{"id":3683,"date":"2023-07-16T04:03:55","date_gmt":"2023-07-16T04:03:55","guid":{"rendered":"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/"},"modified":"2023-07-16T04:03:55","modified_gmt":"2023-07-16T04:03:55","slug":"r-selecteer-rijen-met-na","status":"publish","type":"post","link":"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/","title":{"rendered":"Hoe rijen met na-waarden in r te selecteren"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">U kunt de volgende methoden gebruiken om rijen met NA-waarden in R te selecteren:<\/span><\/p>\n<p> <strong><span style=\"color: #000000;\">Methode 1: Selecteer rijen met NA-waarden in elke kolom<\/span><\/strong><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df[ <span style=\"color: #800080;\">!<\/span> complete. <span style=\"color: #3366ff;\">boxes<\/span> (df), ]\n<\/strong><\/pre>\n<p> <strong><span style=\"color: #000000;\">Methode 2: Selecteer rijen met NA-waarden in een specifieke kolom<\/span><\/strong><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df[is. <span style=\"color: #3366ff;\">na<\/span> (df$my_column), ]<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">De volgende voorbeelden laten zien hoe u elke methode kunt gebruiken met het volgende dataframe in R:<\/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> (points=c(4, NA, 10, 14, 15, NA, 20, 22),\n                 rebounds=c(NA, 3, 3, 7, 6, 8, 14, 10),\n                 assists=c(NA, 9, 4, 4, 3, 7, 10, 11))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  points rebound assists\n1 4 NA NA\n2 NA 3 9\n3 10 3 4\n4 14 7 4\n5 15 6 3\n6 NA 8 7\n7 20 14 10\n8 22 10 11<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Voorbeeld 1: Selecteer rijen met NA-waarden in een willekeurige kolom<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">De volgende code laat zien hoe u rijen met NA-waarden selecteert in elke kolom van het dataframe in R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select rows with NA values in any column\n<\/span>na_rows &lt;- df[!complete. <span style=\"color: #3366ff;\">boxes<\/span> (df), ]\n\n<span style=\"color: #008080;\">#view results\n<\/span>na_rows\n\n  points rebound assists\n1 4 NA NA\n2 NA 3 9\n6 NA 8 7\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Houd er rekening mee dat rijen met NA-waarden in elke kolom worden geselecteerd.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Voorbeeld 2: Selecteer rijen met NA-waarden in een specifieke kolom<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">De volgende code laat zien hoe u rijen met NA-waarden selecteert in een specifieke kolom van het dataframe in R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select rows with NA values in the points column\n<\/span>na_rows &lt;- df[is. <span style=\"color: #3366ff;\">na<\/span> (df$points), ]\n\n<span style=\"color: #008080;\">#view results\n<\/span>na_rows\n\n  points rebound assists\n2 NA 3 9\n6 NA 8 7\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Houd er rekening mee dat alleen rijen met NA-waarden in de <strong>puntenkolom<\/strong> worden geselecteerd.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Aanvullende bronnen<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">In de volgende tutorials wordt uitgelegd hoe u andere veelvoorkomende taken in R kunt uitvoeren:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/nl\/complete-r-gevallen\/\" target=\"_blank\" rel=\"noopener\">Hoe complete.cases te gebruiken in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/nl\/na-weglaten-in-r\/\" target=\"_blank\" rel=\"noopener\">Hoe na.omit te gebruiken in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/nl\/verwijder-lege-regels-in-r\/\" target=\"_blank\" rel=\"noopener\">Hoe lege regels uit het dataframe in R te verwijderen<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>U kunt de volgende methoden gebruiken om rijen met NA-waarden in R te selecteren: Methode 1: Selecteer rijen met NA-waarden in elke kolom df[ ! complete. boxes (df), ] Methode 2: Selecteer rijen met NA-waarden in een specifieke kolom df[is. na (df$my_column), ] De volgende voorbeelden laten zien hoe u elke methode kunt gebruiken met [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-3683","post","type-post","status-publish","format-standard","hentry","category-gids"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hoe rijen met NA-waarden in R - Statorials te selecteren<\/title>\n<meta name=\"description\" content=\"In deze tutorial wordt uitgelegd hoe u rijen met NA-waarden in een dataframe in R selecteert, met verschillende voorbeelden.\" \/>\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\/nl\/r-selecteer-rijen-met-na\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hoe rijen met NA-waarden in R - Statorials te selecteren\" \/>\n<meta property=\"og:description\" content=\"In deze tutorial wordt uitgelegd hoe u rijen met NA-waarden in een dataframe in R selecteert, met verschillende voorbeelden.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-16T04:03:55+00:00\" \/>\n<meta name=\"author\" content=\"Dr.benjamin anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr.benjamin anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u00a0Minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/\",\"url\":\"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/\",\"name\":\"Hoe rijen met NA-waarden in R - Statorials te selecteren\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/nl\/#website\"},\"datePublished\":\"2023-07-16T04:03:55+00:00\",\"dateModified\":\"2023-07-16T04:03:55+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/d4b8842173cca1bb62cdec41860e4219\"},\"description\":\"In deze tutorial wordt uitgelegd hoe u rijen met NA-waarden in een dataframe in R selecteert, met verschillende voorbeelden.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/nl\/r-selecteer-rijen-met-na\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Thuis\",\"item\":\"https:\/\/statorials.org\/nl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Hoe rijen met na-waarden in r te selecteren\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/nl\/#website\",\"url\":\"https:\/\/statorials.org\/nl\/\",\"name\":\"Statorials\",\"description\":\"Uw gids voor statistische competentie\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/nl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"de\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/d4b8842173cca1bb62cdec41860e4219\",\"name\":\"Dr.benjamin anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/image\/\",\"url\":\"http:\/\/statorials.org\/nl\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"http:\/\/statorials.org\/nl\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Dr.benjamin anderson\"},\"description\":\"Ik ben Benjamin, een gepensioneerde hoogleraar statistiek die nu een toegewijde Statorials-lesgever is. 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