{"id":945,"date":"2023-07-28T05:33:50","date_gmt":"2023-07-28T05:33:50","guid":{"rendered":"https:\/\/statorials.org\/ja\/%e3%82%af%e3%82%99%e3%83%ab%e3%83%bc%e3%83%95%e3%82%9a%e3%83%ac%e3%82%b7%e3%82%99%e3%83%a5%e3%83%bc%e3%83%a0%e3%83%86%e3%82%99%e3%83%bc%e3%82%bfr\/"},"modified":"2023-07-28T05:33:50","modified_gmt":"2023-07-28T05:33:50","slug":"%e3%82%af%e3%82%99%e3%83%ab%e3%83%bc%e3%83%95%e3%82%9a%e3%83%ac%e3%82%b7%e3%82%99%e3%83%a5%e3%83%bc%e3%83%a0%e3%83%86%e3%82%99%e3%83%bc%e3%82%bfr","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/%e3%82%af%e3%82%99%e3%83%ab%e3%83%bc%e3%83%95%e3%82%9a%e3%83%ac%e3%82%b7%e3%82%99%e3%83%a5%e3%83%bc%e3%83%a0%e3%83%86%e3%82%99%e3%83%bc%e3%82%bfr\/","title":{"rendered":"\u5b8c\u5168\u30ac\u30a4\u30c9: r \u3067\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u304a\u3088\u3073\u8981\u7d04\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"

<\/p>\n

\n

\u30c7\u30fc\u30bf\u5206\u6790\u6642\u306b\u5b9f\u884c\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u30bf\u30b9\u30af\u306e 2 \u3064\u306f\u3001\u30c7\u30fc\u30bf\u306e\u30b0\u30eb\u30fc\u30d7\u5316\u3068\u8981\u7d04\u3067\u3059\u3002<\/span><\/p>\n

\u5e78\u3044\u306a\u3053\u3068\u306b\u3001R \u306edplyr<\/a>\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u3092\u3059\u3070\u3084\u304f\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3001\u8981\u7d04\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n

\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001dplyr \u3092\u4f7f\u3044\u59cb\u3081\u308b\u305f\u3081\u306e\u30af\u30a4\u30c3\u30af \u30ac\u30a4\u30c9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/span><\/p>\n

dplyr \u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u30ed\u30fc\u30c9\u3059\u308b<\/strong><\/span><\/h2>\n

dplyr \u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u307e\u305a\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30ed\u30fc\u30c9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n

 #install dplyr (if not already installed)\ninstall.packages(' dplyr<\/span> ')<\/span>\n\n#load dplyr<\/span> \nlibrary(dplyr)<\/strong><\/pre>\n
\u6b21\u306b\u3001 dplyr \u306e\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001 mtcars<\/strong>\u3068\u3044\u3046\u7d44\u307f\u8fbc\u307f\u306e R \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3001\u8981\u7d04\u3059\u308b\u4f8b\u3092\u3044\u304f\u3064\u304b\u793a\u3057\u307e\u3059\u3002<\/span><\/p>\n
 #obtain rows and columns of mtcars<\/em><\/span>\ndim(mtcars)\n\n[1] 32 11\n\n#view first six rows of mtcars<\/em>\n<\/span>head(mtcars)\n\n                   mpg cyl disp hp drat wt qsec vs am gear carb\nMazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4\nMazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4\nDatsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1\nHornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1\nHornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2\nValiant 18.1 6 225 105 2.76 3,460 20.22 1 0 3 1<\/strong><\/pre>\n
\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3066\u8981\u7d04\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/span><\/p>\n
 data %>%\n  group_by<\/span> (col_name) %>%\n  summarize<\/span> (summary_name = summary_function)\n<\/strong><\/pre>\n
\u6ce8:<\/strong> summary() \u95a2\u6570\u3068 summarise() \u95a2\u6570\u306f\u540c\u7b49\u3067\u3059\u3002<\/em><\/span><\/p>\n
\u4f8b 1: \u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306e\u5e73\u5747\u3068\u4e2d\u592e\u5024\u3092\u6c42\u3081\u308b<\/strong><\/h2>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001\u5e73\u5747\u3068\u4e2d\u592e\u5024\u3092\u542b\u3080\u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306e\u4e2d\u5fc3\u50be\u5411\u306e\u5c3a\u5ea6\u3092<\/a>\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n
 #find mean mpg by cylinder<\/span>\nmtcars %>%\n  group_by<\/span> (cyl) %>%\n  summarize<\/span> (mean_mpg = mean(mpg, na.rm = TRUE<\/span> ))\n\n# A tibble: 3 x 2\n    cyl mean_mpg\n      \n1 4 26.7\n2 6 19.7\n3 8 15.1\n\n#find median mpg by cylinder\n<\/span>mtcars %>%\n  group_by<\/span> (cyl) %>%\n  summarize<\/span> (median_mpg = median(mpg, na.rm = TRUE<\/span> ))\n\n# A tibble: 3 x 2\n    cyl median_mpg\n        \n1 4 26  \n2 6 19.7\n3 8 15.2<\/strong><\/pre>\n
\u4f8b 2: \u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306e\u5e83\u304c\u308a\u306e\u5c3a\u5ea6\u3092\u898b\u3064\u3051\u308b<\/strong><\/h2>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001\u6a19\u6e96\u504f\u5dee\u3001\u56db\u5206\u4f4d\u7bc4\u56f2\u3001\u7d76\u5bfe\u4e2d\u592e\u5024\u504f\u5dee\u306a\u3069\u3001\u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306e\u5206\u6563\u5c3a\u5ea6\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n
 #find sd, IQR, and mad by cylinder<\/span>\nmtcars %>%\ngroup_by<\/span> (cyl) %>%\nsummarize<\/span> (sd_mpg = sd(mpg, na.rm = TRUE<\/span> ),\n            iqr_mpg = IQR(mpg, na.rm = TRUE<\/span> ),\n            mad_mpg = mad(mpg, na.rm = TRUE<\/span> ))\n\n# A tibble: 3 x 4\n    cyl sd_mpg iqr_mpg mad_mpg\n          \n1 4 4.51 7.60 6.52\n2 6 1.45 2.35 1.93\n3 8 2.56 1.85 1.56<\/strong><\/pre>\n
\u4f8b 3: \u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306b\u6570\u5024\u3092\u691c\u7d22\u3059\u308b<\/strong><\/h2>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001R \u3067\u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306b\u756a\u53f7\u3068\u4e00\u610f\u306e\u756a\u53f7\u3092\u691c\u7d22\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n
 #find row count and unique row count by cylinder<\/span>\nmtcars %>%\ngroup_by<\/span> (cyl) %>%\nsummarize<\/span> (count_mpg = n(),\n            u_count_mpg = n_distinct(mpg))\n\n# A tibble: 3 x 3\n    cyl count_mpg u_count_mpg\n              \n1 4 11 9\n2 6 7 6\n3 8 14 12\n<\/strong><\/pre>\n
\u4f8b 4: \u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306e\u30d1\u30fc\u30bb\u30f3\u30bf\u30a4\u30eb\u306e\u691c\u7d22<\/strong><\/h2>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001\u30b7\u30ea\u30f3\u30c0\u30fc \u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306e mpg \u5024\u306e 90 \u30d1\u30fc\u30bb\u30f3\u30bf\u30a4\u30eb\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n
 #find 90th percentile of mpg for each cylinder group<\/span>\nmtcars %>%\ngroup_by<\/span> (cyl) %>%\nsummarize<\/span> (quant90 = quantile(mpg, probs = .9))\n\n# A tibble: 3 x 2\n    cyl quant90\n     \n1 4 32.4\n2 6 21.2\n3 8 18.3<\/strong><\/pre>\n
\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/strong><\/span><\/h2>\n
dplyr \u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u5b8c\u5168\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u5f79\u7acb\u3064\u8996\u899a\u5316\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8\u306f\u3001\u3053\u3053\u3067<\/a>\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n
 group_by()<\/strong>\u304a\u3088\u3073summary()<\/strong>\u3067\u4f7f\u7528\u3067\u304d\u308b\u305d\u306e\u4ed6\u306e\u4fbf\u5229\u306a\u95a2\u6570\u306b\u306f\u3001\u30c7\u30fc\u30bf \u30d5\u30ec\u30fc\u30e0\u306e\u884c\u3092\u30d5\u30a3\u30eb\u30bf\u30fc\u3057<\/a>\u3001 \u7279\u5b9a\u306e\u9806\u5e8f\u3067\u4e26\u3079\u308b<\/a>\u95a2\u6570\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
\u30c7\u30fc\u30bf\u5206\u6790\u6642\u306b\u5b9f\u884c\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u30bf\u30b9\u30af\u306e 2 \u3064\u306f\u3001\u30c7\u30fc\u30bf\u306e\u30b0\u30eb\u30fc\u30d7\u5316\u3068\u8981\u7d04\u3067\u3059\u3002 \u5e78\u3044\u306a\u3053\u3068\u306b\u3001R \u306edplyr\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u3092\u3059\u3070\u3084\u304f\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3001\u8981\u7d04\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001 […]<\/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-945","post","type-post","status-publish","format-standard","hentry","category-16"],"yoast_head":"\n\u5b8c\u5168\u30ac\u30a4\u30c9: R \u3067\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3066\u8981\u7d04\u3059\u308b\u65b9\u6cd5<\/title>\n<meta name=\"description\" content=\"dplyr \u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001R \u3067\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u304a\u3088\u3073\u8981\u7d04\u3059\u308b\u305f\u3081\u306e\u5b8c\u5168\u306a\u30ac\u30a4\u30c9\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\/\u30af\u3099\u30eb\u30fc\u30d5\u309a\u30ec\u30b7\u3099\u30e5\u30fc\u30e0\u30c6\u3099\u30fc\u30bfr\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5b8c\u5168\u30ac\u30a4\u30c9: R \u3067\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3066\u8981\u7d04\u3059\u308b\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"dplyr \u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001R \u3067\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u304a\u3088\u3073\u8981\u7d04\u3059\u308b\u305f\u3081\u306e\u5b8c\u5168\u306a\u30ac\u30a4\u30c9\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/ja\/\u30af\u3099\u30eb\u30fc\u30d5\u309a\u30ec\u30b7\u3099\u30e5\u30fc\u30e0\u30c6\u3099\u30fc\u30bfr\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T05:33:50+00:00\" \/>\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 name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u30d9\u30f3\u30b8\u30e3\u30df\u30f3\u30fb\u30a2\u30f3\u30c0\u30fc\u30bd\u30f3\u535a\u58eb\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/ja\/%e3%82%af%e3%82%99%e3%83%ab%e3%83%bc%e3%83%95%e3%82%9a%e3%83%ac%e3%82%b7%e3%82%99%e3%83%a5%e3%83%bc%e3%83%a0%e3%83%86%e3%82%99%e3%83%bc%e3%82%bfr\/\",\"url\":\"https:\/\/statorials.org\/ja\/%e3%82%af%e3%82%99%e3%83%ab%e3%83%bc%e3%83%95%e3%82%9a%e3%83%ac%e3%82%b7%e3%82%99%e3%83%a5%e3%83%bc%e3%83%a0%e3%83%86%e3%82%99%e3%83%bc%e3%82%bfr\/\",\"name\":\"\u5b8c\u5168\u30ac\u30a4\u30c9: R 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