{"id":1174,"date":"2023-07-27T09:50:11","date_gmt":"2023-07-27T09:50:11","guid":{"rendered":"https:\/\/statorials.org\/ja\/k-%e5%88%86%e5%89%b2%e4%ba%a4%e5%b7%ae%e6%a4%9c%e8%a8%bc\/"},"modified":"2023-07-27T09:50:11","modified_gmt":"2023-07-27T09:50:11","slug":"k-%e5%88%86%e5%89%b2%e4%ba%a4%e5%b7%ae%e6%a4%9c%e8%a8%bc","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/k-%e5%88%86%e5%89%b2%e4%ba%a4%e5%b7%ae%e6%a4%9c%e8%a8%bc\/","title":{"rendered":"K-fold \u76f8\u4e92\u691c\u8a3c\u306e\u7c21\u5358\u306a\u30ac\u30a4\u30c9"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u5bfe\u3059\u308b\u30e2\u30c7\u30eb\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8a55\u4fa1\u3059\u308b\u306b\u306f\u3001\u30e2\u30c7\u30eb\u306b\u3088\u3063\u3066\u884c\u308f\u308c\u305f\u4e88\u6e2c\u304c\u89b3\u5bdf\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3068\u3069\u306e\u7a0b\u5ea6\u4e00\u81f4\u3059\u308b\u304b\u3092\u6e2c\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u3053\u308c\u3092\u6e2c\u5b9a\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\u3055\u308c\u308b\u5e73\u5747\u4e8c\u4e57\u8aa4\u5dee (MSE) \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE = (1\/n)*\u03a3(y <sub>i<\/sub> \u2013 f(x <sub>i<\/sub> )) <sup>2<\/sup><\/span><\/p>\n<p><span style=\"color: #000000;\">\u91d1\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>n:<\/strong>\u89b3\u6e2c\u5024\u306e\u7dcf\u6570<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>y <sub>i<\/sub> :<\/strong> <sup>i \u756a\u76ee<\/sup>\u306e\u89b3\u6e2c\u5024\u306e\u5fdc\u7b54\u5024<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>f( <sub>xi<\/sub> ):<\/strong> i<sup>\u756a\u76ee<\/sup>\u306e\u89b3\u6e2c\u5024\u306e\u4e88\u6e2c\u5fdc\u7b54\u5024<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u30e2\u30c7\u30eb\u306e\u4e88\u6e2c\u304c\u89b3\u6e2c\u5024\u306b\u8fd1\u3065\u304f\u307b\u3069\u3001MSE \u306f\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5b9f\u969b\u306b\u306f\u3001\u6b21\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u30e2\u30c7\u30eb\u306e MSE \u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1.<\/strong>\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\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>2.<\/strong>\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0 \u30bb\u30c3\u30c8\u306e\u30c7\u30fc\u30bf\u306e\u307f\u3092\u4f7f\u7528\u3057\u3066\u30e2\u30c7\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>3.<\/strong>\u30e2\u30c7\u30eb\u3092\u4f7f\u7528\u3057\u3066\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u306b\u95a2\u3059\u308b\u4e88\u6e2c\u3092\u884c\u3044\u3001\u30c6\u30b9\u30c8\u306e MSE \u3092\u6e2c\u5b9a\u3057\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE \u30c6\u30b9\u30c8\u306b\u3088\u308a\u3001\u30e2\u30c7\u30eb\u304c\u3053\u308c\u307e\u3067\u306b\u898b\u305f\u3053\u3068\u306e\u306a\u3044\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066\u3069\u306e\u7a0b\u5ea6\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u767a\u63ee\u3059\u308b\u304b\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5358\u4e00\u306e\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306e\u6b20\u70b9\u306f\u3001MSE \u30c6\u30b9\u30c8\u304c\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0 \u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u3067\u4f7f\u7528\u3055\u308c\u308b\u89b3\u6e2c\u5024\u306b\u5fdc\u3058\u3066\u5927\u304d\u304f\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u3067\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u3053\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b 1 \u3064\u306e\u65b9\u6cd5\u306f\u3001\u6bce\u56de\u7570\u306a\u308b\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0 \u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u30e2\u30c7\u30eb\u3092\u8907\u6570\u56de\u9069\u5408\u3055\u305b\u3001\u3059\u3079\u3066\u306e\u30c6\u30b9\u30c8 MSE \u306e\u5e73\u5747\u3068\u3057\u3066\u30c6\u30b9\u30c8 MSE \u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u3053\u306e\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f\u4ea4\u5dee\u691c\u8a3c\u3068\u3057\u3066\u77e5\u3089\u308c\u3066\u304a\u308a\u3001\u305d\u306e\u7279\u5b9a\u306e\u5f62\u5f0f\u306f<b>k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c<\/b>\u3068\u3057\u3066\u77e5\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>K\u30d5\u30a9\u30fc\u30eb\u30c9\u76f8\u4e92\u691c\u8a3c<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\"><strong>K \u5206\u5272\u76f8\u4e92\u691c\u8a3c<\/strong>\u3067\u306f\u3001\u6b21\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u4f7f\u7528\u3057\u3066\u30e2\u30c7\u30eb\u3092\u8a55\u4fa1\u3057\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u30b9\u30c6\u30c3\u30d7 1: \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u3001\u307b\u307c\u540c\u3058\u30b5\u30a4\u30ba\u306e<em>k<\/em>\u500b\u306e\u30b0\u30eb\u30fc\u30d7\u3001\u3064\u307e\u308a\u300c\u5206\u5272\u300d\u306b\u30e9\u30f3\u30c0\u30e0\u306b\u5206\u5272\u3057\u307e\u3059\u3002<\/strong><\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11712 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kfold1.png\" alt=\"\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092 k \u500b\u306e\u30d5\u30a9\u30fc\u30eb\u30c9\u306b\u5206\u5272\u3059\u308b\" width=\"530\" height=\"133\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\"><strong>\u30b9\u30c6\u30c3\u30d7 2: \u4fdd\u6301\u30bb\u30c3\u30c8\u3068\u3057\u3066\u30d5\u30a9\u30fc\u30eb\u30c9\u306e 1 \u3064\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u6b8b\u308a\u306e k-1 \u500b\u306e\u6298\u308a\u76ee\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3057\u307e\u3059\u3002\u5f35\u529b\u304c\u304b\u304b\u3063\u305f\u5c64\u306e\u89b3\u5bdf\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066 MSE \u30c6\u30b9\u30c8\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/strong><\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11713 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kfold2.png\" alt=\"k\u5206\u5272\u4ea4\u5dee\u691c\u8a3c\" width=\"550\" height=\"174\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\"><strong>\u30b9\u30c6\u30c3\u30d7 3: \u6bce\u56de\u7570\u306a\u308b\u30bb\u30c3\u30c8\u3092\u9664\u5916\u30bb\u30c3\u30c8\u3068\u3057\u3066\u4f7f\u7528\u3057\u3066\u3001\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3092<em>k<\/em>\u56de\u7e70\u308a\u8fd4\u3057\u307e\u3059\u3002<\/strong><\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11714 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kfold3.png\" alt=\"k\u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u306e\u4f8b\" width=\"618\" height=\"234\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\"><strong>\u30b9\u30c6\u30c3\u30d7 4: \u30c6\u30b9\u30c8\u306e\u5168\u4f53\u7684\u306a MSE \u3092\u3001\u30c6\u30b9\u30c8\u306e<em>k<\/em>\u500b\u306e MSE \u306e\u5e73\u5747\u3068\u3057\u3066\u8a08\u7b97\u3057\u307e\u3059\u3002<\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u30c6\u30b9\u30c8 MSE = (1\/k)*\u03a3MSE <sub>i<\/sub><\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\">\u91d1\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>k:<\/strong>\u6298\u308a\u6570<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>MSE <sub>i<\/sub><\/strong> : <sup>i<\/sup>\u56de\u76ee\u306e\u53cd\u5fa9\u3067 MSE \u3092\u30c6\u30b9\u30c8\u3057\u307e\u3059<\/span><\/li>\n<\/ul>\n<h3><span style=\"color: #000000;\"><strong>K\u306e\u9078\u3073\u65b9<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4e00\u822c\u306b\u3001k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u3067\u4f7f\u7528\u3059\u308b\u5206\u5272\u6570\u304c\u591a\u3044\u307b\u3069\u3001MSE \u30c6\u30b9\u30c8\u306e\u30d0\u30a4\u30a2\u30b9\u306f\u4f4e\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u5206\u6563\u306f\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u9006\u306b\u3001\u4f7f\u7528\u3059\u308b\u6298\u308a\u76ee\u306e\u6570\u304c\u5c11\u306a\u3044\u307b\u3069\u3001\u30d0\u30a4\u30a2\u30b9\u306f\u9ad8\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u5206\u6563\u306f\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u6a5f\u68b0\u5b66\u7fd2\u306b\u304a\u3051\u308b<a href=\"https:\/\/statorials.org\/ja\/\u30cf\u3099\u30a4\u30a2\u30b9\u5206\u6563\u306e\u59a5\u5354\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u30d0\u30a4\u30a2\u30b9\u3068\u5206\u6563\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u306e<\/a>\u5178\u578b\u7684\u306a\u4f8b\u3067\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5b9f\u969b\u306b\u306f\u3001\u901a\u5e38\u306f 5 \uff5e 10 \u5c64\u306e\u5c64\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u9078\u629e\u3057\u307e\u3059\u3002 <a href=\"https:\/\/www.ime.unicamp.br\/~dias\/Intoduction%20to%20Statistical%20Learning.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><em>\u300e\u7d71\u8a08\u5b66\u7fd2\u306e\u6982\u8981\u300f<\/em>\u3067\u8aac\u660e\u3057\u305f\u3088\u3046\u306b\u3001<\/a>\u3053\u306e\u6298\u308a\u6570\u306f\u30d0\u30a4\u30a2\u30b9\u3068\u5206\u6563\u306e\u9593\u306e\u6700\u9069\u306a\u30d0\u30e9\u30f3\u30b9\u3092\u63d0\u4f9b\u3057\u3001\u30c6\u30b9\u30c8\u306e MSE \u306e\u4fe1\u983c\u3067\u304d\u308b\u63a8\u5b9a\u5024\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<blockquote>\n<p><span style=\"color: #000000;\">\u8981\u7d04\u3059\u308b\u3068\u3001k \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u306b\u304a\u3051\u308b k \u306e\u9078\u629e\u306b\u95a2\u9023\u3059\u308b\u30d0\u30a4\u30a2\u30b9\u5206\u6563\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u901a\u5e38\u3001\u3053\u308c\u3089\u306e\u8003\u616e\u4e8b\u9805\u3092\u8003\u616e\u3059\u308b\u3068\u3001k = 5 \u307e\u305f\u306f k = 10 \u3092\u4f7f\u7528\u3057\u3066 k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u3053\u308c\u3089\u306e\u5024\u306b\u3088\u308a\u3001\u904e\u5ea6\u306b\u9ad8\u3044\u30d0\u30a4\u30a2\u30b9\u3084\u975e\u5e38\u306b\u9ad8\u3044\u5206\u6563\u304c\u767a\u751f\u3057\u306a\u3044\u30c6\u30b9\u30c8\u8aa4\u308a\u7387\u63a8\u5b9a\u5024\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u304c\u7d4c\u9a13\u7684\u306b\u793a\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3067\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\">&#8211; \u30da\u30fc\u30b8 184\u3001<em>\u7d71\u8a08\u5b66\u7fd2\u306e\u6982\u8981<\/em><\/span><\/p>\n<\/blockquote>\n<h3><span style=\"color: #000000;\"><strong>K-Fold \u76f8\u4e92\u691c\u8a3c\u306e\u5229\u70b9<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u5358\u4e00\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0 \u30bb\u30c3\u30c8\u3068\u5358\u4e00\u306e\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u306b\u5206\u5272\u3059\u308b\u3068\u3001\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u5185\u306e\u89b3\u6e2c\u5024\u306b\u57fa\u3065\u3044\u3066\u8a08\u7b97\u3055\u308c\u305f\u30c6\u30b9\u30c8 MSE \u306f\u3001\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0 \u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u3067\u4f7f\u7528\u3055\u308c\u308b\u89b3\u6e2c\u5024\u306b\u5fdc\u3058\u3066\u5927\u304d\u304f\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\">k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0 \u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u306e\u3044\u304f\u3064\u304b\u306e\u7570\u306a\u308b\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066 MSE \u30c6\u30b9\u30c8\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c6\u30b9\u30c8\u306e MSE \u306e\u4e0d\u504f\u63a8\u5b9a\u5024\u3092\u53d6\u5f97\u3067\u304d\u308b\u53ef\u80fd\u6027\u304c\u5927\u5e45\u306b\u9ad8\u307e\u308a\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\">K \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u306f\u3001\u30e2\u30c7\u30eb\u3092<em>n<\/em>\u56de\u3067\u306f\u306a\u304f<em>k<\/em>\u56de\u9069\u5408\u3055\u305b\u308b\u3060\u3051\u3067\u3088\u3044\u305f\u3081<a href=\"https:\/\/statorials.org\/ja\/\u5358\u4e00\u306e\u76f8\u4e92\u691c\u8a3c\u3092\u6b8b\u3059\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u3001Leave-One-Out \u76f8\u4e92\u691c\u8a3c (LOOCV)<\/a>\u3088\u308a\u3082\u8a08\u7b97\u4e0a\u306e\u5229\u70b9\u3082\u5f97\u3089\u308c\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u30d5\u30a3\u30c3\u30c6\u30a3\u30f3\u30b0\u306b\u9577\u6642\u9593\u304b\u304b\u308b\u30e2\u30c7\u30eb\u306e\u5834\u5408\u3001k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u306f LOOCV \u3088\u308a\u3082\u306f\u308b\u304b\u306b\u901f\u304f\u30c6\u30b9\u30c8 MSE \u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002\u591a\u304f\u306e\u5834\u5408\u3001\u5341\u5206\u306a\u6570\u306e\u5206\u5272\u3092\u4f7f\u7528\u3059\u308c\u3070\u3001\u5404\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u8a08\u7b97\u3055\u308c\u305f\u30c6\u30b9\u30c8 MSE \u306f\u975e\u5e38\u306b\u4f3c\u305f\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>K-Fold \u76f8\u4e92\u691c\u8a3c\u62e1\u5f35\u6a5f\u80fd<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u3044\u304f\u3064\u304b\u306e\u62e1\u5f35\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u306e\u7e70\u308a\u8fd4\u3057:<\/strong>\u3053\u3053\u3067\u306f\u3001k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u304c\u5358\u7d14\u306b<em>n<\/em>\u56de\u7e70\u308a\u8fd4\u3055\u308c\u307e\u3059\u3002\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0 \u30bb\u30c3\u30c8\u3068\u30c6\u30b9\u30c8 \u30bb\u30c3\u30c8\u304c\u6df7\u5408\u3055\u308c\u308b\u305f\u3073\u306b\u3001\u30c6\u30b9\u30c8 MSE \u63a8\u5b9a\u5024\u306e\u504f\u308a\u306f\u3055\u3089\u306b\u6e1b\u5c11\u3057\u307e\u3059\u304c\u3001\u901a\u5e38\u306e k \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u3088\u308a\u3082\u5b8c\u4e86\u307e\u3067\u306b\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Leave-One-Out \u76f8\u4e92\u691c\u8a3c:<\/strong>\u3053\u308c\u306f\u3001 <em>k<\/em> = <em>n<\/em>\u3067\u3042\u308b k \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u306e\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u3067\u3059\u3002\u3053\u306e\u65b9\u6cd5\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/statorials.org\/ja\/\u5358\u4e00\u306e\u76f8\u4e92\u691c\u8a3c\u3092\u6b8b\u3059\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u3001\u3053\u3061\u3089\u3092<\/a>\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u5c64\u5225 k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c:<\/strong>\u3053\u308c\u306f\u3001\u5404\u5206\u5272\u304c\u5168\u4f53\u3092\u4ee3\u8868\u3059\u308b\u3088\u3046\u306b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304c\u518d\u914d\u7f6e\u3055\u308c\u308b k \u5206\u5272\u4ea4\u5dee\u691c\u8a3c\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3059\u3002 <a href=\"https:\/\/www.researchgate.net\/publication\/2352264_A_Study_of_Cross-Validation_and_Bootstrap_for_Accuracy_Estimation_and_Model_Selection\" target=\"_blank\" rel=\"noopener noreferrer\">Kohavi<\/a>\u306b\u3088\u3063\u3066\u6307\u6458\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u3001\u3053\u306e\u65b9\u6cd5\u306f\u3001\u901a\u5e38\u306e k \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u3068\u6bd4\u8f03\u3057\u3066\u3001\u30d0\u30a4\u30a2\u30b9\u3068\u5206\u6563\u306e\u9593\u306e\u3088\u308a\u826f\u3044\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u3092\u63d0\u4f9b\u3059\u308b\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u30cd\u30b9\u30c8\u3055\u308c\u305f\u76f8\u4e92\u691c\u8a3c:<\/strong>\u3053\u308c\u306f\u3001\u5404\u76f8\u4e92\u691c\u8a3c\u5206\u5272\u3067 k \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u304c\u5b9f\u884c\u3055\u308c\u308b\u5834\u6240\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30e2\u30c7\u30eb\u306e\u8a55\u4fa1\u4e2d\u306b\u30cf\u30a4\u30d1\u30fc\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u8abf\u6574\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u5bfe\u3059\u308b\u30e2\u30c7\u30eb\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8a55\u4fa1\u3059\u308b\u306b\u306f\u3001\u30e2\u30c7\u30eb\u306b\u3088\u3063\u3066\u884c\u308f\u308c\u305f\u4e88\u6e2c\u304c\u89b3\u5bdf\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3068\u3069\u306e\u7a0b\u5ea6\u4e00\u81f4\u3059\u308b\u304b\u3092\u6e2c\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u3053\u308c\u3092\u6e2c\u5b9a\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\u3055\u308c\u308b\u5e73\u5747\u4e8c\u4e57\u8aa4\u5dee ( [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-1174","post","type-post","status-publish","format-standard","hentry","category-16"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>K \u30d5\u30a9\u30fc\u30eb\u30c9\u76f8\u4e92\u691c\u8a3c\u306e\u7c21\u5358\u306a\u30ac\u30a4\u30c9 - \u7d71\u8a08<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u6a5f\u68b0\u5b66\u7fd2\u3067\u30e2\u30c7\u30eb\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8a55\u4fa1\u3059\u308b\u305f\u3081\u306b\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u65b9\u6cd5\u3067\u3042\u308b k \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u306e\u6982\u8981\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/ja\/k-\u5206\u5272\u4ea4\u5dee\u691c\u8a3c\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"K \u30d5\u30a9\u30fc\u30eb\u30c9\u76f8\u4e92\u691c\u8a3c\u306e\u7c21\u5358\u306a\u30ac\u30a4\u30c9 - \u7d71\u8a08\" \/>\n<meta property=\"og:description\" content=\"\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u6a5f\u68b0\u5b66\u7fd2\u3067\u30e2\u30c7\u30eb\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8a55\u4fa1\u3059\u308b\u305f\u3081\u306b\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u65b9\u6cd5\u3067\u3042\u308b k \u5206\u5272\u76f8\u4e92\u691c\u8a3c\u306e\u6982\u8981\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/ja\/k-\u5206\u5272\u4ea4\u5dee\u691c\u8a3c\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T09:50:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kfold1.png\" \/>\n<meta name=\"author\" content=\"\u30d9\u30f3\u30b8\u30e3\u30df\u30f3\u30fb\u30a2\u30f3\u30c0\u30fc\u30bd\u30f3\u535a\u58eb\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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