{"id":945,"date":"2023-07-28T05:33:50","date_gmt":"2023-07-28T05:33:50","guid":{"rendered":"https:\/\/statorials.org\/ko\/%e1%84%80%e1%85%b3%e1%84%85%e1%85%ae%e1%86%b8-%e1%84%8c%e1%85%a2%e1%84%80%e1%85%a2-%e1%84%83%e1%85%a6%e1%84%8b%e1%85%b5%e1%84%90%e1%85%a5-r\/"},"modified":"2023-07-28T05:33:50","modified_gmt":"2023-07-28T05:33:50","slug":"%e1%84%80%e1%85%b3%e1%84%85%e1%85%ae%e1%86%b8-%e1%84%8c%e1%85%a2%e1%84%80%e1%85%a2-%e1%84%83%e1%85%a6%e1%84%8b%e1%85%b5%e1%84%90%e1%85%a5-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/%e1%84%80%e1%85%b3%e1%84%85%e1%85%ae%e1%86%b8-%e1%84%8c%e1%85%a2%e1%84%80%e1%85%a2-%e1%84%83%e1%85%a6%e1%84%8b%e1%85%b5%e1%84%90%e1%85%a5-r\/","title":{"rendered":"\uc804\uccb4 \uac00\uc774\ub4dc: r\uc5d0\uc11c \ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \ubc29\ubc95"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\ub370\uc774\ud130\ub97c \ubd84\uc11d\ud560 \ub54c \uc218\ud589\ud558\ub294 \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \uc791\uc5c5 \uc911 \ub450 \uac00\uc9c0\ub294 \ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\ud589\ud788 R\uc758 <a href=\"https:\/\/dplyr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">dplyr<\/a> \ud328\ud0a4\uc9c0\ub97c \uc0ac\uc6a9\ud558\uba74 \ub370\uc774\ud130\ub97c \ube60\ub974\uac8c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc740 dplyr\uc744 \uc2dc\uc791\ud558\ub294 \ub370 \ub300\ud55c \ube60\ub978 \uac00\uc774\ub4dc\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>dplyr \ud328\ud0a4\uc9c0 \uc124\uce58 \ubc0f \ub85c\ub4dc<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">dplyr \ud328\ud0a4\uc9c0\uc758 \uae30\ub2a5\uc744 \uc0ac\uc6a9\ud558\ub824\uba74 \uba3c\uc800 \ud328\ud0a4\uc9c0\ub97c \ub85c\ub4dc\ud574\uc57c \ud569\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#install dplyr (if not already installed)\n<span style=\"color: #000000;\">install.packages(' <span style=\"color: #008000;\">dplyr<\/span> ')<\/span>\n\n#load dplyr<\/span> \nlibrary(dplyr)<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c\uc73c\ub85c dplyr\uc758 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec <strong>mtcars<\/strong> \ub77c\ub294 \ub0b4\uc7a5 R \ub370\uc774\ud130 \uc138\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \uba87 \uac00\uc9c0 \uc608\ub97c \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#obtain rows and columns of <em>mtcars<\/em><\/span>\ndim(mtcars)\n\n[1] 32 11\n\n<span style=\"color: #008080;\">#view first six rows of <em>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<p> <span style=\"color: #000000;\">\ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \ub370 \uc0ac\uc6a9\ud560 \uae30\ubcf8 \uad6c\ubb38\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>data %&gt;%\n  <span style=\"color: #3366ff;\">group_by<\/span> (col_name) %&gt;%\n  <span style=\"color: #3366ff;\">summarize<\/span> (summary_name = summary_function)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><em><strong>\ucc38\uace0:<\/strong> summary() \ubc0f summarise() \ud568\uc218\ub294 \ub3d9\uc77c\ud569\ub2c8\ub2e4.<\/em><\/span><\/p>\n<h2> <strong>\uc608 1: \uadf8\ub8f9\ubcc4 \ud3c9\uade0 \ubc0f \uc911\uc559\uac12 \ucc3e\uae30<\/strong><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 \ud3c9\uade0\uacfc \uc911\uc559\uac12\uc744 \ud3ec\ud568\ud558\uc5ec \uadf8\ub8f9\ubcc4 <a href=\"https:\/\/statorials.org\/ko\/\u110c\u116e\u11bc\u1109\u1175\u11b7-\u1100\u1167\u11bc\u1112\u1163\u11bc\u110b\u1173\u11af-\u110e\u1173\u11a8\u110c\u1165\u11bc\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uc911\uc2ec \uacbd\ud5a5 \uce21\uc815\uac12\uc744<\/a> \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#find mean mpg by cylinder<\/span>\nmtcars %&gt;%\n  <span style=\"color: #3366ff;\">group_by<\/span> (cyl) %&gt;%\n  <span style=\"color: #3366ff;\">summarize<\/span> (mean_mpg = mean(mpg, na.rm = <span style=\"color: #008000;\">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<span style=\"color: #008080;\">#find median mpg by cylinder\n<\/span>mtcars %&gt;%\n  <span style=\"color: #3366ff;\">group_by<\/span> (cyl) %&gt;%\n  <span style=\"color: #3366ff;\">summarize<\/span> (median_mpg = median(mpg, na.rm = <span style=\"color: #008000;\">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<h2> <strong>\uc608\uc2dc 2: \uc9d1\ub2e8\ubcc4 \ud655\uc0b0 \ub300\ucc45 \ucc3e\uae30<\/strong><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 \ud45c\uc900 \ud3b8\ucc28, \uc0ac\ubd84\uc704\uac04 \ubc94\uc704, \uc808\ub300 \uc911\uc559\uac12 \ud3b8\ucc28\ub97c \ud3ec\ud568\ud558\uc5ec \uadf8\ub8f9\ubcc4 \ubd84\uc0b0 \uce21\uc815\uac12\uc744 \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#find sd, IQR, and mad by cylinder<\/span>\nmtcars %&gt;%\n<span style=\"color: #3366ff;\">group_by<\/span> (cyl) %&gt;%\n<span style=\"color: #3366ff;\">summarize<\/span> (sd_mpg = sd(mpg, na.rm = <span style=\"color: #008000;\">TRUE<\/span> ),\n            iqr_mpg = IQR(mpg, na.rm = <span style=\"color: #008000;\">TRUE<\/span> ),\n            mad_mpg = mad(mpg, na.rm = <span style=\"color: #008000;\">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<h2> <strong>\uc608\uc2dc 3: \uadf8\ub8f9\ubcc4\ub85c \ubc88\ud638 \ucc3e\uae30<\/strong><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 R\uc5d0\uc11c \uadf8\ub8f9\ubcc4\ub85c \ubc88\ud638\uc640 \uace0\uc720 \ubc88\ud638\ub97c \ucc3e\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#find row count and unique row count by cylinder<\/span>\nmtcars %&gt;%\n<span style=\"color: #3366ff;\">group_by<\/span> (cyl) %&gt;%\n<span style=\"color: #3366ff;\">summarize<\/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<h2> <strong>\uc608\uc2dc 4: \uadf8\ub8f9\ubcc4 \ubc31\ubd84\uc704\uc218 \ucc3e\uae30<\/strong><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 \uc2e4\ub9b0\ub354 \uadf8\ub8f9\ubcc4\ub85c mpg \uac12\uc758 90\ubc88\uc9f8 \ubc31\ubd84\uc704\uc218\ub97c \ucc3e\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#find 90th percentile of mpg for each cylinder group<\/span>\nmtcars %&gt;%\n<span style=\"color: #3366ff;\">group_by<\/span> (cyl) %&gt;%\n<span style=\"color: #3366ff;\">summarize<\/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<h2> <span style=\"color: #000000;\"><strong>\ucd94\uac00 \ub9ac\uc18c\uc2a4<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\"><a href=\"https:\/\/dplyr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uc5ec\uae30\uc5d0\uc11c<\/a> \uc804\uccb4 dplyr \ud328\ud0a4\uc9c0 \ubb38\uc11c\uc640 \uc720\uc6a9\ud55c \uc2dc\uac01\ud654 \uce58\ud2b8 \uc2dc\ud2b8\ub97c \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>group_by()<\/strong> \ubc0f <strong>summary()<\/strong> \uc640 \ud568\uaed8 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ub2e4\ub978 \uc720\uc6a9\ud55c \uae30\ub2a5 <a href=\"https:\/\/statorials.org\/ko\/\u1111\u1175\u11af\u1110\u1165-\u1112\u1162\u11bc-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uc5d0\ub294 \ub370\uc774\ud130 \ud504\ub808\uc784\uc758 \ud589\uc744 \ud544\ud130\ub9c1<\/a> \ud558\uace0 <a href=\"https:\/\/statorials.org\/ko\/\u1105\u1161\u110b\u1175\u11ab-\u110c\u1165\u11bc\u1105\u1175-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">\ud2b9\uc815 \uc21c\uc11c\ub85c \uc815\ub82c\ud558\ub294<\/a> \uae30\ub2a5\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub370\uc774\ud130\ub97c \ubd84\uc11d\ud560 \ub54c \uc218\ud589\ud558\ub294 \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \uc791\uc5c5 \uc911 \ub450 \uac00\uc9c0\ub294 \ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \ub2e4\ud589\ud788 R\uc758 dplyr \ud328\ud0a4\uc9c0\ub97c \uc0ac\uc6a9\ud558\uba74 \ub370\uc774\ud130\ub97c \ube60\ub974\uac8c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc740 dplyr\uc744 \uc2dc\uc791\ud558\ub294 \ub370 \ub300\ud55c \ube60\ub978 \uac00\uc774\ub4dc\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. dplyr \ud328\ud0a4\uc9c0 \uc124\uce58 \ubc0f \ub85c\ub4dc dplyr \ud328\ud0a4\uc9c0\uc758 \uae30\ub2a5\uc744 \uc0ac\uc6a9\ud558\ub824\uba74 \uba3c\uc800 \ud328\ud0a4\uc9c0\ub97c \ub85c\ub4dc\ud574\uc57c \ud569\ub2c8\ub2e4. #install dplyr (if not already installed) install.packages(&#8216; dplyr [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-945","post","type-post","status-publish","format-standard","hentry","category-20"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\uc804\uccb4 \uac00\uc774\ub4dc: R\uc5d0\uc11c \ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \ubc29\ubc95<\/title>\n<meta name=\"description\" content=\"dplyr \ub77c\uc774\ube0c\ub7ec\ub9ac\uc758 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec R\uc5d0\uc11c \ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud55c \uc804\uccb4 \uac00\uc774\ub4dc\uc785\ub2c8\ub2e4.\" \/>\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\/ko\/\u1100\u1173\u1105\u116e\u11b8-\u110c\u1162\u1100\u1162-\u1103\u1166\u110b\u1175\u1110\u1165-r\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\uc804\uccb4 \uac00\uc774\ub4dc: R\uc5d0\uc11c 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\ubc29\ubc95\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/ko\/#website\"},\"datePublished\":\"2023-07-28T05:33:50+00:00\",\"dateModified\":\"2023-07-28T05:33:50+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/ko\/#\/schema\/person\/600556789b7d79cbaa9d9f0c721b74f4\"},\"description\":\"dplyr \ub77c\uc774\ube0c\ub7ec\ub9ac\uc758 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec R\uc5d0\uc11c \ub370\uc774\ud130\ub97c \uadf8\ub8f9\ud654\ud558\uace0 \uc694\uc57d\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud55c \uc804\uccb4 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