{"id":4189,"date":"2023-07-12T23:54:51","date_gmt":"2023-07-12T23:54:51","guid":{"rendered":"https:\/\/statorials.org\/pl\/statystyki-podsumowujace-w-r-dplyr\/"},"modified":"2023-07-12T23:54:51","modified_gmt":"2023-07-12T23:54:51","slug":"statystyki-podsumowujace-w-r-dplyr","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/statystyki-podsumowujace-w-r-dplyr\/","title":{"rendered":"Jak obliczy\u0107 statystyki podsumowuj\u0105ce w r za pomoc\u0105 dplyr"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 poni\u017cszej sk\u0142adni, aby obliczy\u0107 statystyki podsumowuj\u0105ce dla wszystkich zmiennych numerycznych w ramce danych w R, u\u017cywaj\u0105c funkcji z pakietu <strong>dplyr<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n<span style=\"color: #008000;\">library<\/span> (tidyr)\n\ndf %&gt;% summarise(across(where(is. <span style=\"color: #3366ff;\">numeric<\/span> ), .fns = \n                     list(min = min,\n                          median = median,\n                          mean = mean,\n                          stdev = sd,\n                          q25 = ~quantile(., <span style=\"color: #008000;\">0.25<\/span> ),\n                          q75 = ~quantile(., <span style=\"color: #008000;\">0.75<\/span> ),\n                          max = max))) %&gt;%\n  pivot_longer(everything(), names_sep=' <span style=\"color: #ff0000;\">_<\/span> ', names_to=c(' <span style=\"color: #ff0000;\">variable<\/span> ', ' <span style=\"color: #ff0000;\">.value<\/span> '))\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Funkcja <strong>podsumowania()<\/strong> pochodzi z pakietu <strong>dplyr<\/strong> i s\u0142u\u017cy do obliczania statystyk podsumowuj\u0105cych dla zmiennych.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Funkcja <strong>przestawna_longer()<\/strong> pochodzi z pakietu <strong>Tidyr<\/strong> i s\u0142u\u017cy do formatowania danych wyj\u015bciowych, aby by\u0142y \u0142atwiejsze do odczytania.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ta konkretna sk\u0142adnia oblicza nast\u0119puj\u0105ce statystyki podsumowuj\u0105ce dla ka\u017cdej zmiennej numerycznej w ramce danych:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Minimalna warto\u015b\u0107<\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 \u015brednia<\/span><\/li>\n<li> <span style=\"color: #000000;\">\u015arednia warto\u015b\u0107<\/span><\/li>\n<li> <span style=\"color: #000000;\">Odchylenie standardowe<\/span><\/li>\n<li> <span style=\"color: #000000;\">25 percentyl<\/span><\/li>\n<li> <span style=\"color: #000000;\">75. percentyl<\/span><\/li>\n<li> <span style=\"color: #000000;\">Maksymalna warto\u015b\u0107<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Poni\u017cszy przyk\u0142ad pokazuje, jak w praktyce wykorzysta\u0107 t\u0119 funkcj\u0119.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad: Oblicz statystyki podsumowuj\u0105ce w R za pomoc\u0105 dplyr<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych w R, kt\u00f3ra zawiera informacje o r\u00f3\u017cnych koszykarzach:<\/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', 'A', 'B', 'B', 'B', 'B'),\n                 points=c(12, 15, 19, 14, 24, 25, 39, 34),\n                 assists=c(6, 8, 8, 9, 12, 6, 8, 10),\n                 rebounds=c(9, 9, 8, 10, 8, 4, 3, 3))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  team points assists rebounds\n1 to 12 6 9\n2 A 15 8 9\n3 A 19 8 8\n4 A 14 9 10\n5 B 24 12 8\n6 B 25 6 4\n7 B 39 8 3\n8 B 34 10 3<\/strong>\n<\/pre>\n<p> <span style=\"color: #000000;\">Do obliczenia statystyk podsumowuj\u0105cych dla ka\u017cdej zmiennej numerycznej w ramce danych mo\u017cemy zastosowa\u0107 nast\u0119puj\u0105c\u0105 sk\u0142adni\u0119:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n<span style=\"color: #008000;\">library<\/span> (tidyr)\n\n<span style=\"color: #008080;\">#calculate summary statistics for each numeric variable in data frame\n<\/span>df %&gt;% summarise(across(where(is. <span style=\"color: #3366ff;\">numeric<\/span> ), .fns = \n                     list(min = min,\n                          median = median,\n                          mean = mean,\n                          stdev = sd,\n                          q25 = ~quantile(., <span style=\"color: #008000;\">0.25<\/span> ),\n                          q75 = ~quantile(., <span style=\"color: #008000;\">0.75<\/span> ),\n                          max = max))) %&gt;%\n  pivot_longer(everything(), names_sep=' <span style=\"color: #ff0000;\">_<\/span> ', names_to=c(' <span style=\"color: #ff0000;\">variable<\/span> ', ' <span style=\"color: #ff0000;\">.value<\/span> '))\n\n# A tibble: 3 x 8\n  variable min median mean stdev q25 q75 max\n             \n1 points 12 21.5 22.8 9.74 14.8 27.2 39\n2 assists 6 8 8.38 2.00 7.5 9.25 12\n3 rebounds 3 8 6.75 2.92 3.75 9 10\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>&nbsp;<\/strong> Z wyniku mo\u017cemy zobaczy\u0107:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Minimalna warto\u015b\u0107 w kolumnie punkt\u00f3w wynosi <strong>12<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">Mediana warto\u015bci w kolumnie punkt\u00f3w wynosi <strong>21,5<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">\u015arednia warto\u015b\u0107 w kolumnie punkt\u00f3w wynosi <strong>22,8<\/strong> .<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">I tak dalej.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : w tym przyk\u0142adzie u\u017cyli\u015bmy funkcji dplyr <strong>Through()<\/strong> . Pe\u0142n\u0105 dokumentacj\u0119 tej funkcji mo\u017cna znale\u017a\u0107 <a href=\"https:\/\/dplyr.tidyverse.org\/reference\/across.html\" target=\"_blank\" rel=\"noopener\">tutaj<\/a> .<\/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 funkcje za pomoc\u0105 dplyr:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/dplyr-podsumowuj-zachowaj-kolumny\/\" target=\"_blank\" rel=\"noopener\">Jak podsumowa\u0107 dane, ale zachowa\u0107 wszystkie kolumny za pomoc\u0105 dplyr<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/dplyr-podsumowuje-wiele-kolumn\/\" target=\"_blank\" rel=\"noopener\">Jak podsumowa\u0107 wiele kolumn za pomoc\u0105 dplyr<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/odchylenie-standardowe-dplyr\/\" target=\"_blank\" rel=\"noopener\">Jak obliczy\u0107 odchylenie standardowe za pomoc\u0105 dplyr<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 poni\u017cszej sk\u0142adni, aby obliczy\u0107 statystyki podsumowuj\u0105ce dla wszystkich zmiennych numerycznych w ramce danych w R, u\u017cywaj\u0105c funkcji z pakietu dplyr : library (dplyr) library (tidyr) df %&gt;% summarise(across(where(is. numeric ), .fns = list(min = min, median = median, mean = mean, stdev = sd, q25 = ~quantile(., 0.25 ), q75 = ~quantile(., 0.75 [&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-4189","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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