{"id":3889,"date":"2023-10-31T11:43:30","date_gmt":"2023-10-31T02:43:30","guid":{"rendered":"https:\/\/blog.since2020.jp\/?p=3889"},"modified":"2023-10-31T13:37:14","modified_gmt":"2023-10-31T04:37:14","slug":"decisiontree-2","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/decisiontree-2\/","title":{"rendered":"\u6c7a\u5b9a\u6728\u5206\u6790\u3068Python\u3067\u306e\u5b9f\u88c5\u4f8b\u306b\u3064\u3044\u3066\u89e3\u8aac\uff01"},"content":{"rendered":"\n<p>\u6c7a\u5b9a\u6728\u5206\u6790\u306e\u7279\u5fb4\u3068\u3001\u305d\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\uff01\r\n<\/p>\n\n\n<h2>\u6c7a\u5b9a\u6728\u3068\u306f\uff1f<\/h2>\n<p>\u6c7a\u5b9a\u6728\uff08Decision Tree\uff09\u3068\u306f\u3001\u30c7\u30fc\u30bf\u89e3\u6790\u3084\u6a5f\u68b0\u5b66\u7fd2\u306b\u304a\u3044\u3066\u5e83\u304f\u4f7f\u7528\u3055\u308c\u308b\u3001\u6728\u69cb\u9020\u3092\u6301\u3064\u30e2\u30c7\u30eb\u3067\u3059\u3002\u56de\u5e30\u3068\u5206\u985e\u306e\u53cc\u65b9\u306b\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\r\n<p>\u6c7a\u5b9a\u6728\u306f\u3001\u6839\u30ce\u30fc\u30c9\u304b\u3089\u59cb\u307e\u308a\u3001\u5206\u5c90\u30ce\u30fc\u30c9\u3092\u7d4c\u3066\u8449\u30ce\u30fc\u30c9\u306b\u81f3\u308a\u307e\u3059\u3002\u6839\u30ce\u30fc\u30c9\u306f\u6700\u3082\u91cd\u8981\u306a\u7279\u5fb4\u3092\u8868\u3057\u3001\u5206\u5c90\u30ce\u30fc\u30c9\u306f\u30c7\u30fc\u30bf\u306e\u5206\u5272\u3092\u793a\u3057\u3001\u8449\u30ce\u30fc\u30c9\u306f\u6700\u7d42\u7684\u306a\u4e88\u6e2c\u5024\uff08\u5206\u985e\u554f\u984c\u3067\u306f\u4e88\u6e2c\u30af\u30e9\u30b9\uff09\u3092\u793a\u3057\u307e\u3059\u3002\u5206\u5272\u306f\u3001\u5165\u529b\u30c7\u30fc\u30bf\u306e\u7279\u5fb4\u91cf\u306b\u57fa\u3065\u3044\u305f\uff12\u629e\u306e\u8cea\u554f\u306b\u3088\u3063\u3066\u884c\u308f\u308c\u307e\u3059\u3002\uff08\u4f8b\uff1a\u8eab\u9577\u304cXcm\u3088\u308a\u3082\u5927\u304d\u3044\u304b\u5426\u304b\uff09<\/p>\r\n<p>\u4ee5\u4e0b\u3001iris\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u5206\u985e\u3092\u884c\u3046\u30b3\u30fc\u30c9\u3068\u305d\u306e\u51fa\u529b\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\r\n<p>\u6c7a\u5b9a\u6728\u3067\u306e\u5206\u6790\u306f\u3001<strong>tree.DecisionTreeClassifier()<\/strong>\u3000\u3067\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: 38077921-f8de-4b1e-847e-f59497e8d588 --><\/p>\r\n<div class=\"hcb_wrap\">\r\n<pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>from sklearn.datasets import load_iris\r\nfrom sklearn import tree\r\nimport matplotlib.pyplot as plt\r\n\r\niris = load_iris()\r\nX, y = iris.data, iris.target\r\n\r\nclf = tree.DecisionTreeClassifier()\r\nclf = clf.fit(X, y)\r\ntree.plot_tree(clf)<\/code><\/pre>\r\n<\/div>\r\n<p>&nbsp;<\/p>\n\n<h2>\u6c7a\u5b9a\u6728\u306e\u30e1\u30ea\u30c3\u30c8<\/h2>\n<ul>\r\n\t<li><strong>\u76f4\u611f\u7684\u3067\u7406\u89e3\u3057\u3084\u3059\u3044<\/strong><\/li>\r\n<\/ul>\r\n<p>\u6728\u3092\u51fa\u529b\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u306e\u30d1\u30bf\u30fc\u30f3\u3084\u610f\u601d\u6c7a\u5b9a\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u53ef\u8996\u5316\u3067\u304d\u307e\u3059\u3002\u30d6\u30e9\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u3068\u8a00\u308f\u308c\u308b\u30c7\u30a3\u30fc\u30d7\u30e9\u30fc\u30cb\u30f3\u30b0\u3092\u4f7f\u3063\u305f\u30e2\u30c7\u30eb\u306a\u3069\u3068\u6bd4\u8f03\u3057\u3066\u3001\u6c7a\u5b9a\u6728\u306f\u30e2\u30c7\u30eb\u306f<strong>\u30db\u30ef\u30a4\u30c8\u30dc\u30c3\u30af\u30b9<\/strong>\u306a\u30e2\u30c7\u30eb\u3068\u8a00\u308f\u308c\u307e\u3059\u3002<\/p>\r\n<ul>\r\n\t<li><strong>\u524d\u51e6\u7406\u304c\u3042\u307e\u308a\u5fc5\u8981\u306a\u3044<\/strong><\/li>\r\n<\/ul>\r\n<p>\u56de\u5e30\u5206\u6790\u306e\u591a\u304f\u306e\u30e2\u30c7\u30eb\u3067\u306f\u3001\u30c7\u30fc\u30bf\u304c\u6b63\u898f\u5206\u5e03\u306b\u5f93\u3046\u3053\u3068\u3092\u4eee\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5f97\u3089\u308c\u305f\u30c7\u30fc\u30bf\u304c\u6b63\u898f\u5206\u5e03\u306b\u5f93\u3046\u3088\u3046\u306b\u6a19\u6e96\u5316\u3084\u5bfe\u6570\u5909\u63db\u3068\u3044\u3063\u305f\u524d\u51e6\u7406\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9\u3001\u6c7a\u5b9a\u6728\u5206\u6790\u3067\u306f\u3001\u6b63\u898f\u5206\u5e03\u3092\u4eee\u5b9a\u3057\u3066\u304a\u3089\u305a\u3001Yes \/No\u3067\u5024\u3092\u5206\u985e\u3057\u3066\u3044\u304f\u305f\u3081\u3001\u524d\u8ff0\u306e\u3088\u3046\u306a\u524d\u51e6\u7406\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u6b20\u640d\u5024\u3067\u3042\u308b\u304b\u5426\u304b\u3092\u5206\u5c90\u306b\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3001\u6b20\u640d\u5024\u306e\u51e6\u7406\u3082\u5fc5\u8981\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\r\n<p><!-- notionvc: d9b7c46c-0e25-4402-8eda-a5e2dd36403d --><\/p>\n\n<h2>\u6c7a\u5b9a\u6728\u306e\u30c7\u30e1\u30ea\u30c3\u30c8<\/h2>\n<ul>\r\n\t<li><strong>\u904e\u5b66\u7fd2\u304c\u8d77\u3053\u308a\u3084\u3059\u3044<\/strong><\/li>\r\n<\/ul>\r\n<p>\u5206\u5c90\u306e\u6570\u3092\u5897\u3084\u3057\u3059\u304e\u308b\u3068\u3001\u5b66\u7fd2\u7528\u306e\u30c7\u30fc\u30bf\u306b\u9069\u5408\u3057\u3059\u304e\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u308c\u3092\u9632\u3050\u305f\u3081\u306b\u3001<strong>\u526a\u5b9a<\/strong>\uff08\u305b\u3093\u3066\u3044\uff09\u3068\u3044\u3046\u6728\u306e\u6df1\u3055\u3092\u5236\u9650\u3059\u308b\u64cd\u4f5c\u3092\u65bd\u3057\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: 8e2d4df2-cd8c-4818-b5ab-d95bac88b99d --><\/p>\n\n<h2>\u6c7a\u5b9a\u6728\u306e\u5fdc\u7528<\/h2>\n<p>\u6c7a\u5b9a\u6728\u306e\u5fdc\u7528\u3068\u3057\u3066\u3001\u6a5f\u68b0\u5b66\u7fd2\u306e\u30b3\u30f3\u30da\u30c6\u30a3\u30b7\u30e7\u30f3\u306a\u3069\u3067\u3088\u304f\u7528\u3044\u3089\u308c\u308b<span data-token-index=\"1\" class=\"notion-enable-hover\">\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8<\/span>\u304c\u3042\u308a\u307e\u3059\u3002\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306f\u6c7a\u5b9a\u6728\u3092\u305f\u304f\u3055\u3093\u7528\u610f\u3057\u3066\u305d\u308c\u305e\u308c\u4e88\u6e2c\u3092\u884c\u3044\u3001\u591a\u6570\u6c7a\u306e\u3088\u3046\u306a\u5f62\u3067\u4e88\u6e2c\u306e\u7d50\u679c\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002\u6c7a\u5b9a\u300c\u6728\u300d\u3092\u305f\u304f\u3055\u3093\u7528\u3044\u308b\u306e\u3067\u3001\u30e9\u30f3\u30c0\u30e0\u300c\u30d5\u30a9\u30ec\u30b9\u30c8\u300d\u3068\u8a00\u3046\u540d\u79f0\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<!-- notionvc: fd18a066-2e50-47b8-8206-44aa22f3681d --><\/p>","protected":false},"excerpt":{"rendered":"<p>\u6c7a\u5b9a\u6728\u5206\u6790\u306e\u7279\u5fb4\u3068\u3001\u305d\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\uff01 \u6c7a\u5b9a\u6728\u3068\u306f\uff1f \u6c7a\u5b9a\u6728\uff08Decision Tree\uff09\u3068\u306f\u3001\u30c7\u30fc\u30bf\u89e3\u6790\u3084\u6a5f\u68b0\u5b66\u7fd2\u306b\u304a\u3044\u3066\u5e83\u304f\u4f7f\u7528\u3055\u308c\u308b\u3001\u6728\u69cb\u9020\u3092\u6301\u3064\u30e2\u30c7\u30eb\u3067\u3059\u3002\u56de\u5e30\u3068\u5206\u985e\u306e\u53cc\u65b9\u306b\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":3123,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","swell_btn_cv_data":"","footnotes":"","_wp_rev_ctl_limit":""},"categories":[1246],"tags":[],"class_list":["post-3889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-infrastructure"],"_links":{"self":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/3889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/comments?post=3889"}],"version-history":[{"count":1,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/3889\/revisions"}],"predecessor-version":[{"id":3902,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/3889\/revisions\/3902"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media\/3123"}],"wp:attachment":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media?parent=3889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/categories?post=3889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/tags?post=3889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}