{"id":1140,"date":"2023-07-27T12:44:55","date_gmt":"2023-07-27T12:44:55","guid":{"rendered":"https:\/\/statorials.org\/pl\/xtabs-w-r\/"},"modified":"2023-07-27T12:44:55","modified_gmt":"2023-07-27T12:44:55","slug":"xtabs-w-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/xtabs-w-r\/","title":{"rendered":"Jak u\u017cywa\u0107 xtabs() w r do obliczania cz\u0119stotliwo\u015bci"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Funkcja <strong>xtabs()<\/strong> w R pozwala szybko obliczy\u0107 cz\u0119sto\u015bci jednej lub wi\u0119kszej liczby zmiennych.<\/span><\/p>\n<p> <span style=\"color: #000000;\">U\u017cywa nast\u0119puj\u0105cej podstawowej sk\u0142adni:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>xtabs(~nazwa_zmiennej, dane=dane)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Z\u0142oto:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>nazwa_zmiennej:<\/strong> Zmienna, dla kt\u00f3rej chcesz obliczy\u0107 cz\u0119stotliwo\u015bci.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>dane:<\/strong> Nazwa bloku danych, z kt\u00f3rego pochodzi zmienna.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">W tym samouczku przedstawiono kilka przyk\u0142ad\u00f3w praktycznego wykorzystania tej funkcji.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: U\u017cyj xtabs() dla cz\u0119stotliwo\u015bci jednokierunkowych<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak u\u017cywa\u0107 <strong>funkcji xtabs()<\/strong> do obliczania cz\u0119stotliwo\u015bci dla zmiennej <em>zespo\u0142u<\/em> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data.frame(team= <span style=\"color: #3366ff;\">rep<\/span> (c(' <span style=\"color: #008000;\">A<\/span> ', ' <span style=\"color: #008000;\">B<\/span> ', ' <span style=\"color: #008000;\">C<\/span> '), <span style=\"color: #3366ff;\">times<\/span> =c(27, 33, 40)),\n                 position= <span style=\"color: #3366ff;\">rep<\/span> (c(' <span style=\"color: #008000;\">Guard<\/span> ', ' <span style=\"color: #008000;\">Forward<\/span> ', ' <span style=\"color: #008000;\">Center<\/span> '), <span style=\"color: #3366ff;\">times<\/span> =c(20, 50, 30)),\n                 points= <span style=\"color: #3366ff;\">runif<\/span> (100, 1, 50))\n\n<span style=\"color: #008080;\">#view first six rows of data frame\n<\/span>head(df)\n\n  team position points\n1A Guard 14.00992\n2 A Guard 19.23407\n3A Guard 29.06981\n4A Guard 45.50218\n5A Guard 10.88241\n6A Guard 45.02109\n\n<span style=\"color: #008080;\">#calculate frequencies of <em>team<\/em> variable\n<\/span>xtabs(~team, data=df)\n\nteam\n ABC\n27 33 40<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku mo\u017cemy zobaczy\u0107, \u017ce:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Zesp\u00f3\u0142 A pojawia si\u0119 <strong>27<\/strong> razy w ramce danych.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Zesp\u00f3\u0142 A pojawia si\u0119 <strong>33<\/strong> razy w ramce danych.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Zesp\u00f3\u0142 A pojawia si\u0119 <strong>40<\/strong> razy w ramce danych.<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: U\u017cyj xtabs() dla cz\u0119stotliwo\u015bci dwukierunkowych<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak u\u017cywa\u0107 <strong>funkcji xtabs()<\/strong> do obliczania cz\u0119stotliwo\u015bci dwukierunkowych dla zmiennych <em>zespo\u0142u<\/em> i <em>pozycji<\/em> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data.frame(team= <span style=\"color: #3366ff;\">rep<\/span> (c(' <span style=\"color: #008000;\">A<\/span> ', ' <span style=\"color: #008000;\">B<\/span> ', ' <span style=\"color: #008000;\">C<\/span> '), <span style=\"color: #3366ff;\">times<\/span> =c(27, 33, 40)),\n                 position= <span style=\"color: #3366ff;\">rep<\/span> (c(' <span style=\"color: #008000;\">Guard<\/span> ', ' <span style=\"color: #008000;\">Forward<\/span> ', ' <span style=\"color: #008000;\">Center<\/span> '), <span style=\"color: #3366ff;\">times<\/span> =c(20, 50, 30)),\n                 points= <span style=\"color: #3366ff;\">runif<\/span> (100, 1, 50))\n\n<span style=\"color: #008080;\">#calculate frequencies of <em>team<\/em> and <em>position<\/em> variables\n<\/span>xtabs(~team+position, data=df)\n\n    position\nteam Center Forward Guard\n   A 0 7 20\n   B 0 33 0\n   C 30 10 0<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku mo\u017cemy zobaczy\u0107, \u017ce:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">W dru\u017cynie A jest <strong>0<\/strong> \u015brodkowych.<\/span><\/li>\n<li> <span style=\"color: #000000;\">W dru\u017cynie A jest <strong>7<\/strong> atakuj\u0105cych.<\/span><\/li>\n<li> <span style=\"color: #000000;\">W dru\u017cynie A jest <strong>20<\/strong> stra\u017cnik\u00f3w.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">I tak dalej.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>U\u017cywanie xtabs() dla cz\u0119stotliwo\u015bci n-kierunkowych<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Funkcji <strong>xtabs()<\/strong> mo\u017cna w rzeczywisto\u015bci u\u017cy\u0107 do obliczenia cz\u0119stotliwo\u015bci dowolnej liczby zmiennych, po prostu u\u017cywaj\u0105c nast\u0119puj\u0105cej sk\u0142adni:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>xtabs(~variable1+variable2+variable3+...+variable <em>n<\/em> , data=df)<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">W praktyce funkcja ta jest najcz\u0119\u015bciej wykorzystywana do obliczania cz\u0119stotliwo\u015bci jednokierunkowych i dwukierunkowych.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pl\/dplyr-czestotliwosci-wzgledne\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak obliczy\u0107 cz\u0119stotliwo\u015bci wzgl\u0119dne za pomoc\u0105 dplyr<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/policz,-jesli-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak uruchomi\u0107 funkcj\u0119 COUNTIF w R<\/a><br \/><a href=\"https:\/\/statorials.org\/pl\/suma-skumulowana-w-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak obliczy\u0107 sumy skumulowane w R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Funkcja xtabs() w R pozwala szybko obliczy\u0107 cz\u0119sto\u015bci jednej lub wi\u0119kszej liczby zmiennych. U\u017cywa nast\u0119puj\u0105cej podstawowej sk\u0142adni: xtabs(~nazwa_zmiennej, dane=dane) Z\u0142oto: nazwa_zmiennej: Zmienna, dla kt\u00f3rej chcesz obliczy\u0107 cz\u0119stotliwo\u015bci. dane: Nazwa bloku danych, z kt\u00f3rego pochodzi zmienna. W tym samouczku przedstawiono kilka przyk\u0142ad\u00f3w praktycznego wykorzystania tej funkcji. Przyk\u0142ad 1: U\u017cyj xtabs() dla cz\u0119stotliwo\u015bci jednokierunkowych Poni\u017cszy kod pokazuje, [&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-1140","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 u\u017cywa\u0107 xtabs() w R do obliczania cz\u0119stotliwo\u015bci \u2013 Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji xtabs() w R do obliczania cz\u0119stotliwo\u015bci, 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\/xtabs-w-r\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak u\u017cywa\u0107 xtabs() w R do obliczania cz\u0119stotliwo\u015bci \u2013 Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji xtabs() w R do obliczania cz\u0119stotliwo\u015bci, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/xtabs-w-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T12:44:55+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\/xtabs-w-r\/\",\"url\":\"https:\/\/statorials.org\/pl\/xtabs-w-r\/\",\"name\":\"Jak u\u017cywa\u0107 xtabs() w R do obliczania cz\u0119stotliwo\u015bci \u2013 Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-27T12:44:55+00:00\",\"dateModified\":\"2023-07-27T12:44:55+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji xtabs() w R do obliczania cz\u0119stotliwo\u015bci, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/xtabs-w-r\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/xtabs-w-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/xtabs-w-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak u\u017cywa\u0107 xtabs() w r do obliczania cz\u0119stotliwo\u015bci\"}]},{\"@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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