{"id":3500,"date":"2023-07-17T03:38:00","date_gmt":"2023-07-17T03:38:00","guid":{"rendered":"https:\/\/statorials.org\/ja\/r%e3%81%a6%e3%82%99%e6%b1%ba%e5%ae%9a%e6%9c%a8%e3%82%92%e6%8f%8f%e3%81%8f\/"},"modified":"2023-07-17T03:38:00","modified_gmt":"2023-07-17T03:38:00","slug":"r%e3%81%a6%e3%82%99%e6%b1%ba%e5%ae%9a%e6%9c%a8%e3%82%92%e6%8f%8f%e3%81%8f","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/r%e3%81%a6%e3%82%99%e6%b1%ba%e5%ae%9a%e6%9c%a8%e3%82%92%e6%8f%8f%e3%81%8f\/","title":{"rendered":"R \u3067\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3092\u63cf\u753b\u3059\u308b\u65b9\u6cd5 (\u4f8b\u4ed8\u304d)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><span style=\"color: #000000;\"><a href=\"https:\/\/statorials.org\/ja\/-10\/\" target=\"_blank\" rel=\"noopener\">\u6a5f\u68b0\u5b66\u7fd2<\/a>\u306b\u304a\u3044\u3066\u3001<strong>\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u306f<\/strong>\u3001\u4e00\u9023\u306e\u4e88\u6e2c\u5b50\u5909\u6570\u3092\u4f7f\u7528\u3057\u3066\u5fdc\u7b54\u5909\u6570\u306e\u5024\u3092\u4e88\u6e2c\u3059\u308b\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3092\u4f5c\u6210\u3059\u308b\u30e2\u30c7\u30eb\u306e\u4e00\u7a2e\u3067\u3059\u3002<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">R \u3067\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3092\u30d7\u30ed\u30c3\u30c8\u3059\u308b\u6700\u3082\u7c21\u5358\u306a\u65b9\u6cd5\u306f\u3001 <strong>rpart.plot<\/strong>\u30d1\u30c3\u30b1\u30fc\u30b8\u306e<strong>prp()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u4f8b\u306f\u3001\u3053\u306e\u95a2\u6570\u3092\u5b9f\u969b\u306b\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<h2><span style=\"color: #000000;\"><strong>\u4f8b: R \u3067\u6c7a\u5b9a\u6728\u3092\u63cf\u753b\u3059\u308b<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u3053\u306e\u4f8b\u3067\u306f\u3001 <strong>ISLR<\/strong>\u30d1\u30c3\u30b1\u30fc\u30b8\u306e<strong>Hitters<\/strong>\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001263 \u4eba\u306e\u30d7\u30ed\u91ce\u7403\u9078\u624b\u306b\u95a2\u3059\u308b\u3055\u307e\u3056\u307e\u306a\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u3053\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u30db\u30fc\u30e0\u30e9\u30f3\u3068\u51fa\u5834\u5e74\u6570\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u9078\u624b\u306e\u5e74\u4ff8\u3092\u4e88\u6e2c\u3059\u308b\u56de\u5e30\u30c4\u30ea\u30fc\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001\u3053\u306e\u56de\u5e30\u30c4\u30ea\u30fc\u3092\u5f53\u3066\u306f\u3081\u308b\u65b9\u6cd5\u3068\u3001 <strong>prp()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30c4\u30ea\u30fc\u3092\u63cf\u753b\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (ISLR)\n<span style=\"color: #008000;\">library<\/span> (rpart)\n<span style=\"color: #008000;\">library<\/span> (rpart.plot)\n\n<span style=\"color: #993300;\"><span style=\"color: #008080;\">#build the initial decision tree\n<\/span><span style=\"color: #000000;\">tree &lt;- rpart(Salary ~ Years + HmRun, data=Hitters, control=rpart. <span style=\"color: #3366ff;\">control<\/span> (cp= <span style=\"color: #008000;\">.0001<\/span> ))\n<\/span><\/span><\/strong><span style=\"color: #000000;\">\n<\/span><strong><span style=\"color: #993300;\"><span style=\"color: #008080;\">#identify best cp value to use\n<span style=\"color: #000000;\">best &lt;- tree$cptable[which. <span style=\"color: #3366ff;\">min<\/span> (tree$cptable[,\" <span style=\"color: #ff0000;\">xerror<\/span> \"]),\" <span style=\"color: #ff0000;\">CP<\/span> \"]\n\n<span style=\"color: #008080;\">#produce a pruned tree based on the best cp value\n<\/span>pruned_tree &lt;- <span style=\"color: #3366ff;\">prune<\/span> (tree, cp=best)\n\n<span style=\"color: #008080;\">#plot the pruned tree\n<\/span>prp(pruned_tree)\n<\/span><\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-29168 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/decision1.jpg\" alt=\"\" width=\"367\" height=\"344\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>prp<\/strong> () \u95a2\u6570\u306e<strong>faclen<\/strong> \u3001 <strong>extra<\/strong> \u3001 <strong>roundint<\/strong>\u304a\u3088\u3073<strong>Digits<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u306e\u5916\u89b3\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #993300;\"><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#plot decision tree using custom arguments<\/span>\nprp(pruned_tree,\n    faclen= <span style=\"color: #008000;\">0<\/span> , <span style=\"color: #008080;\">#use full names for factor labels<\/span>\n    extra= <span style=\"color: #008000;\">1<\/span> , <span style=\"color: #008080;\">#display number of observations for each terminal node<\/span>\n    roundint= <span style=\"color: #008000;\">F<\/span> , <span style=\"color: #008080;\">#don't round to integers in output<\/span>\n    digits= <span style=\"color: #008000;\">5<\/span> ) <span style=\"color: #008080;\">#display 5 decimal places in output<\/span><\/span><\/span><\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-29169\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/decision2.jpg\" alt=\"R\u3067\u6c7a\u5b9a\u6728\u3092\u63cf\u304f\" width=\"431\" height=\"323\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\">\u30c4\u30ea\u30fc\u306b\u306f 6 \u3064\u306e\u7d42\u7aef\u30ce\u30fc\u30c9\u304c\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5404\u30bf\u30fc\u30df\u30ca\u30eb \u30ce\u30fc\u30c9\u306b\u306f\u3001\u305d\u306e\u30ce\u30fc\u30c9\u5185\u306e\u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u4e88\u6e2c\u5e74\u4ff8\u3068\u3001\u305d\u306e\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u5c5e\u3059\u308b\u5143\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304b\u3089\u306e\u89b3\u6e2c\u5024\u306e\u6570\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u305f\u3068\u3048\u3070\u3001\u5143\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u306f\u3001\u7d4c\u9a13\u304c 4.5 \u5e74\u672a\u6e80\u306e\u30d7\u30ec\u30fc\u30e4\u30fc\u304c 90 \u4eba\u3044\u3066\u3001\u5e73\u5747\u7d66\u4e0e\u304c<strong>$225.83,000<\/strong>\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12095 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/arbre4.png\" alt=\"R \u3067\u306e\u56de\u5e30\u6728\u306e\u89e3\u91c8\" width=\"403\" height=\"302\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\">\u307e\u305f\u3001\u30c4\u30ea\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3001\u7d4c\u9a13\u5e74\u6570\u3068\u5e73\u5747\u30db\u30fc\u30e0\u30e9\u30f3\u306b\u57fa\u3065\u3044\u3066\u7279\u5b9a\u306e\u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u5e74\u4ff8\u3092\u4e88\u6e2c\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u305f\u3068\u3048\u3070\u30017 \u5e74\u306e\u7d4c\u9a13\u3068\u5e73\u5747 4 \u672c\u5841\u6253\u306e\u9078\u624b\u306e\u671f\u5f85\u5e74\u4ff8\u306f<strong>502.81,000 \u30c9\u30eb<\/strong>\u3067\u3059\u3002<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12096 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/arbre5.png\" alt=\"R \u306e\u56de\u5e30\u6728\u306e\u4f8b\" width=\"422\" height=\"306\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\">\u3053\u308c\u306f\u3001\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5229\u70b9\u306e 1 \u3064\u3067\u3059\u3002\u7d50\u679c\u3092\u7c21\u5358\u306b\u8996\u899a\u5316\u3057\u3066\u89e3\u91c8\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/span><\/p>\n<h2><span style=\"color: #000000;\"><strong><span style=\"color: #000000;\">\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/span><\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u306b\u95a2\u3059\u308b\u8ffd\u52a0\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/span><\/p>\n<p><a href=\"https:\/\/statorials.org\/ja\/\u5206\u985e\u6728\u3068\u56de\u5e30\u6728\/\" target=\"_blank\" rel=\"noopener\">\u5206\u985e\u30c4\u30ea\u30fc\u3068\u56de\u5e30\u30c4\u30ea\u30fc\u306e\u6982\u8981<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/\u30c6\u3099\u30b7\u30b7\u3099\u30e7\u30f3-\u30c4\u30ea\u30fc\u3068\u30e9\u30f3\u30bf\u3099\u30e0-\u30d5\u30a9\u30ec\u30b9\u30c8\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3068\u30e9\u30f3\u30c0\u30e0 \u30d5\u30a9\u30ec\u30b9\u30c8: \u9055\u3044\u306f\u4f55\u3067\u3059\u304b?<\/a><br \/> <a href=\"https:\/\/statorials.org\/ja\/r-\u306e\u5206\u985e\u6728\u3068\u56de\u5e30\u6728\/\" target=\"_blank\" rel=\"noopener\">R \u3067\u5206\u985e\u6728\u3068\u56de\u5e30\u6728\u3092\u5f53\u3066\u306f\u3081\u308b\u65b9\u6cd5<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6a5f\u68b0\u5b66\u7fd2\u306b\u304a\u3044\u3066\u3001\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u306f\u3001\u4e00\u9023\u306e\u4e88\u6e2c\u5b50\u5909\u6570\u3092\u4f7f\u7528\u3057\u3066\u5fdc\u7b54\u5909\u6570\u306e\u5024\u3092\u4e88\u6e2c\u3059\u308b\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3092\u4f5c\u6210\u3059\u308b\u30e2\u30c7\u30eb\u306e\u4e00\u7a2e\u3067\u3059\u3002 R \u3067\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3092\u30d7\u30ed\u30c3\u30c8\u3059\u308b\u6700\u3082\u7c21\u5358\u306a\u65b9\u6cd5\u306f\u3001 rpart.plot\u30d1\u30c3\u30b1 [&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-3500","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>R \u3067\u30c7\u30b7\u30b8\u30e7\u30f3 \u30c4\u30ea\u30fc\u3092\u63cf\u753b\u3059\u308b\u65b9\u6cd5 (\u4f8b\u4ed8\u304d) - Statorials<\/title>\n<meta name=\"description\" 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