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hidden;border-width: 0px;border-radius: 155px;border-style: none;border-color: rgb(62, 62, 62);background-color: rgb(245, 245, 245);box-sizing: border-box;\"><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 style=\"text-align: center;transform: translate3d(3px, 0px, 0px);-webkit-transform: translate3d(3px, 0px, 0px);-moz-transform: translate3d(3px, 0px, 0px);-o-transform: translate3d(3px, 0px, 0px);box-sizing: border-box;\">\n<section style=\"display: inline-block;width: 0px;height: 0px;vertical-align: top;overflow: hidden;border-style: solid;border-width: 0px 0px 4px 4px;border-color: rgba(255, 255, 255, 0) rgba(255, 255, 255, 0) rgba(255, 255, 255, 0) rgb(59, 149, 115);box-sizing: border-box;\"><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 style=\"padding: 0px 10px;letter-spacing: 2px;line-height: 1.8;box-sizing: border-box;\">\n<p style=\"white-space: normal;margin: 0px;padding: 0px;box-sizing: border-box;\"> \u55e8\uff01\u4eb2\u7231\u7684\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\uff01\u6211\u662f\u5927\u6d77\u54e5\u3002\u4eca\u5929\u5927\u6d77\u54e5\u8981\u548c\u5927\u5bb6\u804a\u804a\u673a\u5668\u5b66\u4e60\u9886\u57df\u91cc\u7684\u4e00\u9897\u95ea\u8000\u4e4b\u661f\u2728 \u2014\u2014XGBoost\u7b97\u6cd5\uff01<br style=\"box-sizing: border-box;\" \/>XGBoost\uff0c\u5168\u79f0Extreme Gradient Boosting\uff0c\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\uff0c\u6211\u4eec\u90fd\u542c\u8bf4\u8fc7\u8fd9\u53e5\u8bdd\uff0cMachine learning is changing the world! \u800cXGBoost\u66f4\u5728\u5404\u79cd\u6570\u636e\u6316\u6398\u548c\u9884\u6d4b\u4efb\u52a1\u4e2d\u8868\u73b0\u51fa\u8272\uff0c\u5b83\u4ee5\u5176\u5353\u8d8a\u7684\u6027\u80fd\u548c\u51fa\u8272\u7684\u9c81\u68d2\u6027\uff0c\u6210\u4e3a\u4f17\u591a\u6570\u636e\u79d1\u5b66\u5bb6\u548c\u673a\u5668\u5b66\u4e60\u4ece\u4e1a\u8005\u7684\u6700\u7231\u54e6\uff01\u8fd9\u4e2a\u7b97\u6cd5\u7684\u95ea\u4eae\u4e4b\u5904\u5728\u4e8e\u5b83\u7684\u68af\u5ea6\u63d0\u5347\u6846\u67b6\uff0c\u53ef\u4ee5\u5728\u5904\u7406\u5206\u7c7b\u548c\u56de\u5f52\u95ee\u9898\u65f6\u90fd\u8868\u73b0\u5f97\u76f8\u5f53\u51fa\u8272\u3002\u5b83\u4f1a\u901a\u8fc7\u591a\u8f6e\u8fed\u4ee3\uff0c\u9010\u6b65\u63d0\u5347\u9884\u6d4b\u6a21\u578b\u7684\u51c6\u786e\u6027\uff0c\u4e0d\u65ad\u4f18\u5316\u6a21\u578b\u8868\u73b0\u3002\u5c31\u50cf\u662f\u4e00\u4f4d\u806a\u660e\u7684\u5b66\u751f\uff0c\u4e0d\u65ad\u5438\u6536\u77e5\u8bc6\uff0c\u8fdb\u6b65\u7a81\u98de\u731b\u8fdb\uff01<br style=\"box-sizing: border-box;\" \/>\u5176\u8fd8\u6709\u4e00\u4e2a\u4e3b\u8981\u7279\u70b9\uff0c\u5c31\u662f\u5b83\u5bf9\u4e8e\u590d\u6742\u7684\u6570\u636e\u96c6\u548c\u9ad8\u7ef4\u7279\u5f81\u7684\u9002\u5e94\u80fd\u529b\u975e\u5e38\u5f3a\u5927\u3002\u5b83\u4e0d\u5bb9\u6613\u53d7\u5230\u8fc7\u62df\u5408\u7684\u56f0\u6270\uff0c\u800c\u4e14\u80fd\u591f\u5904\u7406\u7f3a\u5931\u503c\u548c\u5f02\u5e38\u6570\u636e\uff0c\u4f7f\u5f97\u6570\u636e\u9884\u5904\u7406\u53d8\u5f97\u76f8\u5f53\u4fbf\u6377\u3002\u5c31\u50cf\u662f\u4e00\u4f4d\u6570\u636e\u7684\u9b54\u672f\u5e08\uff0c\u603b\u80fd\u4ece\u6df7\u6c8c\u7684\u6570\u636e\u4e2d\u627e\u5230\u89c4\u5f8b\uff01\u800c\u4e14\uff0cXGBoost\u7684\u6a21\u578b\u89e3\u91ca\u6027\u4e5f\u5f88\u5f3a\uff0c\u8fd9\u610f\u5473\u7740\u4f60\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u6a21\u578b\u662f\u5982\u4f55\u505a\u51fa\u9884\u6d4b\u7684\uff0c\u4ece\u800c\u4e3a\u4e1a\u52a1\u51b3\u7b56\u63d0\u4f9b\u652f\u6301\u3002<br style=\"box-sizing: border-box;\" \/>\u90a3\u4e48\u4ecb\u7ecd\u4e86\u8fd9\u4e48\u591a\uff0c\u5c31\u8ba9\u5927\u6d77\u54e5\u5e26\u9886\u5c0f\u4f19\u4f34\u4eec\u6765\u9886\u609f\u4e00\u4e0b\u8fd9\u4e2a\u7b97\u6cd5\u7684\u9b45\u529b\u5427\uff01<\/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 style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u9996\u5148\u52a0\u8f7dR\u5305<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">require(xgboost) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">require(Matrix) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">require(data.table) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">library(survival) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">data(cancer, package=<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"survival\"<\/span>) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df <- data.table(colon, keep.rownames = <span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">FALSE<\/span>) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df<-df[<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>:<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">100<\/span>,]<span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u8fd9\u91cc\u6211\u4eec\u9009\u62e9\u524d\u4e00\u767e\u4e2a\u6570\u636e\u8fdb\u884c\u5904\u7406\uff0c\u5728\u4f7f\u7528\u81ea\u5df1\u6570\u636e\u7684\u65f6\u5019\u4e00\u5b9a\u8981\u5904\u7406\u7f3a\u5931\u503c <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(df)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3707165109034268\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/1_9Hq0ht055NPLCTyiaqq7Xaq87CRCyw.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWhV8yPyvUicqTuYNzb7Viap5Jtas9Hq0ht055NPLCTyiaqq7Xaq87CRCyw\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"642\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u628a\u7ed3\u5c40\u53d8\u91cf\u751f\u5b58\u72b6\u6001\u8f6c\u6362\u4e3a\u56e0\u5b50\u578b <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df$status<-factor(df$status,levels = <span class=\"code-snippet__built_in\" style=\"box-sizing: border-box;\">c<\/span>(<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0<\/span>,<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>),labels = <span class=\"code-snippet__built_in\" style=\"box-sizing: border-box;\">c<\/span>(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"alive\"<\/span>,<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"dead\"<\/span>)) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u67e5\u770b\u6570\u636e\u7ed3\u6784 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">str(df)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.47104851330203446\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/2_4E1pbtsR33mZB7aQHZibhoC7dUiczg.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWZpaBpLiaOS8UItrGKP5F15RQ6zR4E1pbtsR33mZB7aQHZibhoC7dUiczg\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"639\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5c06\u5e74\u9f84\u65b0\u589e\u4e00\u4e2a\u53d8\u91cf\u4e3a\u4e8c\u5206\u7c7b\u53d8\u91cf <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(df[,AgeCat:= as.factor(ifelse(age >=<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">65<\/span>, <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Old\"<\/span>, <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Young\"<\/span>))])<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3898573692551506\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/3_PoCLNxD4fRibYQcYuMUMiaibMpbTMQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWSpuC1RdZNafa88b8vXSbFDJjuUwPoCLNxD4fRibYQcYuMUMiaibMpbTMQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"631\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u9009\u62e9\u9884\u6d4b\u7279\u5f81 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df<-subset(df,select = <span class=\"code-snippet__built_in\" style=\"box-sizing: border-box;\">c<\/span>(-id,-study,-age,-time))<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5b9e\u73b0XGBoost<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5c06\u6570\u636e\u8f6c\u5316\u4e3a\u7a00\u758f\u77e9\u9635 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">sparse_matrix <- sparse.model.matrix(status~ ., data = df)[,-<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>] <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u67e5\u770b\u524d\u51e0\u884c <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(sparse_matrix) <\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.2703150912106136\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/4_UKTAZibAnAcyC5wdGEfnVpvlcqL2zA.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWK75ZjpztpDtmclffVPNibVnBsibUKTAZibAnAcyC5wdGEfnVpvlcqL2zA\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"603\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.33386581469648563\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/5_r8HVcuhiaVHOAs3JmZfPU8eETdKibQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxW9BMTyibDOGtk2eSVKkOUSZyicEBNr8HVcuhiaVHOAs3JmZfPU8eETdKibQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"626\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">output_vector = df[,status] == <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"dead\"<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5efa\u7acb\u6a21\u578b\uff01<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">bst <- xgboost(data = sparse_matrix, label = output_vector, max_depth = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">4<\/span>, <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> eta = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>, nthread = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">2<\/span>, nrounds =<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">10<\/span>,objective = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"survival:cox\"<\/span>)<\/span><\/code><\/pre>\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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5728\u8be5\u6a21\u578b\u4e2dnrounds\u662f\u8fed\u4ee3\u6b21\u6570\uff0c\u6570\u503c\u8d8a\u5927\u8fd0\u884c\u65f6\u95f4\u8d8a\u957f\u3002objective\u662f\u6a21\u578b\u7c7b\u578b\uff0c\u6211\u4eec\u5e38\u7528\u7684\u4e00\u822c\u662f\u4e8c\u5206\u7c7blogistics\u56de\u5f52\u548cCox\u56de\u5f52\uff0c\u8fd9\u91cc\u6211\u9009\u62e9\u540e\u8005\u3002<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u6bcf\u884c\u7684train-cox-nloglik\u4ee3\u8868\u6a21\u578b\u6548\u679c\uff0c\u4e00\u822c\u8d8a\u5c0f\u8d8a\u597d\u3002<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u4f46\u662f\u8981\u6ce8\u610f\uff0c\u5728\u8fd9\u91cc\u6211\u4eec\u89c2\u5bdf\u5230\u5728\u7b2c2\u6b21\u4e4b\u540e\u8be5\u503c\u9010\u6e10\u589e\u5927\uff0c\u8fd9\u8868\u793a\u6a21\u578b\u51fa\u73b0\u4e86\u8fc7\u5ea6\u62df\u5408\uff0c\u56e0\u6b64\uff0c\u6211\u4eec\u9009\u62e9\u8fed\u4ee3\u6b21\u65702\u6765\u6784\u5efa\u6a21\u578b<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">bst <- xgboost(data = sparse_matrix, label = output_vector, max_depth = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">4<\/span>, eta = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>, nthread = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">2<\/span>, nrounds =<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">2<\/span>,objective = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"survival:cox\"<\/span>)<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u7136\u540e\u5173\u952e\u7684\u4e00\u6b65\u5230\u4e86<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u63d0\u53d6\u53d8\u91cf\u91cd\u8981\u6027<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">importance <- xgb.importance(feature_names = colnames(sparse_matrix), model = bst)<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(importance)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3048128342245989\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/6_hEynrbOeCOK8vibHnBljHTp6L0VvDQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWqG4qiaWIibibTnQpocnzlH64GXsyhEynrbOeCOK8vibHnBljHTp6L0VvDQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"374\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">\u6211\u4eec\u5176\u5b9e\u518d\u6df1\u5165\u4e00\u70b9\u5206\u6790\u8fd9\u4e2a\u6a21\u578b\u3002\u6211\u4eec\u5df2\u7ecf\u53d1\u73b0\u54ea\u4e9b\u7279\u5f81\u53ef\u4ee5\u9884\u6d4b\u75be\u75c5\u7ed3\u5c40\u3002\u4f46\u6211\u4eec\u8fd8\u4e0d\u77e5\u9053\u8fd9\u4e9b\u7279\u5f81\u7684\u4f5c\u7528\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u60f3\u77e5\u9053\u4e0d\u540c\u6cbb\u7597\u65b9\u6848\u5bf9\u60a3\u8005\u9884\u540e\u662f\u5426\u6709\u5f71\u54cd\uff1f\u56e0\u6b64\uff0c\u6211\u4eec\u5728\u4e0a\u8ff0\u5206\u6790\u7684\u57fa\u7840\u4e0a\u6dfb\u52a0\u4e24\u4e2a\u53c2\u6570data\u548clabel\u6765\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\u3002<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">importanceRaw <- xgb.importance(feature_names = colnames(sparse_matrix), model = bst, data = sparse_matrix, label = output_vector) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">importanceClean <- importanceRaw[,`:=`(Cover=<span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">NULL<\/span>, Frequency=<span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">NULL<\/span>)] <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(importanceClean) <\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.565\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/7_On5RP2sq5XbCo879QLsPhcytMz0mwg.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWiaibN5UtAtTbyBAEsujnkY8lnGOn5RP2sq5XbCo879QLsPhcytMz0mwg\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"200\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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 style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u53ef\u4ee5\u770b\u5230\u6700\u91cd\u8981\u7684\u7279\u5f81\u5c31\u662f\u8fd9\u51e0\u4e2a\u4e86\uff01<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u7136\u540e\u6211\u4eec\u5bf9\u5176\u8fdb\u884c\u53ef\u89c6\u5316\u4e00\u4e0b<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">xgb.plot.importance(importanceClean, rel_to_first = <span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">TRUE<\/span>, xlab = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Relative importance\"<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.0417910447761194\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/8_a8xXibkHqouRlFgqxJ9BCO38zhCjkw.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWIWaGIdUibz9jL9RgEORfYcLJl6a8xXibkHqouRlFgqxJ9BCO38zhCjkw\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"335\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<p style=\"white-space: normal;margin: 0px;padding: 0px;box-sizing: border-box;\">\u6839\u636e\u8be5\u7ed3\u679c\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u5bf9\u4e8e\u9884\u6d4b\u60a3\u8005\u9884\u540e\u6700\u91cd\u8981\u7684\u524d\u4e09\u4e2a\u53d8\u91cf\u5206\u522b\u4e3anodes\u3001surg\u548cobstruct\u3002<br style=\"box-sizing: border-box;\" \/>\u96be\u9053\u5230\u8fd9\u91cc\u5c31\u5b8c\u4e86\u5417\uff1f<\/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<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<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">\u5c0f\u4f19\u4f34\u4eec\u80af\u5b9a\u4e5f\u4f1a\u8bf4\uff0c\u8fd9\u4e2a\u56fe\u4e5f\u592a\u96be\u770b\u4e86\uff01\u5f3a\u70c8\u8981\u6c42\u753b<span style=\"display: none;line-height: 0px;\">\u200d<\/span>\u597d\u770b\u4e00\u70b9\uff01\u653e\u5fc3\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u7528ggplot2\u91cd\u65b0\u753b\u4e00\u4e2a\u91cd\u8981\u6027\u8bc4\u4f30\u56fe\u3002<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\"><br \/><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u56e0\u4e3aimportanceClean\u662f\u4e00\u4e2adata.table\uff0c\u56e0\u6b64\u5148\u8f6c\u6362\u4e3a\u6570\u636e\u6846 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">data<-as.data.frame(importanceClean) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u63a5\u4e0b\u6765\u5f00\u59cb\u7ed8\u56fe\uff0c\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\uff1a <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#1.\u5982\u679c\u6211\u4eec\u4ee5Feature\u4e3ax\uff0cGain\u4e3ay\u503c\u7ed8\u5236\u6761\u5f62\u56fe\uff0c\u7ed3\u679c\u80af\u5b9a\u548c\u539f\u56fe\u4e0d\u4e00\u6837\uff0c <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u6240\u4ee5\u9700\u8981\u5bf9\u5750\u6807\u8f74\u8fdb\u884c\u8f6c\u6362\uff1b <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#2.\u4e0a\u6b21\u6211\u4eec\u4e5f\u8bf4\u5230\u53d8\u91cf\u6392\u5e8f\u7684\u4e8b\uff0c\u8fd9\u91cc\u8fd8\u662f\u7528reorder\u51fd\u6570\u5bf9y\u503c\u7531\u5927\u5230\u5c0f\u91cd\u65b0\u6392\u5e8f <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">p<-ggplot(data=data,mapping=aes(x=reorder(Feature,Gain),y=Gain\/<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0.551046708<\/span>,fill=Feature))+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> geom_bar(stat = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">'identity'<\/span>,width = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0.8<\/span>,position=position_dodge(<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0.7<\/span>))+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> scale_fill_brewer(palette =<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Set1\"<\/span>)+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> coord_flip()+<span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5750\u6807\u8f74\u53d8\u6362 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> ylab(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Variable relative importance\"<\/span>)+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> xlab(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"\"<\/span>)+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> theme_bw()+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> theme(legend.position = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"\"<\/span>) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">ggsave(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"vip.png\"<\/span>,plot = p,width = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">4.5<\/span>,height = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">5<\/span>,dpi = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">600<\/span>,units = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"in\"<\/span>,device = png)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.0298507462686568\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/9_t9O55OaOXGkoxiaJoJGBhTGwa5HOcQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWop2Bdzg6CvMc9YeqIsUh34TRTt9O55OaOXGkoxiaJoJGBhTGwa5HOcQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"402\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<p style=\"white-space: normal;margin: 0px;padding: 0px;box-sizing: border-box;\">\u8fd9\u5c31\u5b8c\u7f8e\u4e86\uff01\u4e94\u4e2a\u7279\u5f81\u7528\u4e94\u79cd\u989c\u8272\u8868\u793a\uff0c\u597d\u770b\u53c8\u5b9e\u7528\uff01<\/p>\n<section style=\"display: flex;flex-flow: row;margin: 10px 0% 20px;text-align: left;justify-content: flex-start;box-sizing: border-box;\">\n<section style=\"display: inline-block;vertical-align: top;width: auto;flex: 0 0 0%;height: auto;align-self: flex-start;line-height: 0;box-sizing: border-box;\">\n<section style=\"text-align: right;margin: 0px 0% -20px;box-sizing: border-box;\">\n<section style=\"display: inline-block;width: 8px;height: 20px;vertical-align: top;overflow: hidden;border-width: 0px;border-style: none;border-color: rgb(62, 62, 62);background-color: rgb(245, 241, 224);box-sizing: border-box;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<section style=\"text-align: center;box-sizing: border-box;\">\n<section style=\"display: inline-block;width: 16px;height: 20px;vertical-align: top;overflow: hidden;border-width: 0px;border-radius: 21px 21px 0px 0px;border-style: none;border-color: rgb(62, 62, 62);background-color: rgb(231, 215, 173);box-sizing: border-box;\"><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 style=\"display: inline-block;vertical-align: top;width: auto;background-color: rgb(245, 241, 224);flex: 100 100 0%;align-self: flex-start;height: auto;border-right: 0px rgb(62, 62, 62);border-top-right-radius: 12px;overflow: hidden;box-shadow: rgb(231, 215, 173) 0px 6px 0px;box-sizing: border-box;\">\n<section style=\"margin: 20px 0% 30px;box-sizing: border-box;\">\n<section style=\"padding: 0px 10px;box-sizing: border-box;\">\n<p style=\"margin: 0px;padding: 0px;box-sizing: border-box;\">\u603b\u7ed3\u65f6\u95f4\u5230\uff01\u53ef\u4ee5\u770b\u51faXGBoost\u7b97\u6cd5\u6574\u4f53\u4ee3\u7801\u5176\u5b9e\u5e76\u4e0d\u96be\uff0c\u4f46\u662f\u9700\u8981\u6211\u4eec\u7406\u89e3\u5176\u4e2d\u7684\u5404\u4e2a\u53c2\u6570\u7684\u610f\u4e49\uff0c\u7136\u540e\u8bad\u7ec3\u51fa\u5408\u9002\u6570\u636e\u7684\u6a21\u578b\u3002\u6240\u4ee5\uff0c\u5982\u679c\u5c0f\u4f19\u4f34\u6b63\u5728\u63a2\u7d22\u673a\u5668\u5b66\u4e60\u7684\u5965\u79d8\uff0c\u4e0d\u59a8\u7ed9XGBoost\u4e00\u4e2a\u673a\u4f1a\u3002\u6216\u8bb8\u5b83\u4f1a\u50cf\u4f60\u7684\u5f97\u529b\u52a9\u624b\uff0c\u52a9\u4f60\u5728\u6570\u636e\u7684\u6d77\u6d0b\u4e2d\u822a\u884c\uff0c\u627e\u5230\u5b9d\u85cf\uff01\u5feb\u53bb\u8bd5\u8bd5\u5427\uff01\uff08\u6700\u540e\u63a8\u8350\u4e00\u4e0b\u5927\u6d77\u54e5\u65b0\u5f00\u53d1\u7684\u96f6\u4ee3\u7801\u4e91\u751f\u4fe1\u5206\u6790\u5de5\u5177\u5e73\u53f0\u5305\u542b\u8d85\u591a\u96f6\u4ee3\u7801\u5c0f\u5de5\u5177\uff0c\u4e0a\u4f20\u6570\u636e\u4e00\u952e\u51fa\u56fe\uff0c\u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u6b22\u8fce\u6765\u53c2\u89c2\u54df\uff0c<\/p>\n<p style=\"margin: 0px;padding: 0px;box-sizing: border-box;\">\u7f51\u5740\uff1ahttp:\/\/www.biocloudservice.com\/home.html\uff09<\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<section style=\"border-bottom: 2px solid rgb(0, 150, 136);text-align: left;font-size: 12px;box-sizing: border-box;\">\n<p style=\"margin: 0px;padding: 0px;box-sizing: border-box;\"><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\/YHGRXkSxjSSYqN0u6bwwXzLCBdlX9BXOYJyjlsib6bQ74Wibtria9gSC4sqocafb5YBQcZWdQRrtP2Xo7vaFWaecA\/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\" 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border-box;\">\n<section style=\"justify-content: center;display: flex;flex-flow: row;box-sizing: border-box;\">\n<section style=\"display: inline-block;vertical-align: top;width: 50%;align-self: flex-start;flex: 0 0 auto;box-sizing: border-box;\">\n<section style=\"margin: 4px 0% 0px;box-sizing: border-box;\">\n<section style=\"display: inline-block;width: 3px;height: 3px;vertical-align: top;overflow: hidden;border-width: 0px;border-radius: 155px;border-style: none;border-color: rgb(62, 62, 62);background-color: rgb(245, 245, 245);box-sizing: border-box;\"><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 style=\"display: inline-block;vertical-align: top;width: 50%;align-self: flex-start;flex: 0 0 auto;box-sizing: border-box;\">\n<section style=\"margin: 4px 0% 0px;box-sizing: border-box;\">\n<section style=\"display: inline-block;width: 3px;height: 3px;vertical-align: top;overflow: 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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 style=\"padding: 0px 10px;letter-spacing: 2px;line-height: 1.8;box-sizing: border-box;\">\n<p style=\"white-space: normal;margin: 0px;padding: 0px;box-sizing: border-box;\"> \u55e8\uff01\u4eb2\u7231\u7684\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\uff01\u6211\u662f\u5927\u6d77\u54e5\u3002\u4eca\u5929\u5927\u6d77\u54e5\u8981\u548c\u5927\u5bb6\u804a\u804a\u673a\u5668\u5b66\u4e60\u9886\u57df\u91cc\u7684\u4e00\u9897\u95ea\u8000\u4e4b\u661f\u2728 \u2014\u2014XGBoost\u7b97\u6cd5\uff01<br style=\"box-sizing: border-box;\" \/>XGBoost\uff0c\u5168\u79f0Extreme Gradient Boosting\uff0c\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\uff0c\u6211\u4eec\u90fd\u542c\u8bf4\u8fc7\u8fd9\u53e5\u8bdd\uff0cMachine learning is changing the world! \u800cXGBoost\u66f4\u5728\u5404\u79cd\u6570\u636e\u6316\u6398\u548c\u9884\u6d4b\u4efb\u52a1\u4e2d\u8868\u73b0\u51fa\u8272\uff0c\u5b83\u4ee5\u5176\u5353\u8d8a\u7684\u6027\u80fd\u548c\u51fa\u8272\u7684\u9c81\u68d2\u6027\uff0c\u6210\u4e3a\u4f17\u591a\u6570\u636e\u79d1\u5b66\u5bb6\u548c\u673a\u5668\u5b66\u4e60\u4ece\u4e1a\u8005\u7684\u6700\u7231\u54e6\uff01\u8fd9\u4e2a\u7b97\u6cd5\u7684\u95ea\u4eae\u4e4b\u5904\u5728\u4e8e\u5b83\u7684\u68af\u5ea6\u63d0\u5347\u6846\u67b6\uff0c\u53ef\u4ee5\u5728\u5904\u7406\u5206\u7c7b\u548c\u56de\u5f52\u95ee\u9898\u65f6\u90fd\u8868\u73b0\u5f97\u76f8\u5f53\u51fa\u8272\u3002\u5b83\u4f1a\u901a\u8fc7\u591a\u8f6e\u8fed\u4ee3\uff0c\u9010\u6b65\u63d0\u5347\u9884\u6d4b\u6a21\u578b\u7684\u51c6\u786e\u6027\uff0c\u4e0d\u65ad\u4f18\u5316\u6a21\u578b\u8868\u73b0\u3002\u5c31\u50cf\u662f\u4e00\u4f4d\u806a\u660e\u7684\u5b66\u751f\uff0c\u4e0d\u65ad\u5438\u6536\u77e5\u8bc6\uff0c\u8fdb\u6b65\u7a81\u98de\u731b\u8fdb\uff01<br style=\"box-sizing: border-box;\" \/>\u5176\u8fd8\u6709\u4e00\u4e2a\u4e3b\u8981\u7279\u70b9\uff0c\u5c31\u662f\u5b83\u5bf9\u4e8e\u590d\u6742\u7684\u6570\u636e\u96c6\u548c\u9ad8\u7ef4\u7279\u5f81\u7684\u9002\u5e94\u80fd\u529b\u975e\u5e38\u5f3a\u5927\u3002\u5b83\u4e0d\u5bb9\u6613\u53d7\u5230\u8fc7\u62df\u5408\u7684\u56f0\u6270\uff0c\u800c\u4e14\u80fd\u591f\u5904\u7406\u7f3a\u5931\u503c\u548c\u5f02\u5e38\u6570\u636e\uff0c\u4f7f\u5f97\u6570\u636e\u9884\u5904\u7406\u53d8\u5f97\u76f8\u5f53\u4fbf\u6377\u3002\u5c31\u50cf\u662f\u4e00\u4f4d\u6570\u636e\u7684\u9b54\u672f\u5e08\uff0c\u603b\u80fd\u4ece\u6df7\u6c8c\u7684\u6570\u636e\u4e2d\u627e\u5230\u89c4\u5f8b\uff01\u800c\u4e14\uff0cXGBoost\u7684\u6a21\u578b\u89e3\u91ca\u6027\u4e5f\u5f88\u5f3a\uff0c\u8fd9\u610f\u5473\u7740\u4f60\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u6a21\u578b\u662f\u5982\u4f55\u505a\u51fa\u9884\u6d4b\u7684\uff0c\u4ece\u800c\u4e3a\u4e1a\u52a1\u51b3\u7b56\u63d0\u4f9b\u652f\u6301\u3002<br style=\"box-sizing: border-box;\" \/>\u90a3\u4e48\u4ecb\u7ecd\u4e86\u8fd9\u4e48\u591a\uff0c\u5c31\u8ba9\u5927\u6d77\u54e5\u5e26\u9886\u5c0f\u4f19\u4f34\u4eec\u6765\u9886\u609f\u4e00\u4e0b\u8fd9\u4e2a\u7b97\u6cd5\u7684\u9b45\u529b\u5427\uff01<\/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 style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u9996\u5148\u52a0\u8f7dR\u5305<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">require(xgboost) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">require(Matrix) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">require(data.table) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">library(survival) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">data(cancer, package=<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"survival\"<\/span>) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df <- data.table(colon, keep.rownames = <span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">FALSE<\/span>) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df<-df[<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>:<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">100<\/span>,]<span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u8fd9\u91cc\u6211\u4eec\u9009\u62e9\u524d\u4e00\u767e\u4e2a\u6570\u636e\u8fdb\u884c\u5904\u7406\uff0c\u5728\u4f7f\u7528\u81ea\u5df1\u6570\u636e\u7684\u65f6\u5019\u4e00\u5b9a\u8981\u5904\u7406\u7f3a\u5931\u503c <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(df)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3707165109034268\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/1_9Hq0ht055NPLCTyiaqq7Xaq87CRCyw.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWhV8yPyvUicqTuYNzb7Viap5Jtas9Hq0ht055NPLCTyiaqq7Xaq87CRCyw\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"642\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u628a\u7ed3\u5c40\u53d8\u91cf\u751f\u5b58\u72b6\u6001\u8f6c\u6362\u4e3a\u56e0\u5b50\u578b <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df$status<-factor(df$status,levels = <span class=\"code-snippet__built_in\" style=\"box-sizing: border-box;\">c<\/span>(<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0<\/span>,<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>),labels = <span class=\"code-snippet__built_in\" style=\"box-sizing: border-box;\">c<\/span>(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"alive\"<\/span>,<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"dead\"<\/span>)) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u67e5\u770b\u6570\u636e\u7ed3\u6784 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">str(df)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.47104851330203446\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/2_4E1pbtsR33mZB7aQHZibhoC7dUiczg.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWZpaBpLiaOS8UItrGKP5F15RQ6zR4E1pbtsR33mZB7aQHZibhoC7dUiczg\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"639\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5c06\u5e74\u9f84\u65b0\u589e\u4e00\u4e2a\u53d8\u91cf\u4e3a\u4e8c\u5206\u7c7b\u53d8\u91cf <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(df[,AgeCat:= as.factor(ifelse(age >=<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">65<\/span>, <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Old\"<\/span>, <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Young\"<\/span>))])<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3898573692551506\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/3_PoCLNxD4fRibYQcYuMUMiaibMpbTMQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWSpuC1RdZNafa88b8vXSbFDJjuUwPoCLNxD4fRibYQcYuMUMiaibMpbTMQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"631\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u9009\u62e9\u9884\u6d4b\u7279\u5f81 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">df<-subset(df,select = <span class=\"code-snippet__built_in\" style=\"box-sizing: border-box;\">c<\/span>(-id,-study,-age,-time))<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5b9e\u73b0XGBoost<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5c06\u6570\u636e\u8f6c\u5316\u4e3a\u7a00\u758f\u77e9\u9635 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">sparse_matrix <- sparse.model.matrix(status~ ., data = df)[,-<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>] <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u67e5\u770b\u524d\u51e0\u884c <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(sparse_matrix) <\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.2703150912106136\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/4_UKTAZibAnAcyC5wdGEfnVpvlcqL2zA.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWK75ZjpztpDtmclffVPNibVnBsibUKTAZibAnAcyC5wdGEfnVpvlcqL2zA\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"603\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.33386581469648563\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/5_r8HVcuhiaVHOAs3JmZfPU8eETdKibQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxW9BMTyibDOGtk2eSVKkOUSZyicEBNr8HVcuhiaVHOAs3JmZfPU8eETdKibQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"626\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">output_vector = df[,status] == <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"dead\"<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5efa\u7acb\u6a21\u578b\uff01<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">bst <- xgboost(data = sparse_matrix, label = output_vector, max_depth = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">4<\/span>, <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> eta = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>, nthread = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">2<\/span>, nrounds =<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">10<\/span>,objective = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"survival:cox\"<\/span>)<\/span><\/code><\/pre>\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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5728\u8be5\u6a21\u578b\u4e2dnrounds\u662f\u8fed\u4ee3\u6b21\u6570\uff0c\u6570\u503c\u8d8a\u5927\u8fd0\u884c\u65f6\u95f4\u8d8a\u957f\u3002objective\u662f\u6a21\u578b\u7c7b\u578b\uff0c\u6211\u4eec\u5e38\u7528\u7684\u4e00\u822c\u662f\u4e8c\u5206\u7c7blogistics\u56de\u5f52\u548cCox\u56de\u5f52\uff0c\u8fd9\u91cc\u6211\u9009\u62e9\u540e\u8005\u3002<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u6bcf\u884c\u7684train-cox-nloglik\u4ee3\u8868\u6a21\u578b\u6548\u679c\uff0c\u4e00\u822c\u8d8a\u5c0f\u8d8a\u597d\u3002<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u4f46\u662f\u8981\u6ce8\u610f\uff0c\u5728\u8fd9\u91cc\u6211\u4eec\u89c2\u5bdf\u5230\u5728\u7b2c2\u6b21\u4e4b\u540e\u8be5\u503c\u9010\u6e10\u589e\u5927\uff0c\u8fd9\u8868\u793a\u6a21\u578b\u51fa\u73b0\u4e86\u8fc7\u5ea6\u62df\u5408\uff0c\u56e0\u6b64\uff0c\u6211\u4eec\u9009\u62e9\u8fed\u4ee3\u6b21\u65702\u6765\u6784\u5efa\u6a21\u578b<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">bst <- xgboost(data = sparse_matrix, label = output_vector, max_depth = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">4<\/span>, eta = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">1<\/span>, nthread = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">2<\/span>, nrounds =<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">2<\/span>,objective = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"survival:cox\"<\/span>)<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u7136\u540e\u5173\u952e\u7684\u4e00\u6b65\u5230\u4e86<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u63d0\u53d6\u53d8\u91cf\u91cd\u8981\u6027<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">importance <- xgb.importance(feature_names = colnames(sparse_matrix), model = bst)<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(importance)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.3048128342245989\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/6_hEynrbOeCOK8vibHnBljHTp6L0VvDQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWqG4qiaWIibibTnQpocnzlH64GXsyhEynrbOeCOK8vibHnBljHTp6L0VvDQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"374\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">\u6211\u4eec\u5176\u5b9e\u518d\u6df1\u5165\u4e00\u70b9\u5206\u6790\u8fd9\u4e2a\u6a21\u578b\u3002\u6211\u4eec\u5df2\u7ecf\u53d1\u73b0\u54ea\u4e9b\u7279\u5f81\u53ef\u4ee5\u9884\u6d4b\u75be\u75c5\u7ed3\u5c40\u3002\u4f46\u6211\u4eec\u8fd8\u4e0d\u77e5\u9053\u8fd9\u4e9b\u7279\u5f81\u7684\u4f5c\u7528\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u60f3\u77e5\u9053\u4e0d\u540c\u6cbb\u7597\u65b9\u6848\u5bf9\u60a3\u8005\u9884\u540e\u662f\u5426\u6709\u5f71\u54cd\uff1f\u56e0\u6b64\uff0c\u6211\u4eec\u5728\u4e0a\u8ff0\u5206\u6790\u7684\u57fa\u7840\u4e0a\u6dfb\u52a0\u4e24\u4e2a\u53c2\u6570data\u548clabel\u6765\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\u3002<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">importanceRaw <- xgb.importance(feature_names = colnames(sparse_matrix), model = bst, data = sparse_matrix, label = output_vector) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">importanceClean <- importanceRaw[,`:=`(Cover=<span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">NULL<\/span>, Frequency=<span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">NULL<\/span>)] <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">head(importanceClean) <\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"0.565\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/7_On5RP2sq5XbCo879QLsPhcytMz0mwg.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWiaibN5UtAtTbyBAEsujnkY8lnGOn5RP2sq5XbCo879QLsPhcytMz0mwg\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"200\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" 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 style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u53ef\u4ee5\u770b\u5230\u6700\u91cd\u8981\u7684\u7279\u5f81\u5c31\u662f\u8fd9\u51e0\u4e2a\u4e86\uff01<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u7136\u540e\u6211\u4eec\u5bf9\u5176\u8fdb\u884c\u53ef\u89c6\u5316\u4e00\u4e0b<\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">xgb.plot.importance(importanceClean, rel_to_first = <span class=\"code-snippet__literal\" style=\"box-sizing: border-box;\">TRUE<\/span>, xlab = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Relative importance\"<\/span>)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.0417910447761194\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/8_a8xXibkHqouRlFgqxJ9BCO38zhCjkw.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWIWaGIdUibz9jL9RgEORfYcLJl6a8xXibkHqouRlFgqxJ9BCO38zhCjkw\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"335\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<p style=\"white-space: normal;margin: 0px;padding: 0px;box-sizing: border-box;\">\u6839\u636e\u8be5\u7ed3\u679c\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u5bf9\u4e8e\u9884\u6d4b\u60a3\u8005\u9884\u540e\u6700\u91cd\u8981\u7684\u524d\u4e09\u4e2a\u53d8\u91cf\u5206\u522b\u4e3anodes\u3001surg\u548cobstruct\u3002<br style=\"box-sizing: border-box;\" \/>\u96be\u9053\u5230\u8fd9\u91cc\u5c31\u5b8c\u4e86\u5417\uff1f<\/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<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<li><\/li>\n<li><\/li>\n<li><\/li>\n<li><\/li>\n<\/ul>\n<pre class=\"code-snippet__js\" data-lang=\"r\"><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">\u5c0f\u4f19\u4f34\u4eec\u80af\u5b9a\u4e5f\u4f1a\u8bf4\uff0c\u8fd9\u4e2a\u56fe\u4e5f\u592a\u96be\u770b\u4e86\uff01\u5f3a\u70c8\u8981\u6c42\u753b<span style=\"display: none;line-height: 0px;\">\u200d<\/span>\u597d\u770b\u4e00\u70b9\uff01\u653e\u5fc3\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u7528ggplot2\u91cd\u65b0\u753b\u4e00\u4e2a\u91cd\u8981\u6027\u8bc4\u4f30\u56fe\u3002<\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\"><br \/><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u56e0\u4e3aimportanceClean\u662f\u4e00\u4e2adata.table\uff0c\u56e0\u6b64\u5148\u8f6c\u6362\u4e3a\u6570\u636e\u6846 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">data<-as.data.frame(importanceClean) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u63a5\u4e0b\u6765\u5f00\u59cb\u7ed8\u56fe\uff0c\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\uff1a <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#1.\u5982\u679c\u6211\u4eec\u4ee5Feature\u4e3ax\uff0cGain\u4e3ay\u503c\u7ed8\u5236\u6761\u5f62\u56fe\uff0c\u7ed3\u679c\u80af\u5b9a\u548c\u539f\u56fe\u4e0d\u4e00\u6837\uff0c <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u6240\u4ee5\u9700\u8981\u5bf9\u5750\u6807\u8f74\u8fdb\u884c\u8f6c\u6362\uff1b <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"><span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#2.\u4e0a\u6b21\u6211\u4eec\u4e5f\u8bf4\u5230\u53d8\u91cf\u6392\u5e8f\u7684\u4e8b\uff0c\u8fd9\u91cc\u8fd8\u662f\u7528reorder\u51fd\u6570\u5bf9y\u503c\u7531\u5927\u5230\u5c0f\u91cd\u65b0\u6392\u5e8f <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">p<-ggplot(data=data,mapping=aes(x=reorder(Feature,Gain),y=Gain\/<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0.551046708<\/span>,fill=Feature))+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> geom_bar(stat = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">'identity'<\/span>,width = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0.8<\/span>,position=position_dodge(<span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">0.7<\/span>))+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> scale_fill_brewer(palette =<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Set1\"<\/span>)+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> coord_flip()+<span class=\"code-snippet__comment\" style=\"box-sizing: border-box;\">#\u5750\u6807\u8f74\u53d8\u6362 <\/span><\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> ylab(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"Variable relative importance\"<\/span>)+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> xlab(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"\"<\/span>)+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> theme_bw()+ <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\"> theme(legend.position = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"\"<\/span>) <\/span><\/code><code style=\"box-sizing: border-box;\"><span class=\"code-snippet_outer\" style=\"box-sizing: border-box;\">ggsave(<span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"vip.png\"<\/span>,plot = p,width = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">4.5<\/span>,height = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">5<\/span>,dpi = <span class=\"code-snippet__number\" style=\"box-sizing: border-box;\">600<\/span>,units = <span class=\"code-snippet__string\" style=\"box-sizing: border-box;\">\"in\"<\/span>,device = png)<\/span><\/code><\/pre>\n<\/section>\n<section style=\"text-align: center;margin-top: 10px;margin-bottom: 10px;line-height: 0;box-sizing: border-box;\">\n<section style=\"max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;\"><img decoding=\"async\" class=\"rich_pages wxw-img\" data-ratio=\"1.0298507462686568\" data-s=\"300,640\" src=\"https:\/\/i0.wp.com\/www.biocloudservice.com\/wordpress\/wp-content\/uploads\/2024\/06\/9_t9O55OaOXGkoxiaJoJGBhTGwa5HOcQ.png?w=640\" onerror=\"this.src='https:\/\/mmbiz.qpic.cn\/mmbiz_png\/YHGRXkSxjSTuIdgGxzv1F4vBwGwljOxWop2Bdzg6CvMc9YeqIsUh34TRTt9O55OaOXGkoxiaJoJGBhTGwa5HOcQ\/640?wx_fmt=png'\" data-type=\"png\" data-w=\"402\" style=\"vertical-align: middle;max-width: 100%;width: 100%;box-sizing: border-box;\" data-recalc-dims=\"1\" \/><\/section>\n<\/section>\n<p style=\"white-space: normal;margin: 0px;padding: 0px;box-sizing: border-box;\">\u8fd9\u5c31\u5b8c\u7f8e\u4e86\uff01\u4e94\u4e2a\u7279\u5f81\u7528\u4e94\u79cd\u989c\u8272\u8868\u793a\uff0c\u597d\u770b\u53c8\u5b9e\u7528\uff01<\/p>\n<section style=\"display: flex;flex-flow: row;margin: 10px 0% 20px;text-align: left;justify-content: flex-start;box-sizing: border-box;\">\n<section style=\"display: inline-block;vertical-align: top;width: auto;flex: 0 0 0%;height: auto;align-self: flex-start;line-height: 0;box-sizing: border-box;\">\n<section style=\"text-align: right;margin: 0px 0% -20px;box-sizing: border-box;\">\n<section style=\"display: inline-block;width: 8px;height: 20px;vertical-align: top;overflow: hidden;border-width: 0px;border-style: none;border-color: rgb(62, 62, 62);background-color: rgb(245, 241, 224);box-sizing: border-box;\"><svg viewbox=\"0 0 1 1\" style=\"float:left;line-height:0;width:0;vertical-align:top;\"><\/svg><\/section>\n<\/section>\n<section style=\"text-align: center;box-sizing: border-box;\">\n<section style=\"display: inline-block;width: 16px;height: 20px;vertical-align: top;overflow: hidden;border-width: 0px;border-radius: 21px 21px 0px 0px;border-style: none;border-color: rgb(62, 62, 62);background-color: rgb(231, 215, 173);box-sizing: border-box;\"><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 style=\"display: inline-block;vertical-align: top;width: 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