{"id":180243,"date":"2024-05-08T20:31:36","date_gmt":"2024-05-08T12:31:36","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/180243.html"},"modified":"2024-05-08T20:31:40","modified_gmt":"2024-05-08T12:31:40","slug":"r%e8%af%ad%e8%a8%80%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0roc%e7%9b%b8%e5%85%b3%e7%bb%9f%e8%ae%a1%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/180243.html","title":{"rendered":"R\u8bed\u8a00\u5982\u4f55\u5b9e\u73b0ROC\u76f8\u5173\u7edf\u8ba1\u5206\u6790"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27065350\/b71a3421-d7e2-4634-8dc1-8f31b6bd1b78.webp\" alt=\"R\u8bed\u8a00\u5982\u4f55\u5b9e\u73b0ROC\u76f8\u5173\u7edf\u8ba1\u5206\u6790\" \/><\/p>\n<p><h3>ROC\uff08Receiver Operating Characteristic\uff09\u66f2\u7ebf\u662f\u8bc4\u4ef7\u4e8c\u5206\u7c7b\u6a21\u578b\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\uff0c\u901a\u8fc7\u7edf\u8ba1\u5206\u6790\u4e2d\u7684\u771f\u6b63\u4f8b\u7387\uff08TPR\uff09\u548c\u5047\u6b63\u4f8b\u7387\uff08FPR\uff09\u6765\u63cf\u7ed8\u6a21\u578b\u7684\u6027\u80fd\u3002<strong>\u5728R\u8bed\u8a00\u4e2d\uff0c\u5b9e\u73b0ROC\u76f8\u5173\u7edf\u8ba1\u5206\u6790\u7684\u6838\u5fc3\u6b65\u9aa4\u5305\u62ec\uff1a\u52a0\u8f7d\u9002\u5f53\u7684\u5305\u3001\u51c6\u5907\u6570\u636e\u3001\u8ba1\u7b97ROC\u6307\u6807\u3001\u7ed8\u5236ROC\u66f2\u7ebf<\/strong>\uff0c\u4ee5\u53ca<strong>ROC\u66f2\u7ebf\u4e0b\u9762\u79ef\uff08AUC\uff09\u7684\u8bc4\u4f30<\/strong>\u3002\u5176\u4e2d\uff0c<strong>\u7ed8\u5236ROC\u66f2\u7ebf<\/strong>\u662f\u76f4\u89c2\u5c55\u793a\u6a21\u578b\u5206\u7c7b\u80fd\u529b\u7684\u91cd\u8981\u624b\u6bb5\uff0c\u901a\u8fc7\u8be5\u66f2\u7ebf\uff0c\u4e0d\u4ec5\u53ef\u4ee5\u8bc4\u4f30\u6a21\u578b\u6574\u4f53\u7684\u6548\u80fd\uff0c\u8fd8\u53ef\u4ee5\u5e2e\u52a9\u9009\u62e9\u6700\u4f73\u7684\u9608\u503c\u3002<\/h3>\n<\/p>\n<p><p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u5982\u4f55\u5728R\u8bed\u8a00\u4e2d\u6267\u884c\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u4ece\u800c\u6709\u6548\u5730\u8fdb\u884cROC\u76f8\u5173\u7684\u7edf\u8ba1\u5206\u6790\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u52a0\u8f7d\u6240\u9700\u7684\u5e93<\/h3>\n<\/p>\n<p><p>\u4e3a\u4e86\u5b9e\u73b0ROC\u5206\u6790\uff0c<strong>\u9996\u5148\u9700\u8981\u5b89\u88c5\u5e76\u52a0\u8f7d<code>pROC<\/code>\u5305<\/strong>\uff0c\u8fd9\u662fR\u8bed\u8a00\u4e2d\u6700\u5e38\u7528\u7684\u5904\u7406\u548c\u5c55\u793aROC\u66f2\u7ebf\u7684\u5305\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">if (!requireNamespace(&quot;pROC&quot;, quietly = TRUE)) install.packages(&quot;pROC&quot;)<\/p>\n<p>library(pROC)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u6b64\u5916\uff0c\u6839\u636e\u6570\u636e\u5904\u7406\u9700\u8981\uff0c\u53ef\u80fd\u8fd8\u9700\u52a0\u8f7d\u5176\u4ed6\u5305\u5982<code>dplyr<\/code>\u6216<code>tidyverse<\/code>\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u51c6\u5907\u6570\u636e<\/h3>\n<\/p>\n<p><p>\u5728\u8fdb\u884cROC\u5206\u6790\u524d\uff0c\u9700\u786e\u4fdd\u6570\u636e\u88ab\u9002\u5f53\u5730\u51c6\u5907\u3002\u8fd9\u5305\u62ec\u9009\u62e9\u4f60\u7684\u54cd\u5e94\u53d8\u91cf\uff08\u901a\u5e38\u662f\u5b9e\u9645\u7684\u5206\u7c7b\u7ed3\u679c\uff09\u53ca\u9884\u6d4b\u6982\u7387\uff08\u7531\u6a21\u578b\u751f\u6210\u7684\u9884\u6d4b\uff09\u3002\u4ee5\u4e0b\u662f\u6570\u636e\u51c6\u5907\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-R\"># \u793a\u4f8b\u6570\u636e<\/p>\n<p>data &lt;- data.frame(<\/p>\n<p>  actual = c(1, 0, 1, 0, 1, 1, 0, 0, 1, 0),<\/p>\n<p>  predicted = c(0.9, 0.4, 0.76, 0.35, 0.8, 0.92, 0.2, 0.5, 0.85, 0.3)<\/p>\n<p>)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e09\u3001\u8ba1\u7b97ROC\u6307\u6807<\/h3>\n<\/p>\n<p><p><strong>\u5728\u51c6\u5907\u597d\u6570\u636e\u4e4b\u540e\uff0c\u4e0b\u4e00\u6b65\u662f\u5229\u7528<code>roc()<\/code>\u51fd\u6570\u4ece<code>pROC<\/code>\u5305\u4e2d\u8ba1\u7b97ROC\u6307\u6807<\/strong>\u3002\u8fd9\u6d89\u53ca\u6307\u5b9a\u54cd\u5e94\u53d8\u91cf\u548c\u9884\u6d4b\u6982\u7387\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">roc_obj &lt;- roc(data$actual, data$predicted)<\/p>\n<p>print(roc_obj)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u7ed8\u5236ROC\u66f2\u7ebf<\/h3>\n<\/p>\n<p><p>\u6709\u4e86ROC\u5bf9\u8c61\u540e\uff0c\u63a5\u4e0b\u6765\u53ef\u4ee5\u7ed8\u5236ROC\u66f2\u7ebf\u3002\u8fd9\u4e00\u6b65\u662f\u901a\u8fc7<code>plot()<\/code>\u51fd\u6570\u5b9e\u73b0\uff0c\u53ef\u4ee5\u76f4\u89c2\u5730\u5c55\u793a\u6a21\u578b\u7684\u6027\u80fd\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">plot(roc_obj, m<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>n=&quot;ROC Curve&quot;, col=&quot;#1c61b6&quot;, lwd=2)<\/p>\n<p>abline(a=0, b=1, lty=2, col=&quot;gray&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e94\u3001\u8bc4\u4f30ROC\u66f2\u7ebf\u4e0b\u9762\u79ef\uff08AUC\uff09<\/h3>\n<\/p>\n<p><p>\u6700\u540e\uff0c\u901a\u8fc7\u8ba1\u7b97ROC\u66f2\u7ebf\u4e0b\u7684\u9762\u79ef\uff08AUC\uff09\uff0c\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u5355\u4e00\u7684\u6027\u80fd\u6307\u6807\u6765\u7efc\u5408\u8bc4\u4f30\u6a21\u578b\u7684\u6027\u80fd\u3002<strong>AUC\u503c\u8d8a\u63a5\u8fd11\uff0c\u8868\u660e\u6a21\u578b\u7684\u5206\u7c7b\u6027\u80fd\u8d8a\u597d<\/strong>\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">auc(roc_obj)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4ee5\u4e0a\u6b65\u9aa4\u4e3aR\u8bed\u8a00\u4e2d\u5b9e\u73b0ROC\u76f8\u5173\u7edf\u8ba1\u5206\u6790\u7684\u57fa\u672c\u6846\u67b6\u3002\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u53ef\u4ee5\u6df1\u5165\u4e86\u89e3\u6a21\u578b\u7684\u5206\u7c7b\u80fd\u529b\uff0c\u5bf9\u6a21\u578b\u8fdb\u884c\u51c6\u786e\u7684\u8bc4\u4ef7\u548c\u9009\u62e9\u3002\u6b64\u5916\uff0c\u8fdb\u9636\u7684\u7528\u6237\u8fd8\u53ef\u4ee5\u63a2\u7d22\u4e0d\u540c\u7684\u9608\u503c\u5bf9\u6a21\u578b\u6027\u80fd\u7684\u5f71\u54cd\uff0c\u4ee5\u53ca\u5982\u4f55\u5229\u7528ROC\u5206\u6790\u6765\u63d0\u5347\u6a21\u578b\u7684\u5b9e\u7528\u6027\u548c\u51c6\u786e\u5ea6\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. \u5728R\u8bed\u8a00\u4e2d\uff0c\u5982\u4f55\u8ba1\u7b97\u548c\u7ed8\u5236ROC\u66f2\u7ebf\uff1f<\/strong><\/p>\n<p>ROC\uff08Receiver Operating Characteristic\uff09\u66f2\u7ebf\u662f\u8861\u91cf\u5206\u7c7b\u6a21\u578b\u6027\u80fd\u7684\u4e00\u79cd\u5e38\u7528\u65b9\u6cd5\u3002\u5728R\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528pROC\u5305\u6765\u8ba1\u7b97\u548c\u7ed8\u5236ROC\u66f2\u7ebf\u3002\u9996\u5148\uff0c\u9700\u8981\u5c06\u6a21\u578b\u7684\u9884\u6d4b\u6982\u7387\u6216\u5206\u7c7b\u5f97\u5206\u4e0e\u771f\u5b9e\u5206\u7c7b\u6807\u7b7e\u8fdb\u884c\u6bd4\u8f83\u3002\u7136\u540e\uff0c\u4f7f\u7528roc()\u51fd\u6570\u8ba1\u7b97ROC\u66f2\u7ebf\u7684\u654f\u611f\u5ea6\u548c\u7279\u5f02\u5ea6\uff0c\u5e76\u4f7f\u7528plot()\u51fd\u6570\u7ed8\u5236ROC\u66f2\u7ebf\u3002<\/p>\n<p><strong>2. R\u8bed\u8a00\u4e2d\u5982\u4f55\u8ba1\u7b97AUC\u503c\u548c\u9009\u62e9\u6700\u4f73\u9608\u503c\uff1f<\/strong><\/p>\n<p>AUC\uff08Area Under the ROC Curve\uff09\u662fROC\u66f2\u7ebf\u4e0b\u7684\u9762\u79ef\uff0c\u7528\u4e8e\u8bc4\u4f30\u5206\u7c7b\u6a21\u578b\u7684\u6027\u80fd\u3002\u5728R\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7pROC\u5305\u7684roc()\u51fd\u6570\u8ba1\u7b97AUC\u503c\u3002\u4f7f\u7528roc()\u51fd\u6570\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7auc()\u51fd\u6570\u83b7\u53d6AUC\u503c\u3002\u9009\u62e9\u6700\u4f73\u9608\u503c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528coord()\u51fd\u6570\u83b7\u53d6\u4e0d\u540c\u9608\u503c\u4e0b\u7684\u654f\u611f\u5ea6\u548c\u7279\u5f02\u5ea6\uff0c\u5e76\u9009\u62e9\u4f7f\u5f97\u654f\u611f\u5ea6\u548c\u7279\u5f02\u5ea6\u5e73\u8861\u7684\u9608\u503c\u3002<\/p>\n<p><strong>3. \u4f7f\u7528R\u8bed\u8a00\u8fdb\u884cROC\u66f2\u7ebf\u6bd4\u8f83\u548c\u6a21\u578b\u9009\u62e9\u7684\u65b9\u6cd5\u6709\u54ea\u4e9b\uff1f<\/strong><\/p>\n<p>\u5728R\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528pROC\u5305\u8fdb\u884cROC\u66f2\u7ebf\u6bd4\u8f83\u548c\u6a21\u578b\u9009\u62e9\u3002\u9996\u5148\uff0c\u53ef\u4ee5\u4f7f\u7528roc.test()\u51fd\u6570\u8fdb\u884cROC\u66f2\u7ebf\u4e4b\u95f4\u7684\u6bd4\u8f83\uff0c\u8be5\u51fd\u6570\u4f1a\u8fd4\u56de\u4e0d\u540c\u66f2\u7ebf\u4e4b\u95f4\u7684\u663e\u8457\u6027\u5dee\u5f02\u3002\u5176\u6b21\uff0c\u53ef\u4ee5\u4f7f\u7528roc.multiroc()\u51fd\u6570\u8fdb\u884c\u591a\u4e2a\u6a21\u578b\u7684ROC\u66f2\u7ebf\u6bd4\u8f83\u548c\u6a21\u578b\u9009\u62e9\u3002\u8be5\u51fd\u6570\u53ef\u4ee5\u8ba1\u7b97\u591a\u4e2a\u6a21\u578b\u7684AUC\u503c\uff0c\u5e76\u4f7f\u7528wilcox.test()\u51fd\u6570\u8fdb\u884c\u4e24\u4e24\u6bd4\u8f83\uff0c\u627e\u51fa\u5177\u6709\u6700\u4f73\u6027\u80fd\u7684\u6a21\u578b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"ROC\uff08Receiver Operating Characteristic\uff09\u66f2\u7ebf\u662f\u8bc4\u4ef7\u4e8c\u5206\u7c7b\u6a21\u578b\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177 [&hellip;]","protected":false},"author":3,"featured_media":180249,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/180243"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=180243"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/180243\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/180249"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=180243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=180243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=180243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}