\" loading=\"lazy\" class=\"rich_pages wxw-img\" data-ratio=\"0.866\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/10_b2CalNAXxLws46NJt6icZUA1wCd0TA.gif?resize=18%2C15\" 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