{"id":2216,"date":"2023-07-23T05:20:54","date_gmt":"2023-07-23T05:20:54","guid":{"rendered":"https:\/\/statorials.org\/pl\/r-znajdz-brakujace-wartosci\/"},"modified":"2023-07-23T05:20:54","modified_gmt":"2023-07-23T05:20:54","slug":"r-znajdz-brakujace-wartosci","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/r-znajdz-brakujace-wartosci\/","title":{"rendered":"Jak znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w r (z przyk\u0142adami)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Aby znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w R, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Metoda 1: Znajd\u017a lokalizacj\u0119 brakuj\u0105cych warto\u015bci<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>which( <span style=\"color: #3366ff;\">is.na<\/span> (df$column_name))\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 2: Policz wszystkie brakuj\u0105ce warto\u015bci<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum( <span style=\"color: #3366ff;\">is.na<\/span> (df$column_name))<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak wykorzysta\u0107 te funkcje w praktyce.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Znajd\u017a i zlicz brakuj\u0105ce warto\u015bci w kolumnie<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'B', 'C', NA, 'E'),\n                 points=c(99, 90, 86, 88, 95),\n                 assists=c(NA, 28, NA, NA, 34),\n                 rebounds=c(30, 28, 24, 24, NA))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  team points assists rebounds\n1 A 99 NA 30\n2 B 90 28 28\n3 C 86 NA 24\n4 NA 88 NA 24\n5 E 95 34 NA\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 poni\u017cszego kodu, aby zidentyfikowa\u0107 pozycje, kt\u00f3re maj\u0105 braki danych w kolumnie \u201epomoc\u201d i znale\u017a\u0107 \u0142\u0105czn\u0105 liczb\u0119 brakuj\u0105cych warto\u015bci w kolumnie \u201epomoc\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#identify locations of missing values in 'assists' column\n<span style=\"color: #000000;\">which( <span style=\"color: #3366ff;\">is.na<\/span> (df$assists))\n\n[1] 1 3 4\n\n<span style=\"color: #008080;\">#count total missing values in 'assists' column\n<\/span>sum( <span style=\"color: #3366ff;\">is.na<\/span> (df$assists))\n\n[1] 3 \n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku widzimy, \u017ce w pozycjach <strong>1<\/strong> , <strong>3<\/strong> i <strong>4<\/strong> brakuje warto\u015bci w kolumnie \u201easysty\u201d, a w kolumnie znajduj\u0105 si\u0119 \u0142\u0105cznie <strong>3<\/strong> brakuj\u0105ce warto\u015bci.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Policz brakuj\u0105ce warto\u015bci we wszystkich kolumnach<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 ca\u0142kowite braki danych w ka\u017cdej kolumnie ramki danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'B', 'C', NA, 'E'),\n                 points=c(99, 90, 86, 88, 95),\n                 assists=c(NA, 28, NA, NA, 34),\n                 rebounds=c(30, 28, 24, 24, NA))\n\n<span style=\"color: #008080;\">#count total missing values in each column of data frame\n<\/span>sapply(df, <span style=\"color: #008000;\">function<\/span> (x) sum(is. <span style=\"color: #3366ff;\">na<\/span> (x)))\n\n    team points assists rebounds \n       1 0 3 1<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku mo\u017cemy zobaczy\u0107:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">W kolumnie \u201ezesp\u00f3\u0142\u201d brakuje <strong>1<\/strong> warto\u015bci.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Kolumna \u201epunkty\u201d zawiera <strong>0<\/strong> brakuj\u0105cych warto\u015bci.<\/span><\/li>\n<li> <span style=\"color: #000000;\">W kolumnie \u201epomoc\u201d znajduj\u0105 si\u0119 <strong>3<\/strong> brakuj\u0105ce warto\u015bci.<\/span><\/li>\n<li> <span style=\"color: #000000;\">W kolumnie \u201eodbicia\u201d brakuje <strong>1<\/strong> warto\u015bci.<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: Zlicz brakuj\u0105ce warto\u015bci w ca\u0142ej ramce danych<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 ca\u0142kowite braki danych w ca\u0142ej ramce danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'B', 'C', NA, 'E'),\n                 points=c(99, 90, 86, 88, 95),\n                 assists=c(NA, 28, NA, NA, 34),\n                 rebounds=c(30, 28, 24, 24, NA))\n\n<span style=\"color: #008080;\">#count total missing values in entire data frame\n<\/span>sum( <span style=\"color: #3366ff;\">is.na<\/span> (df))\n\n[1] 5<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku widzimy, \u017ce w ca\u0142ej ramce danych brakuje \u0142\u0105cznie <strong>5<\/strong> warto\u015bci.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykona\u0107 inne typowe operacje na brakuj\u0105cych warto\u015bciach w R:<\/span><\/p>\n<p><a href=\"https:\/\/statorials.org\/pl\/przypisz-brakujace-wartosci-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak wszystkim przypisa\u0107 brakuj\u0105ce warto\u015bci w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/zamien-na-na-ciag-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak zamieni\u0107 NA na ci\u0105gi w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/dplyr-zamien-na-na-zero\/\" target=\"_blank\" rel=\"noopener\">Jak zamieni\u0107 NA na Zero w dplyr<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aby znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w R, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod: Metoda 1: Znajd\u017a lokalizacj\u0119 brakuj\u0105cych warto\u015bci which( is.na (df$column_name)) Metoda 2: Policz wszystkie brakuj\u0105ce warto\u015bci sum( is.na (df$column_name)) Poni\u017csze przyk\u0142ady pokazuj\u0105, jak wykorzysta\u0107 te funkcje w praktyce. Przyk\u0142ad 1: Znajd\u017a i zlicz brakuj\u0105ce warto\u015bci w kolumnie Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych: #create [&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-2216","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 znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w R (z przyk\u0142adami) \u2013 Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w 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\/r-znajdz-brakujace-wartosci\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w R (z przyk\u0142adami) \u2013 Statologia\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/r-znajdz-brakujace-wartosci\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-23T05:20:54+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-znajdz-brakujace-wartosci\/\",\"url\":\"https:\/\/statorials.org\/pl\/r-znajdz-brakujace-wartosci\/\",\"name\":\"Jak znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w R (z przyk\u0142adami) \u2013 Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-23T05:20:54+00:00\",\"dateModified\":\"2023-07-23T05:20:54+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci w R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/r-znajdz-brakujace-wartosci\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/r-znajdz-brakujace-wartosci\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/r-znajdz-brakujace-wartosci\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak znale\u017a\u0107 i policzy\u0107 brakuj\u0105ce warto\u015bci 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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