{"id":47303,"date":"2025-07-30T07:17:21","date_gmt":"2025-07-29T23:17:21","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/47303.html"},"modified":"2025-07-30T07:17:21","modified_gmt":"2025-07-29T23:17:21","slug":"sklearn-%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0-%e5%86%b3%e7%ad%96%e6%a0%91-%e7%bd%91%e6%a0%bc%e6%90%9c%e7%b4%a2%e8%8e%b7%e5%be%97%e6%9c%80%e4%bc%98%e5%8f%82%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/47303.html","title":{"rendered":"Sklearn \u673a\u5668\u5b66\u4e60 \u51b3\u7b56\u6811 \u7f51\u683c\u641c\u7d22\u83b7\u5f97\u6700\u4f18\u53c2\u6570"},"content":{"rendered":"<p>\ud83d\udc96\u4eb2\u7231\u7684\u6280\u672f\u7231\u597d\u8005\u4eec\uff0c\u70ed\u70c8\u6b22\u8fce\u6765\u5230 Kant2048 \u7684\u535a\u5ba2\uff01\u6211\u662f Thomas Kant\uff0c\u5f88\u5f00\u5fc3\u80fd\u5728CSDN\u4e0a\u4e0e\u4f60\u4eec\u76f8\u9047\uff5e\ud83d\udc96<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729231719-6889567fb93c5.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n<p>\u672c\u535a\u5ba2\u7684\u7cbe\u534e\u4e13\u680f\uff1a \u3010\u81ea\u52a8\u5316\u6d4b\u8bd5\u3011 \u3010\u6d4b\u8bd5\u7ecf\u9a8c\u3011 \u3010\u4eba\u5de5\u667a\u80fd\u3011 \u3010Python\u3011<\/p>\n<hr>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729231720-688956802787e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n<h2>Sklearn \u673a\u5668\u5b66\u4e60\uff1a\u51b3\u7b56\u6811 + \u7f51\u683c\u641c\u7d22\u83b7\u5f97\u6700\u4f18\u53c2\u6570<\/h2>\n<p>\u51b3\u7b56\u6811\uff08Decision Tree\uff09\u662f\u4e00\u79cd\u76f4\u89c2\u3001\u6613\u4e8e\u7406\u89e3\u7684\u673a\u5668\u5b66\u4e60\u6a21\u578b\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5206\u7c7b\u4e0e\u56de\u5f52\u4efb\u52a1\u4e2d\u3002\u5176\u5173\u952e\u5728\u4e8e\u8d85\u53c2\u6570\u8bbe\u7f6e\uff0c\u4e0d\u540c\u7684\u914d\u7f6e\u5bf9\u6a21\u578b\u6548\u679c\u6709\u663e\u8457\u5f71\u54cd\u3002<\/p>\n<p>\u672c\u6587\u5c06\u4f7f\u7528 Sklearn \u63d0\u4f9b\u7684 GridSearchCV \u7f51\u683c\u641c\u7d22\u4ea4\u53c9\u9a8c\u8bc1\u5de5\u5177\uff0c\u7cfb\u7edf\u6027\u5730\u5bfb\u627e\u6700\u4f18\u53c2\u6570\u7ec4\u5408\uff0c\u5e76\u5728\u7ecf\u5178\u7684 Iris \u9e22\u5c3e\u82b1\u6570\u636e\u96c6 \u4e0a\u6f14\u793a\u5b8c\u6574\u6d41\u7a0b\u3002<\/p>\n<hr>\n<h3>\ud83c\udf31 \u4e00\u3001\u51c6\u5907\u5de5\u4f5c\uff1a\u52a0\u8f7d\u6570\u636e\u4e0e\u5e93<\/h3>\n<p><span class=\"token keyword\">from<\/span> sklearn<span class=\"token punctuation\">.<\/span>datasets <span class=\"token keyword\">import<\/span> load_iris<br \/>\n<span class=\"token keyword\">from<\/span> sklearn<span class=\"token punctuation\">.<\/span>model_selection <span class=\"token keyword\">import<\/span> train_test_split<span class=\"token punctuation\">,<\/span> GridSearchCV<br \/>\n<span class=\"token keyword\">from<\/span> sklearn<span class=\"token punctuation\">.<\/span>tree <span class=\"token keyword\">import<\/span> DecisionTreeClassifier<br \/>\n<span class=\"token keyword\">from<\/span> sklearn<span class=\"token punctuation\">.<\/span>metrics <span class=\"token keyword\">import<\/span> classification_report<span class=\"token punctuation\">,<\/span> accuracy_score<br \/>\n<span class=\"token keyword\">import<\/span> pandas <span class=\"token keyword\">as<\/span> pd<\/p>\n<h4>\u52a0\u8f7d\u6570\u636e\u5e76\u5207\u5206\u8bad\u7ec3\u96c6\u4e0e\u6d4b\u8bd5\u96c6\uff1a<\/h4>\n<p><span class=\"token comment\"># \u52a0\u8f7d Iris \u6570\u636e\u96c6<\/span><br \/>\niris <span class=\"token operator\">=<\/span> load_iris<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\nX <span class=\"token operator\">=<\/span> iris<span class=\"token punctuation\">.<\/span>data<br \/>\ny <span class=\"token operator\">=<\/span> iris<span class=\"token punctuation\">.<\/span>target<\/p>\n<p><span class=\"token comment\"># \u5206\u5c42\u62bd\u6837\u5212\u5206\u8bad\u7ec3\u96c6\u4e0e\u6d4b\u8bd5\u96c6\uff08\u4fdd\u6301\u7c7b\u522b\u5206\u5e03\u4e00\u81f4\uff09<\/span><br \/>\nX_train<span class=\"token punctuation\">,<\/span> X_test<span class=\"token punctuation\">,<\/span> y_train<span class=\"token punctuation\">,<\/span> y_test <span class=\"token operator\">=<\/span> train_test_split<span class=\"token punctuation\">(<\/span><br \/>\n    X<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">,<\/span> test_size<span class=\"token operator\">=<\/span><span class=\"token number\">0.2<\/span><span class=\"token punctuation\">,<\/span> stratify<span class=\"token operator\">=<\/span>y<span class=\"token punctuation\">,<\/span> random_state<span class=\"token operator\">=<\/span><span class=\"token number\">42<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u6253\u5370\u6570\u636e\u6982\u51b5<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb449\u6b21\uff0c\u70b9\u8d5e10\u6b21\uff0c\u6536\u85cf13\u6b21\u3002\u4f7f\u7528 Sklearn \u7684\u51b3\u7b56\u6811\u548c\u7f51\u683c\u641c\u7d22\u4f18\u5316\u6a21\u578b\u53c2\u6570\u7684\u65b9\u6cd5\u3002<\/p>\n","protected":false},"author":2,"featured_media":47301,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3676,50,3408,207],"topic":[],"class_list":["post-47303","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-sklearn","tag-50","tag-3408","tag-207"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sklearn \u673a\u5668\u5b66\u4e60 \u51b3\u7b56\u6811 \u7f51\u683c\u641c\u7d22\u83b7\u5f97\u6700\u4f18\u53c2\u6570 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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