{"id":3974,"date":"2023-07-14T10:03:17","date_gmt":"2023-07-14T10:03:17","guid":{"rendered":"https:\/\/statorials.org\/pl\/r-liczyc-duplikaty\/"},"modified":"2023-07-14T10:03:17","modified_gmt":"2023-07-14T10:03:17","slug":"r-liczyc-duplikaty","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/r-liczyc-duplikaty\/","title":{"rendered":"Jak liczy\u0107 duplikaty w r: z przyk\u0142adami"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Do zliczania duplikat\u00f3w w ramce danych w R mo\u017cna u\u017cy\u0107 nast\u0119puj\u0105cych metod:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Metoda 1: Policz zduplikowane warto\u015bci w kolumnie<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum(duplicated(df$my_column))\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 2: Policz zduplikowane wiersze<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>nrow(df[duplicated(df), ])<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 3: Policz duplikaty dla ka\u017cdego unikalnego wiersza<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\ndf %&gt;% group_by_all() %&gt;% count<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce wykorzysta\u0107 ka\u017cd\u0105 metod\u0119 z nast\u0119puj\u0105c\u0105 ramk\u0105 danych w R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create data frame\n<\/span>df = data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'A', 'A', 'A', 'B', 'B', 'B', 'B'),\n                position=c('G', 'G', 'G', 'F', 'G', 'G', 'F', 'F'),\n                points=c(5, 5, 8, 10, 5, 7, 10, 10))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  team position points\n1 GA 5\n2 AG 5\n3 AG 8\n4 AF 10\n5 BG 5\n6 BG 7\n7 BF 10\n8 BF 10\n<\/span><\/span><\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Zlicz zduplikowane warto\u015bci w kolumnie<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 liczb\u0119 zduplikowanych warto\u015bci w kolumnie <strong>punkt\u00f3w<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\"><span style=\"color: #008080;\">#count number of duplicate values in points column\n<\/span><span style=\"color: #000000;\">sum(duplicated(df$points))\n\n[1] 4<\/span><\/span><\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Widzimy, \u017ce w kolumnie <strong>punkt\u00f3w<\/strong> znajduj\u0105 si\u0119 <strong>4<\/strong> zduplikowane warto\u015bci.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Policz zduplikowane wiersze<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 liczb\u0119 zduplikowanych wierszy w ramce danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\"><span style=\"color: #008080;\">#count number of duplicate rows<\/span>\n<span style=\"color: #000000;\">nrow(df[duplicated(df), ])\n\n[1] 2<\/span><\/span><\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Widzimy, \u017ce w ramce danych znajduj\u0105 si\u0119 <strong>2<\/strong> zduplikowane wiersze.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby wy\u015bwietli\u0107 te 2 zduplikowane linie:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\"><span style=\"color: #008080;\">#display duplicated rows<\/span>\n<span style=\"color: #000000;\">df[duplicated(df), ]\n\n  team position points\n2 AG 5\n8 BF 10\n<\/span><\/span><\/strong><\/span><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: Policz duplikaty dla ka\u017cdego unikalnego wiersza<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 liczb\u0119 duplikat\u00f3w dla ka\u017cdego unikalnego wiersza w ramce danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#count number of duplicate rows in data frame\n<\/span>df %&gt;% group_by_all() %&gt;% count\n\n# A tibble: 6 x 4\n# Groups: team, position, points [6]\n  team position points n\n         \n1 AF 10 1\n2 AG 5 2\n3 GA 8 1\n4 BF 10 2\n5 BG 5 1\n6 BG 7 1<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Kolumna <b>n<\/b> wy\u015bwietla liczb\u0119 duplikat\u00f3w dla ka\u017cdego unikalnego wiersza.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe zadania w j\u0119zyku R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/dplyr-znajdz-duplikaty\/\" target=\"_blank\" rel=\"noopener\">Jak znale\u017a\u0107 zduplikowane elementy za pomoc\u0105 dplyr<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/usun-zduplikowane-linie-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak usun\u0105\u0107 zduplikowane linie w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/r-usun-duplikaty-zostaw-nr\/\" target=\"_blank\" rel=\"noopener\">Jak usun\u0105\u0107 zduplikowane linie w R, aby nie pozosta\u0142y \u017cadne<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Do zliczania duplikat\u00f3w w ramce danych w R mo\u017cna u\u017cy\u0107 nast\u0119puj\u0105cych metod: Metoda 1: Policz zduplikowane warto\u015bci w kolumnie sum(duplicated(df$my_column)) Metoda 2: Policz zduplikowane wiersze nrow(df[duplicated(df), ]) Metoda 3: Policz duplikaty dla ka\u017cdego unikalnego wiersza library (dplyr) df %&gt;% group_by_all() %&gt;% count Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce wykorzysta\u0107 ka\u017cd\u0105 metod\u0119 z nast\u0119puj\u0105c\u0105 ramk\u0105 danych [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-3974","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- 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