{"id":470,"date":"2018-09-03T08:07:13","date_gmt":"2018-09-02T23:07:13","guid":{"rendered":"https:\/\/best-biostatistics.com\/toukei-er\/entry\/decision-tree-learning-by-partykit-in-r\/"},"modified":"2024-10-12T23:08:14","modified_gmt":"2024-10-12T14:08:14","slug":"decision-tree-learning-by-partykit-in-r","status":"publish","type":"post","link":"https:\/\/best-biostatistics.com\/toukei-er\/entry\/decision-tree-learning-by-partykit-in-r\/","title":{"rendered":"R partykit \u3067\u6c7a\u5b9a\u6728\u5206\u6790\u3092\u5b9f\u884c\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"\n

\u6c7a\u5b9a\u6728\u5206\u6790\u3092R\u3067\u884c\u3046\u65b9\u6cd5\u3092\u7d39\u4ecb\u3002<\/p>\n\n\n\n

\u96e3\u3057\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d44\u3081\u306a\u304f\u3066\u3082\u3059\u3050\u306b\u4f7f\u3048\u308b\u3002<\/p>\n\n\n\n\n\n\n\n

\u6c7a\u5b9a\u6728\u5206\u6790\u306eR\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u6e96\u5099<\/h2>\n\n\n\n

\u6c7a\u5b9a\u6728\u5206\u6790\u306e\u30d1\u30c3\u30b1\u30fc\u30b8rpart\u3068\u304d\u308c\u3044\u306a\u6c7a\u5b9a\u6728\u306e\u63cf\u753b\u30d1\u30c3\u30b1\u30fc\u30b8partykit\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3002<\/p>\n\n\n\n

\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u521d\u3081\u306e\u4e00\u56de\u3060\u3051\u3067OK\u3002<\/p>\n\n\n\n

install.packages(\"rpart\")\ninstall.packages(\"partykit\")\n<\/code><\/pre>\n\n\n\n
library()\u3067\u547c\u3073\u51fa\u3057\u3066\u304a\u304f\u3002<\/p>\n\n\n\n
library(rpart)\nlibrary(partykit)\n<\/code><\/pre>\n\n\n\n
\u6c7a\u5b9a\u6728\u5206\u6790\u3092\uff32\u3067\u884c\u3046\u5b9f\u4f8b<\/h2>\n\n\n\n
rpart\u30d1\u30c3\u30b1\u30fc\u30b8\u306ekyphosis\uff08\u810a\u67f1\u5f8c\u5f2f\u75c7\uff09\u30c7\u30fc\u30bf\u3092\u4f7f\u3046\u3002<\/p>\n\n\n\n
\u810a\u67f1\u5f8c\u5f2f\u75c7Kyphosis\u3092\u304d\u305f\u3059\u3053\u3068\u3092\u4e88\u6e2c\u3057\u3088\u3046\u3068\u3059\u308b\u5206\u6790\u3067\u3001\u6708\u9f62\u306eAge\u3068\u3001\u3044\u304f\u3064\u306e\u690e\u4f53\u304c\u95a2\u4fc2\u3057\u3066\u3044\u308b\u304b\u306eNumber\u3068\u3001\u624b\u8853\u3092\u3057\u305f\u3082\u3063\u3068\u3082\u4e0a\u306e\u30ec\u30d9\u30eb\u306e\u690e\u4f53\u306e\u756a\u53f7Start\u3067\u4e88\u6e2c\u3059\u308b\u3002<\/p>\n\n\n\n
fit <- rpart(Kyphosis ~ Age + Number + Start, data = kyphosis)<\/code><\/pre>\n\n\n\n
plot(as.party())\u3067\u304d\u308c\u3044\u306a\u6c7a\u5b9a\u6728\u3092\u63cf\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n\n\n
plot(as.party(fit))<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n\n\n\n\n
\u4f5c\u6210\u3055\u308c\u305f\u6c7a\u5b9a\u6728\u3092\u8a18\u8ff0\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n\n\n\n
\u6700\u521d\u306e\u5206\u5c90\u306f\u3001Start\uff08\u624b\u8853\u3092\u3057\u305f\u3082\u3063\u3068\u3082\u4e0a\u306e\u30ec\u30d9\u30eb\u306e\u690e\u4f53\u306e\u756a\u53f7\uff09\u304c8.5\u4ee5\u4e0a\u304b\u3069\u3046\u304b\u3002<\/p>\n\n\n\n
Start\u304c8.5\u672a\u6e80\u3060\u3063\u305f\u3089\u3001Present\uff08\u810a\u67f1\u5f8c\u5f2f\u75c7\u3042\u308a\uff09\u306e\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3002<\/p>\n\n\n\n
Start\u304c8.5\u4ee5\u4e0a\u3067\u3001\u304b\u3064\u300114.5\u4ee5\u4e0a\u3067\u3042\u308c\u3070\u3001\u5168\u54e1\u304cAbsent\uff08\u810a\u67f1\u5f8c\u5f2f\u75c7\u306a\u3057\uff09\u3002<\/p>\n\n\n\n
\u3055\u3089\u306b\u3001Start\u304c14.5\u672a\u6e80\u3067\u3082\u6708\u9f6255\u304b\u6708\u672a\u6e80\u3060\u3068\u5168\u54e1Absent\u3002<\/p>\n\n\n\n
\u6708\u9f62\u304c55\u304b\u6708\u4ee5\u4e0a\u3067\u3001\u6708\u9f62111\u304b\u6708\u4ee5\u4e0a\u3082\u307b\u3068\u3093\u3069Absent\u3002<\/p>\n\n\n\n
\u6708\u9f62\u304c55\u304b\u6708\u4ee5\u4e0a\u3067\u3001111\u304b\u6708\u672a\u6e80\u3067\u3042\u308c\u3070\u3001Present\u304c\u534a\u5206\u3092\u8d85\u3048\u3066\u3044\u308b\u3002<\/p>\n\n\n\n
\uff1e\uff1e\u3082\u3046\u7d71\u8a08\u3067\u60a9\u3080\u306e\u306f\u7d42\u308f\u308a\u306b\u3057\u307e\u305b\u3093\u304b\uff1f\u00a0<\/a><\/strong><\/span><\/p>\r\n\"\"<\/a>\r\n
\u21911\u4e07\u4eba\u4ee5\u4e0a\u306e\u533b\u7642\u5f93\u4e8b\u8005\u304c\u8cfc\u8aad\u4e2d<\/span><\/strong><\/span><\/p><\/div>
\u6c7a\u5b9a\u6728\u5206\u6790\u3092\uff32\u3067\u884c\u3046\u5834\u5408\u306eComplex parameter<\/h2>\n\n\n\n
printcp()\u3067\u5b9f\u6e2c\u3068\u6c7a\u5b9a\u6728\u306e\u4e88\u6e2c\u306e\u305a\u308c\uff08\u30a8\u30e9\u30fc\uff09\u304c\u3069\u3053\u3067\u53ce\u675f\u3059\u308b\u304b\u3092\u898b\u3066\u3044\u308b\u3002<\/p>\n\n\n\n
printcp()\u306f\u3001\u30a8\u30e9\u30fc\u304c\u53ce\u675f\u3057\u3066\u3044\u308b\u5206\u5c90\u3092\u898b\u51fa\u3059\u3002<\/p>\n\n\n\n
\u30a8\u30e9\u30fc\u304c\u53ce\u675f\u3057\u305f\u5206\u5c90\u3092complex parameter (CP)\u3068\u3057\u3066\u63a1\u7528\u3059\u308b\u3002<\/p>\n\n\n\n
\u4eca\u56de\u306f\u3053\u306e\u5834\u5408\u30010.019608\u3067\u30a8\u30e9\u30fc\u304c\u53ce\u675f\u3057\u3066\u3044\u308b\u3068\u8aad\u3080\u3002<\/p>\n\n\n\n
\u30a8\u30e9\u30fc\u304c\u5c0f\u3055\u304f\u3001\u6c7a\u5b9a\u6728\u306e\u5927\u304d\u3055\u306f\u305d\u3053\u305d\u3053\u5927\u304d\u3044\u3053\u3068\u304cCP\u306e\u6761\u4ef6\u3002<\/p>\n\n\n\n
CP=0.0196808\u306e\u3068\u304d\u306b\u3001\u30a8\u30e9\u30fc(rel error)\u304c\u53ce\u675f\u3057\u3066\u3044\u308b\u611f\u3058\u304c\u898b\u3066\u53d6\u308c\u308b\u3002<\/p>\n\n\n\n
rel error\u304c\u5927\u304d\u304f\u6e1b\u5c11\u3057\u306a\u304f\u306a\u308b\u70b9\u3092\u6307\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n
> printcp(fit)\nClassification tree:\nrpart(formula = Kyphosis ~ Age + Number + Start, data = kyphosis)\nVariables actually used in tree construction:\n[1] Age   Start\nRoot node error: 17\/81 = 0.20988\nn= 81\nCP nsplit rel error xerror    xstd\n1 0.176471      0   1.00000 1.0000 0.21559\n2 0.019608      1   0.82353 1.0588 0.22010\n3 0.010000      4   0.76471 1.0588 0.22010\n<\/code><\/pre>\n\n\n\n
Complex parameter\u3092\u4f7f\u3063\u3066\u6c7a\u5b9a\u6728\u3092\u526a\u5b9a\u3059\u308b\u65b9\u6cd5<\/h2>\n\n\n\n
rpart\u95a2\u6570\u306e\u4e2d\u306b\u3001CP=0.019608\u3092\u4ee3\u5165\u3057\u3066\u3001\u526a\u5b9a\u3057\u305f\u6c7a\u5b9a\u6728\u3092\u4f5c\u6210\u3059\u308b\u3002<\/p>\n\n\n\n
partykit\u3067\u63cf\u3044\u3066\u307f\u308b\u3002<\/p>\n\n\n\n
fit1 <- rpart(Kyphosis ~ Age + Number + Start, data = kyphosis, cp=0.019608)\nplot(as.party(fit1))<\/code><\/pre>\n\n\n\n
\u6700\u521d\u306e\u5206\u5c90\u3001Start\u304c8.5\u4ee5\u4e0a\u304b\u3069\u3046\u304b\u3060\u3051\u3067\u3001\u304b\u306a\u308a\u5206\u3051\u3089\u308c\u308b\u306e\u304c\u898b\u3066\u53d6\u308c\u308b\u3002<\/p>\n\n\n\n
Complex parameter\u306b\u3088\u308b\u526a\u5b9a\u304c\u884c\u308f\u308c\u308b\u3068\u3053\u3093\u306a\u306b\u3056\u3063\u304f\u308a\u3057\u305f\u6c7a\u5b9a\u6728\u306b\u306a\u308b\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n\n\n\n\n
\u307e\u3068\u3081<\/h2>\n\n\n\n
\u7d71\u8a08\u30bd\u30d5\u30c8R\u306erprar\u30d1\u30c3\u30b1\u30fc\u30b8\u3068partykit\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u3046\u3068\u3001\u7c21\u5358\u306b\u6c7a\u5b9a\u6728\u5206\u6790\u3068\u304d\u308c\u3044\u306a\u6c7a\u5b9a\u6728\u3092\u63cf\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n\n\n
Complex parameter\u306b\u3088\u3063\u3066\u526a\u5b9a\u3092\u884c\u3063\u3066\u3001\u3088\u308a\u6c4e\u7528\u6027\u306e\u9ad8\u3044\u6c7a\u5b9a\u6728\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3082\u7c21\u5358\u306b\u3067\u304d\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6c7a\u5b9a\u6728\u5206\u6790\u3092R\u3067\u884c\u3046\u65b9\u6cd5\u3092\u7d39\u4ecb\u3002 \u96e3\u3057\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d44\u3081\u306a\u304f\u3066\u3082\u3059\u3050\u306b\u4f7f\u3048\u308b\u3002<\/p>\n","protected":false},"author":2,"featured_media":2753,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5,103],"tags":[],"class_list":["post-470","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-r","category-103"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2018\/09\/20180903080254.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/posts\/470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/comments?post=470"}],"version-history":[{"count":2,"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/posts\/470\/revisions"}],"predecessor-version":[{"id":2756,"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/posts\/470\/revisions\/2756"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/media\/2753"}],"wp:attachment":[{"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/media?parent=470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/categories?post=470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/best-biostatistics.com\/toukei-er\/wp-json\/wp\/v2\/tags?post=470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}