{"id":3993,"date":"2023-07-14T07:10:02","date_gmt":"2023-07-14T07:10:02","guid":{"rendered":"https:\/\/statorials.org\/ko\/r%e1%84%8b%e1%85%b4-n-%e1%84%92%e1%85%a1%e1%86%b7%e1%84%89%e1%85%ae\/"},"modified":"2023-07-14T07:10:02","modified_gmt":"2023-07-14T07:10:02","slug":"r%e1%84%8b%e1%85%b4-n-%e1%84%92%e1%85%a1%e1%86%b7%e1%84%89%e1%85%ae","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/r%e1%84%8b%e1%85%b4-n-%e1%84%92%e1%85%a1%e1%86%b7%e1%84%89%e1%85%ae\/","title":{"rendered":"R\uc5d0\uc11c n() \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95(\uc608\uc81c \ud3ec\ud568)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">R\uc758 <a href=\"https:\/\/dplyr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">dplyr<\/a> \ud328\ud0a4\uc9c0\uc5d0 \uc788\ub294 <strong>n()<\/strong> \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\uc758 \uad00\uce21\uce58 \uc218\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc2e4\uc81c\ub85c \uc774 \uae30\ub2a5\uc744 \uc0ac\uc6a9\ud558\ub294 \uc138 \uac00\uc9c0 \uc77c\ubc18\uc801\uc778 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\ubc29\ubc95 1: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4 \uad00\uce21\uac12 \uacc4\uc0b0<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>df %&gt;%\n  group_by(group_variable) %&gt;%\n  summarize(count = n())\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\"><strong>\ubc29\ubc95 2: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4 \uad00\uce21\uce58\ub97c \ud45c\uc2dc\ud558\ub294 \uc5f4\uc744 \ucd94\uac00\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>df %&gt;%\n  group_by(group_variable) %&gt;%\n  mutate(count = n())<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\"><strong>\ubc29\ubc95 3: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4 \uad00\ucc30\uc744 \uae30\ubc18\uc73c\ub85c \ud544\ud130\ub9c1<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>df %&gt;%\n  group_by(group_variable) %&gt;%\n  filter(n() &gt; <span style=\"color: #008000;\">15<\/span> )<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \uc608\uc5d0\uc11c\ub294 \ub2e4\uc591\ud55c \ub18d\uad6c \uc120\uc218\uc5d0 \ub300\ud55c \uc815\ubcf4\uac00 \ud3ec\ud568\ub41c R\uc758 \ub2e4\uc74c \ub370\uc774\ud130 \ud504\ub808\uc784\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc2e4\uc81c\ub85c \uac01 \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\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;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'A', 'A', 'B', 'B', 'C'),\n                 points=c(22, 25, 25, 20, 29, 13),\n                 assists=c(10, 12, 9, 4, 11, 10),\n                 rebounds=c(9, 8, 5, 10, 14, 12))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  team points assists rebounds\n1 A 22 10 9\n2 A 25 12 8\n3 to 25 9 5\n4 B 20 4 10\n5 B 29 11 14\n6 C 13 10 12\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>\uc608 1: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4\ub85c \uad00\uce21\uac12 \uacc4\uc0b0<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 <strong>n()<\/strong> \ud568\uc218\ub97c <strong>summarise()<\/strong> \ud568\uc218\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud558\uc5ec <strong>\ud300\ub2f9<\/strong> \uad00\uce21\uce58 \uc218\ub97c \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: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#count number of observations by team<\/span>\ndf %&gt;%\n  group_by(team) %&gt;%\n  summarize(count = n())\n\n# A tibble: 3 x 2\n  team count\n   \n1 to 3\n2 B 2\n3 C 1<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\uacb0\uacfc\uc5d0\uc11c \uc6b0\ub9ac\ub294 \ub2e4\uc74c\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>A<\/strong> \ud300\uc740 3\ubc88 \ub4f1\uc7a5<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>B<\/strong> \ud300 2\ud68c \ub4f1\uc7a5<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>C<\/strong> \ud300 1\ud68c \ub4f1\uc7a5<\/span><\/li>\n<\/ul>\n<h2> <span style=\"color: #000000;\"><strong>\uc608 2: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4 \uad00\uce21\uce58\ub97c \ud45c\uc2dc\ud558\ub294 \uc5f4 \ucd94\uac00<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 <strong>n()<\/strong> \ud568\uc218\ub97c <strong>mutate()<\/strong> \ud568\uc218\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud558\uc5ec <strong>\ud300\ub2f9<\/strong> \uad00\uce21\uce58 \uc218\uac00 \ud3ec\ud568\ub41c \ub0a0\uc9dc \ud504\ub808\uc784\uc5d0 \uc5f4\uc744 \ucd94\uac00\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: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#add new column that shows number of observations by team<\/span>\ndf %&gt;%\n  group_by(team) %&gt;%\n  mutate(count = n())\n\n# A tibble: 6 x 5\n# Groups: team [3]\n  team points assists rebounds count\n            \n1 to 22 10 9 3\n2 to 25 12 8 3\n3 to 25 9 5 3\n4 B 20 4 10 2\n5 B 29 11 14 2\n6 C 13 10 12 1<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\"><strong>count<\/strong> \ub77c\ub294 \uc0c8 \uc5f4\uc5d0\ub294 \ub370\uc774\ud130 \ud504\ub808\uc784\uc758 \uac01 \ud589\uc5d0 \ub300\ud55c \ud300 \uc218\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/span><\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>\uc608 3: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4 \uad00\ucc30\uc744 \uae30\uc900\uc73c\ub85c \ud544\ud130\ub9c1<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 <strong>n()<\/strong> \ud568\uc218\ub97c <strong>filter()<\/strong> \ud568\uc218\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud558\uc5ec \ud300\uc774 \ub450 \ubc88 \uc774\uc0c1 \ub098\ud0c0\ub098\ub294 \ud589\ub9cc \ud45c\uc2dc\ud558\ub3c4\ub85d \ub370\uc774\ud130 \ud504\ub808\uc784\uc744 \ud544\ud130\ub9c1\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: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#filter rows where team count is greater than 1<\/span>\ndf %&gt;%\n  group_by(team) %&gt;%\n  filter(n() &gt; <span style=\"color: #008000;\">1<\/span> )\n\n# A tibble: 5 x 4\n# Groups: team [2]\n  team points assists rebounds\n           \n1 A 22 10 9\n2 A 25 12 8\n3 to 25 9 5\n4 B 20 4 10\n5 B 29 11 14<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">\uacb0\uacfc \ub370\uc774\ud130 \ud504\ub808\uc784\uc5d0\ub294 \ud300\uc774 &#8220;A&#8221; \ub610\ub294 &#8220;B&#8221;\uc778 \ud589\ub9cc \ud3ec\ud568\ub429\ub2c8\ub2e4. \uc774\ub294 \uc22b\uc790\uac00 1\ubcf4\ub2e4 \ud070 \uc720\uc77c\ud55c \ud300\uc774\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/span><\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>\ucd94\uac00 \ub9ac\uc18c\uc2a4<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 R\uc5d0\uc11c \ub2e4\ub978 \uc77c\ubc18\uc801\uc778 \uae30\ub2a5\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/ko\/dplyr\u1105\u1173\u11af-\u1110\u1169\u11bc\u1112\u1162\/\" target=\"_blank\" rel=\"noopener\">dplyr\uc5d0\uc11c across() \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95<\/a><br \/> <a href=\"https:\/\/statorials.org\/ko\/dplyr-\u110b\u1175\u1103\u1169\u11bc\/\" target=\"_blank\" rel=\"noopener\">dplyr\uc5d0\uc11c relocate() \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95<\/a><br \/> <a href=\"https:\/\/statorials.org\/ko\/dplyr-\u1109\u1173\u11af\u1105\u1161\u110b\u1175\u1109\u1173\/\" target=\"_blank\" rel=\"noopener\">dplyr\uc5d0\uc11c Slice() \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>R\uc758 dplyr \ud328\ud0a4\uc9c0\uc5d0 \uc788\ub294 n() \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\uc758 \uad00\uce21\uce58 \uc218\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc2e4\uc81c\ub85c \uc774 \uae30\ub2a5\uc744 \uc0ac\uc6a9\ud558\ub294 \uc138 \uac00\uc9c0 \uc77c\ubc18\uc801\uc778 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. \ubc29\ubc95 1: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4 \uad00\uce21\uac12 \uacc4\uc0b0 df %&gt;% group_by(group_variable) %&gt;% summarize(count = n()) \ubc29\ubc95 2: n()\uc744 \uc0ac\uc6a9\ud558\uc5ec \uadf8\ub8f9\ubcc4 \uad00\uce21\uce58\ub97c \ud45c\uc2dc\ud558\ub294 \uc5f4\uc744 \ucd94\uac00\ud569\ub2c8\ub2e4. df %&gt;% group_by(group_variable) %&gt;% mutate(count = n()) \ubc29\ubc95 3: [&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-3993","post","type-post","status-publish","format-standard","hentry","category-20"],"yoast_head":"<!-- This site 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