{"id":1859,"date":"2023-07-24T17:06:16","date_gmt":"2023-07-24T17:06:16","guid":{"rendered":"https:\/\/statorials.org\/ko\/r-%e1%84%8b%e1%85%a7%e1%86%af%e1%84%8b%e1%85%b4-%e1%84%87%e1%85%a1%e1%86%af%e1%84%89%e1%85%a2%e1%86%bc-%e1%84%92%e1%85%ac%e1%86%ba%e1%84%89%e1%85%ae-%e1%84%80%e1%85%a8%e1%84%89%e1%85%a1%e1%86%ab\/"},"modified":"2023-07-24T17:06:16","modified_gmt":"2023-07-24T17:06:16","slug":"r-%e1%84%8b%e1%85%a7%e1%86%af%e1%84%8b%e1%85%b4-%e1%84%87%e1%85%a1%e1%86%af%e1%84%89%e1%85%a2%e1%86%bc-%e1%84%92%e1%85%ac%e1%86%ba%e1%84%89%e1%85%ae-%e1%84%80%e1%85%a8%e1%84%89%e1%85%a1%e1%86%ab","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/r-%e1%84%8b%e1%85%a7%e1%86%af%e1%84%8b%e1%85%b4-%e1%84%87%e1%85%a1%e1%86%af%e1%84%89%e1%85%a2%e1%86%bc-%e1%84%92%e1%85%ac%e1%86%ba%e1%84%89%e1%85%ae-%e1%84%80%e1%85%a8%e1%84%89%e1%85%a1%e1%86%ab\/","title":{"rendered":"R\uc758 \uc5f4\uc5d0\uc11c \ubc1c\uc0dd \ud69f\uc218\ub97c \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95"},"content":{"rendered":"

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R\uc5d0\uc11c \ub2e4\uc74c \uad6c\ubb38\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub370\uc774\ud130 \ud504\ub808\uc784 \uc5f4\uc5d0\uc11c \ud2b9\uc815 \uac12\uc758 \ubc1c\uc0dd \ud69f\uc218\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

 #count number of occurrences of each value in column<\/span>\ntable(df$column_name)\n\n#count number of occurrences of each value (including NA values) in column\n<\/span>table(df$column_name, useNA = ' always<\/span> ')\n\n#count number of occurrences of specific value<\/span>\nlength(which(df$column_name== value<\/span> ))\n<\/strong><\/pre>\n
 \ub2e4\uc74c \uc608\uc5d0\uc11c\ub294 \ub2e4\uc74c \ub370\uc774\ud130 \ud504\ub808\uc784\uc5d0\uc11c \uc2e4\uc81c\ub85c \uc774 \uad6c\ubb38\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n
 #create data frame\n<\/span>df <- data. frame<\/span> (player=c('A', 'B', 'C', 'D', 'E', 'F'),\n                 team=c('Mavs', 'Mavs', 'Suns', 'Nets', 'Nets', 'Nets'),\n                 points=c(20, 22, 26, 30, 30, NA))\n\n#view data frame\n<\/span>df\n\n  player team points\n1 A Mavs 20\n2 B Mavs 22\n3 C Suns 26\n4 D Nets 30\n5 E Nets 30\n6 F Nets NA\n<\/strong><\/pre>\n
 \uc608\uc2dc 1: \uc5f4\uc758 \uac12 \ubc1c\uc0dd \ud69f\uc218 \uacc4\uc0b0<\/strong><\/span><\/h3>\n
 \ub2e4\uc74c \ucf54\ub4dc\ub294 “\ud300” \uc5f4\uc5d0\uc11c \uac01 \uac12\uc758 \ubc1c\uc0dd \ud69f\uc218\ub97c \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n
 #count number of occurrences of each team<\/span>\ntable(df$team)\n\nMavs Nets Suns \n   2 3 1 \n<\/strong><\/pre>\n
 \uc774\ub294 \uc6b0\ub9ac\uc5d0\uac8c \ub2e4\uc74c\uc744 \uc54c\ub824\uc90d\ub2c8\ub2e4.<\/span><\/p>\n