{"id":1859,"date":"2023-07-24T17:06:16","date_gmt":"2023-07-24T17:06:16","guid":{"rendered":"https:\/\/statorials.org\/pl\/r-zlicz-liczbe-wystapien-w-kolumnie\/"},"modified":"2023-07-24T17:06:16","modified_gmt":"2023-07-24T17:06:16","slug":"r-zlicz-liczbe-wystapien-w-kolumnie","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/r-zlicz-liczbe-wystapien-w-kolumnie\/","title":{"rendered":"Jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 w kolumnach w r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni w R, aby policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 okre\u015blonych warto\u015bci w kolumnach ramki danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count number of occurrences of each value in column<\/span>\ntable(df$column_name)\n\n<span style=\"color: #008080;\">#count number of occurrences of each value (including NA values) in column\n<\/span>table(df$column_name, useNA = ' <span style=\"color: #ff0000;\">always<\/span> ')\n\n<span style=\"color: #008080;\">#count number of occurrences of specific value<\/span>\nlength(which(df$column_name== <span style=\"color: #008000;\">value<\/span> ))\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak zastosowa\u0107 t\u0119 sk\u0142adni\u0119 w praktyce z nast\u0119puj\u0105c\u0105 ramk\u0105 danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (player=c('A', 'B', 'C', 'D', 'E', 'F'),\n                 team=c('Mavs', 'Mavs', 'Suns', 'Nets', 'Nets', 'Nets'),\n                 points=c(20, 22, 26, 30, 30, NA))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  player team points\n1 A Mavs 20\n2 B Mavs 22\n3 C Suns 26\n4 D Nets 30\n5 E Nets 30\n6 F Nets NA\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Zlicz wyst\u0105pienia warto\u015bci w kolumnie<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 ka\u017cdej warto\u015bci w kolumnie \u201ezesp\u00f3\u0142\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count number of occurrences of each team<\/span>\ntable(df$team)\n\nMavs Nets Suns \n   2 3 1 \n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To nam m\u00f3wi:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Nazwa zespo\u0142u \u201eMavs\u201d pojawia si\u0119 2 razy.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Nazwa zespo\u0142u \u201eNets\u201d pojawia si\u0119 3 razy.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Nazwa zespo\u0142u \u201eSuns\u201d pojawia si\u0119 1 raz.<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Zliczanie wyst\u0105pie\u0144 warto\u015bci w kolumnie (w tym warto\u015bci NA)<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 ka\u017cdej warto\u015bci (w tym warto\u015bci NA) w kolumnie \u201epunkty\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count number of occurrences of each value in 'points', including NA occurrences<\/span>\ntable(df$points, useNA = ' <span style=\"color: #ff0000;\">always<\/span> ')\n\n  20 22 26 30 &lt;NA&gt;\n   1 1 1 2 1<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To nam m\u00f3wi:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 20 pojawia si\u0119 1 raz.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 22 pojawia si\u0119 1 raz.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 26 pojawia si\u0119 1 raz.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 30 pojawia si\u0119 dwukrotnie.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 NA (brakuj\u0105ca warto\u015b\u0107) pojawia si\u0119 1 raz.<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: Zliczanie wyst\u0105pie\u0144 okre\u015blonej warto\u015bci w kolumnie<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje jak policzy\u0107 ilo\u015b\u0107 wyst\u0105pie\u0144 warto\u015bci 30 w kolumnie \u201epunkty\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count number of occurrences of the value 30 in 'points' column<\/span>\nlength(which(df$points == <span style=\"color: #008000;\">30<\/span> ))\n\n[1] 2<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Oznacza to, \u017ce warto\u015b\u0107 30 pojawia si\u0119 dwukrotnie w kolumnie \u201epunkty\u201d.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cesz tak\u017ce u\u017cy\u0107 poni\u017cszej sk\u0142adni, aby policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 kilku r\u00f3\u017cnych warto\u015bci w kolumnie \u201epunkty\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count number of occurrences of the value 30 or 26 in 'points' column<\/span>\nlength(which(df$points == <span style=\"color: #008000;\">30 <span style=\"color: #000000;\">| df$points ==<\/span> 26<\/span> ))\n\n[1] 3<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Oznacza to, \u017ce warto\u015b\u0107 30 lub 26 pojawia si\u0119 w sumie 3 razy w kolumnie \u201epunkty\u201d.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pl\/dodaj-okreslone-kolumny-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak sumowa\u0107 okre\u015blone kolumny w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/obliczyc-srednia-z-wielu-kolumn-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak obliczy\u0107 \u015bredni\u0105 z wielu kolumn w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/r-max-w-wielu-kolumnach\/\" target=\"_blank\" rel=\"noopener\">Jak znale\u017a\u0107 maksymaln\u0105 warto\u015b\u0107 w wielu kolumnach w R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni w R, aby policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 okre\u015blonych warto\u015bci w kolumnach ramki danych: #count number of occurrences of each value in column table(df$column_name) #count number of occurrences of each value (including NA values) in column table(df$column_name, useNA = &#8217; always &#8217;) #count number of occurrences of specific value length(which(df$column_name== value )) Poni\u017csze [&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-1859","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 w kolumnach w R<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 okre\u015blonych warto\u015bci w kolumnach ramki danych w R, \u0142\u0105cznie z przyk\u0142adami.\" \/>\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\/r-zlicz-liczbe-wystapien-w-kolumnie\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 w kolumnach w R\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 okre\u015blonych warto\u015bci w kolumnach ramki danych w R, \u0142\u0105cznie z przyk\u0142adami.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/r-zlicz-liczbe-wystapien-w-kolumnie\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-24T17:06:16+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\/r-zlicz-liczbe-wystapien-w-kolumnie\/\",\"url\":\"https:\/\/statorials.org\/pl\/r-zlicz-liczbe-wystapien-w-kolumnie\/\",\"name\":\"Jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 w kolumnach w R\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-24T17:06:16+00:00\",\"dateModified\":\"2023-07-24T17:06:16+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 okre\u015blonych warto\u015bci w kolumnach ramki danych w R, \u0142\u0105cznie z przyk\u0142adami.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/r-zlicz-liczbe-wystapien-w-kolumnie\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/r-zlicz-liczbe-wystapien-w-kolumnie\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/r-zlicz-liczbe-wystapien-w-kolumnie\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 w kolumnach w r\"}]},{\"@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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