{"id":3054,"date":"2023-07-19T10:33:55","date_gmt":"2023-07-19T10:33:55","guid":{"rendered":"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/"},"modified":"2023-07-19T10:33:55","modified_gmt":"2023-07-19T10:33:55","slug":"srednia-w-kolumnie-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/","title":{"rendered":"Jak obliczy\u0107 \u015bredni\u0105 kolumny w r (z przyk\u0142adami)"},"content":{"rendered":"

<\/p>\n

\n

Do obliczenia \u015bredniej kolumny w R mo\u017cna u\u017cy\u0107 dowolnej z nast\u0119puj\u0105cych metod:<\/span><\/p>\n

 #calculate mean using column name<\/span>\nmean(df$my_column)\n\n#calculate mean using column name (ignore missing values)\n<\/span>mean(df$my_column, na. rm<\/span> = TRUE<\/span> )\n\n#calculate mean using column position<\/span>\nmean(df[, 1])\n\n#calculation mean of all numeric columns\n<\/span>colMeans(df[sapply(df, is. numeric<\/span> )])\n<\/b><\/pre>\n
 Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 ka\u017cdej metody z nast\u0119puj\u0105c\u0105 ramk\u0105 danych w R:<\/span><\/p>\n
 #create data frame\n<\/span>df <- data. frame<\/span> (team=c('A', 'A', 'A', 'B', 'B', 'B'),\n                 points=c(99, 90, 93, 86, 88, 82),\n                 assists=c(33, 28, 31, 39, NA, 30))\n\n#view data frame\n<\/span>df\n\n  team points assists\n1 A 99 33\n2 A 90 28\n3 A 93 31\n4 B 86 39\n5 B 88 NA\n6 B 82 30\n<\/strong><\/pre>\n
 Przyk\u0142ad 1: Oblicz \u015bredni\u0105, korzystaj\u0105c z nazwy kolumny<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak obliczy\u0107 \u015bredni\u0105 z kolumny \u201epunkty\u201d przy u\u017cyciu nazwy kolumny:<\/span><\/p>\n
 #calculate mean of 'points' column\nmean(df$points)\n\n[1] 89.66667<\/span>\n<\/span><\/strong><\/pre>\n
 \u015arednia warto\u015b\u0107 w kolumnie \u201epunkty\u201d wynosi 89,66667<\/strong> .<\/span><\/p>\n
 Przyk\u0142ad 2: Oblicz \u015bredni\u0105 przy u\u017cyciu nazwy kolumny (zignoruj braki danych)<\/strong><\/span><\/h3>\n
 Je\u015bli spr\u00f3bujemy obliczy\u0107 \u015bredni\u0105 z kolumny zawieraj\u0105cej brakuj\u0105ce warto\u015bci, otrzymamy NA<\/strong> :<\/span><\/p>\n
 #attempt to calculate mean of 'assists' column\nmean(df$assists)\n\n[1] NA<\/span>\n<\/span><\/strong><\/pre>\n
 Musimy u\u017cy\u0107 na.rm=TRUE<\/strong> , aby zignorowa\u0107 brakuj\u0105ce warto\u015bci podczas obliczania \u015bredniej kolumny:<\/span><\/span><\/p>\n
 #calculate mean of 'assists' column and ignore missing values\nmean(df$assists, na. rm<\/span> = TRUE<\/span> )\n\n[1] 32.2<\/span><\/span><\/strong><\/pre>\n
 \u015arednia warto\u015b\u0107 w kolumnie \u201easysty\u201d to 32,2<\/strong> .<\/span><\/p>\n
 Przyk\u0142ad 3: Oblicz \u015bredni\u0105, korzystaj\u0105c z pozycji kolumny<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak obliczy\u0107 \u015bredni\u0105 kolumn\u0119 na pozycji indeksu 2:<\/span><\/p>\n
 #calculate mean of column in index position 2\nmean(df[, 2])\n\n[1] 89.66667<\/span>\n<\/span><\/strong><\/pre>\n
 \u015arednia warto\u015b\u0107 kolumny na pozycji indeksu 2 (kolumna \u201epunkty\u201d) wynosi 89,66667<\/strong> .<\/span><\/p>\n
 Przyk\u0142ad 4: Oblicz \u015bredni\u0105 ze wszystkich kolumn liczbowych<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak obliczy\u0107 \u015bredni\u0105 ze wszystkich kolumn liczbowych w ramce danych:<\/span><\/p>\n
 #calculate mean of all numeric columns\ncolMeans(df[sapply(df, is. numeric<\/span> )], na. rm<\/span> = TRUE<\/span> )\n\n  assist points \n89.66667 32.20000<\/span>\n<\/span><\/strong><\/pre>\n
 Dane wyj\u015bciowe wy\u015bwietlaj\u0105 \u015bredni\u0105 warto\u015b\u0107 ka\u017cdej kolumny liczbowej w ramce danych.<\/span><\/span><\/p>\n
 Dodatkowe zasoby<\/strong><\/span><\/h3>\n
 Poni\u017csze tutoriale wyja\u015bniaj\u0105, jak obliczy\u0107 inne warto\u015bci \u015brednie w R:<\/span><\/p>\n
 Jak obliczy\u0107 \u015bredni\u0105 obci\u0119t\u0105 w R<\/a>
 Jak obliczy\u0107 \u015bredni\u0105 geometryczn\u0105 w R<\/a>
 Jak obliczy\u0107 \u015bredni\u0105 wa\u017con\u0105 w R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Do obliczenia \u015bredniej kolumny w R mo\u017cna u\u017cy\u0107 dowolnej z nast\u0119puj\u0105cych metod: #calculate mean using column name mean(df$my_column) #calculate mean using column name (ignore missing values) mean(df$my_column, na. rm = TRUE ) #calculate mean using column position mean(df[, 1]) #calculation mean of all numeric columns colMeans(df[sapply(df, is. numeric )]) Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 ka\u017cdej […]<\/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-3054","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nJak obliczy\u0107 \u015bredni\u0105 kolumny w R (z przyk\u0142adami) - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak obliczy\u0107 \u015bredni\u0105 kolumny w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak obliczy\u0107 \u015bredni\u0105 kolumny w R (z przyk\u0142adami) - Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak obliczy\u0107 \u015bredni\u0105 kolumny w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-19T10:33:55+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/\",\"url\":\"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/\",\"name\":\"Jak obliczy\u0107 \u015bredni\u0105 kolumny w R (z przyk\u0142adami) - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-19T10:33:55+00:00\",\"dateModified\":\"2023-07-19T10:33:55+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak obliczy\u0107 \u015bredni\u0105 kolumny w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/srednia-w-kolumnie-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak obliczy\u0107 \u015bredni\u0105 kolumny w r (z przyk\u0142adami)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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