{"id":3927,"date":"2023-07-14T17:12:50","date_gmt":"2023-07-14T17:12:50","guid":{"rendered":"https:\/\/statorials.org\/pl\/r-skumulowana-suma-na-grupe\/"},"modified":"2023-07-14T17:12:50","modified_gmt":"2023-07-14T17:12:50","slug":"r-skumulowana-suma-na-grupe","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/r-skumulowana-suma-na-grupe\/","title":{"rendered":"Jak obliczy\u0107 skumulowan\u0105 sum\u0119 na grup\u0119 w r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Aby obliczy\u0107 skumulowan\u0105 sum\u0119 na grup\u0119 w R, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Metoda 1: U\u017cyj podstawy R<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df$cum_sum &lt;- ave(df$values_var, df$group_var, FUN=cumsum)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 2: u\u017cyj dplyr<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\ndf %&gt;% group_by(group_var) %&gt;% mutate(cum_sum = cumsum(values_var))\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 3: U\u017cyj data.table<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (data.table)\n\nsetDT(df)[, cum_sum := cumsum(values_var), group_var] \n<\/strong><\/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;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (store=rep(c(' <span style=\"color: #ff0000;\">A<\/span> ', ' <span style=\"color: #ff0000;\">B<\/span> ', ' <span style=\"color: #ff0000;\">C<\/span> '), each= <span style=\"color: #008000;\">4<\/span> ),\n                 sales=c(3, 4, 4, 2, 5, 8, 9, 7, 6, 8, 3, 2))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n   blind sales\n1 to 3\n2 to 4\n3 to 4\n4 to 2\n5 B 5\n6 B 8\n7 B 9\n8 B 7\n9 C 6\n10 C 8\n11 C 3\n12 C 2\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: oblicz skumulowan\u0105 sum\u0119 na grup\u0119, korzystaj\u0105c z podstawy R<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak u\u017cywa\u0107 funkcji <strong>ave()<\/strong> bazy danych R do obliczenia skumulowanej sumy <strong>sprzeda\u017cy<\/strong> pogrupowanej wed\u0142ug <strong>sklep\u00f3w<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#add column to show cumulative sales by store\n<\/span>df$cum_sales &lt;- ave(df$sales, df$store, FUN=cumsum)\n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n   store sales cum_sales\n1 to 3 3\n2 to 4 7\n3 to 4 11\n4 to 2 13\n5 B 5 5\n6 B 8 13\n7 B 9 22\n8 B 7 29\n9 C 6 6\n10 C 8 14\n11 C 3 17\n12 C 2 19<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nowa kolumna o nazwie <strong>cum_sales<\/strong> wy\u015bwietla skumulowan\u0105 sum\u0119 <strong>sprzeda\u017cy<\/strong> pogrupowan\u0105 wed\u0142ug <strong>sklep\u00f3w<\/strong> .<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Oblicz skumulowan\u0105 sum\u0119 na grup\u0119 za pomoc\u0105 dplyr<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod ilustruje spos\u00f3b u\u017cycia r\u00f3\u017cnych funkcji z pakietu dplyr w R do obliczenia skumulowanej sumy <strong>sprzeda\u017cy<\/strong> pogrupowanej wed\u0142ug <strong>sklep\u00f3w<\/strong> :<\/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 column to show cumulative sales by store\n<\/span>df %&gt;% group_by(store) %&gt;% mutate(cum_sales = cumsum(sales))\n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n# A tibble: 12 x 3\n# Groups: store [3]\n   store sales cum_sales\n         \n 1 to 3 3\n 2 to 4 7\n 3 to 4 11\n 4 to 2 13\n 5 B 5 5\n 6 B 8 13\n 7 B 9 22\n 8 B 7 29\n 9 C 6 6\n10 C 8 14\n11 C 3 17\n12 C 2 19\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nowa kolumna o nazwie <strong>cum_sales<\/strong> wy\u015bwietla skumulowan\u0105 sum\u0119 <strong>sprzeda\u017cy<\/strong> pogrupowan\u0105 wed\u0142ug <strong>sklep\u00f3w<\/strong> .<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: Oblicz skumulowan\u0105 sum\u0119 wed\u0142ug grupy za pomoc\u0105 data.table<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod ilustruje spos\u00f3b u\u017cycia r\u00f3\u017cnych funkcji z pakietu data.table w R do obliczenia skumulowanej sumy <strong>sprzeda\u017cy<\/strong> pogrupowanej wed\u0142ug <strong>sklep\u00f3w<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (data.table)\n\n<span style=\"color: #008080;\">#add column to show cumulative sales by store\n<\/span>setDT(df)[, cum_sales := cumsum(sales), store] \n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n    store sales cum_sales\n 1: A 3 3\n 2: A 4 7\n 3: A 4 11\n 4: A 2 13\n 5: B 5 5\n 6: B 8 13\n 7: B 9 22\n 8: B 7 29\n 9: C 6 6\n10: C 8 14\n11: C 3 17\n12: C 2 19<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nowa kolumna o nazwie <strong>cum_sales<\/strong> wy\u015bwietla skumulowan\u0105 sum\u0119 <strong>sprzeda\u017cy<\/strong> pogrupowan\u0105 wed\u0142ug <strong>sklep\u00f3w<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : wszystkie trzy metody daj\u0105 ten sam wynik. Jednak metody dplyr i data.table b\u0119d\u0105 zazwyczaj szybsze podczas pracy z bardzo du\u017cymi ramkami danych.<\/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 obliczenia w R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/suma-wed\u0142ug-grup-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak obliczy\u0107 sum\u0119 wed\u0142ug grupy w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/r-srednia-na-grupe\/\" target=\"_blank\" rel=\"noopener\">Jak obliczy\u0107 \u015bredni\u0105 na grup\u0119 w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/odchylenie-standardowe-wed\u0142ug-grupy-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak obliczy\u0107 odchylenie standardowe wed\u0142ug grupy w R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aby obliczy\u0107 skumulowan\u0105 sum\u0119 na grup\u0119 w R, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod: Metoda 1: U\u017cyj podstawy R df$cum_sum &lt;- ave(df$values_var, df$group_var, FUN=cumsum) Metoda 2: u\u017cyj dplyr library (dplyr) df %&gt;% group_by(group_var) %&gt;% mutate(cum_sum = cumsum(values_var)) Metoda 3: U\u017cyj data.table library (data.table) setDT(df)[, cum_sum := cumsum(values_var), group_var] Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce wykorzysta\u0107 ka\u017cd\u0105 metod\u0119 [&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-3927","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - 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