{"id":9683,"date":"2024-03-15T03:32:43","date_gmt":"2024-03-14T18:32:43","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/python%e3%81%aetrain_test_split%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2025-08-04T03:06:42","modified_gmt":"2025-08-03T18:06:42","slug":"python%e3%81%aetrain_test_split%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/python%e3%81%aetrain_test_split%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"Python train_test_split\u306e\u4f7f\u3044\u65b9\u3010\u30c7\u30fc\u30bf\u5206\u5272\u306e\u57fa\u672c\u3011"},"content":{"rendered":"<p>train_test_split\u95a2\u6570\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8\u30bb\u30c3\u30c8\u306b\u5206\u5272\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002Python\u3067\u306f\u3001train_test_split\u95a2\u6570\u306f\u3001model_selection\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066sklearn\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u7c21\u5358\u306a\u4f8b\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">from<\/span> sklearn.model_selection <span class=\"hljs-keyword\">import<\/span> train_test_split\r\n<span class=\"hljs-keyword\">import<\/span> numpy <span class=\"hljs-keyword\">as<\/span> np\r\n\r\n<span class=\"hljs-comment\"># \u751f\u6210\u4e00\u4e9b\u793a\u4f8b\u6570\u636e<\/span>\r\nX = np.array([[<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>], [<span class=\"hljs-number\">3<\/span>, <span class=\"hljs-number\">4<\/span>], [<span class=\"hljs-number\">5<\/span>, <span class=\"hljs-number\">6<\/span>], [<span class=\"hljs-number\">7<\/span>, <span class=\"hljs-number\">8<\/span>]])\r\ny = np.array([<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">1<\/span>])\r\n\r\n<span class=\"hljs-comment\"># \u5c06\u6570\u636e\u96c6\u5212\u5206\u4e3a\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6\uff0ctest_size\u6307\u5b9a\u6d4b\u8bd5\u96c6\u6bd4\u4f8b\uff0crandom_state\u8bbe\u7f6e\u968f\u673a\u79cd\u5b50<\/span>\r\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=<span class=\"hljs-number\">0.2<\/span>, random_state=<span class=\"hljs-number\">42<\/span>)\r\n\r\n<span class=\"hljs-comment\"># \u6253\u5370\u5212\u5206\u540e\u7684\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6<\/span>\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-string\">\"\u8bad\u7ec3\u96c6X:\"<\/span>, X_train)\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-string\">\"\u6d4b\u8bd5\u96c6X:\"<\/span>, X_test)\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-string\">\"\u8bad\u7ec3\u96c6y:\"<\/span>, y_train)\r\n<span class=\"hljs-built_in\">print<\/span>(<span class=\"hljs-string\">\"\u6d4b\u8bd5\u96c6y:\"<\/span>, y_test)\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u30014\u3064\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u542b\u3080\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8X\u3068\u305d\u306e\u5bfe\u5fdc\u3059\u308b\u30e9\u30d9\u30eby\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001train_test_split\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8\u30bb\u30c3\u30c8\u306b\u5206\u5272\u3057\u3001test_size\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3067\u30c6\u30b9\u30c8\u30bb\u30c3\u30c8\u306e\u5272\u5408\u3092\u6307\u5b9a\u3057\u307e\u3059\uff08\u3053\u3053\u3067\u306f0.2\u3001\u3064\u307e\u308a20\uff05\uff09\u3001random_state\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3067\u30e9\u30f3\u30c0\u30e0\u30b7\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u3066\u5206\u5272\u7d50\u679c\u306e\u4e00\u8cab\u6027\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u5206\u5272\u5f8c\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8\u30bb\u30c3\u30c8\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>train_test_split\u95a2\u6570\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8\u30bb\u30c3\u30c8\u306b\u5206\u5272\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002Python\u3067\u306f\u3001train_test_split\u95a2\u6570\u306f\u3001model_selection\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[31,28,4135,1402,30],"class_list":["post-9683","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-python","tag-scikit-learn","tag-train_test_split","tag-1402","tag-30"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python train_test_split\u306e\u4f7f\u3044\u65b9\u3010\u30c7\u30fc\u30bf\u5206\u5272\u306e\u57fa\u672c\u3011 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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