{"id":1083,"date":"2023-07-27T17:40:43","date_gmt":"2023-07-27T17:40:43","guid":{"rendered":"https:\/\/statorials.org\/nl\/stapel-kolommen-in-r\/"},"modified":"2023-07-27T17:40:43","modified_gmt":"2023-07-27T17:40:43","slug":"stapel-kolommen-in-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/nl\/stapel-kolommen-in-r\/","title":{"rendered":"Dataframekolommen stapelen in r"},"content":{"rendered":"

<\/p>\n

\n

Vaak wilt u misschien twee of meer dataframekolommen stapelen in \u00e9\u00e9n enkele kolom in R.<\/span><\/p>\n

U kunt bijvoorbeeld hiermee beginnen:<\/span><\/p>\n

 person trial outcome1 outcome2\n     A 1 7 4\n     A 2 6 4\n     B 1 6 5\n     B 2 5 5\n     C 1 4 3\n     C 2 4 2\n<\/strong><\/pre>\n
 Daarom:<\/span><\/p>\n
 person trial outcomes value\n      A 1 outcome1 7\n      A 2 outcome1 6\n      B 1 outcome1 6\n      B 2 outcome1 5\n      C 1 outcome1 4\n      C 2 outcome1 4\n      A 1 outcome2 4\n      A 2 outcome2 4\n      B 1 outcome2 5\n      B 2 outcome2 5\n      C 1 outcome2 3\n      C 2 outcome2 2<\/strong><\/pre>\n
 In deze tutorial worden twee methoden uitgelegd die u hiervoor in R kunt gebruiken.<\/span><\/p>\n
 Methode 1: Gebruik de stapelfunctie in Base R<\/strong><\/span><\/h3>\n
 De volgende code laat zien hoe u kolommen kunt stapelen met behulp van de stapelfunctie<\/strong> in Base R:<\/span><\/p>\n
 #create original data frame\n<\/span>data <- data.frame(person=c('A', 'A', 'B', 'B', 'C', 'C'),\n                   trial=c(1, 2, 1, 2, 1, 2),\n                   outcome1=c(7, 6, 6, 5, 4, 4),\n                   outcome2=c(4, 4, 5, 5, 3, 2))\n\n#stack the third and fourth columns<\/span>\ncbind<\/span> (data[1:2], stack<\/span> (data[3:4]))\n\n   person trial values ind\n1 A 1 7 outcome1\n2 A 2 6 outcome1\n3 B 1 6 outcome1\n4 B 2 5 outcome1\n5 C 1 4 outcome1\n6 C 2 4 outcome1\n7 A 1 4 outcome2\n8 A 2 4 outcome2\n9 B 1 5 outcome2\n10 B 2 5 outcome2\n11 C 1 3 outcome2\n12 C 2 2 outcome2\n<\/strong><\/pre>\n
 Methode 2: Gebruik de smeltfunctie van Reshape2<\/strong><\/span><\/h3>\n
 De volgende code laat zien hoe u kolommen kunt stapelen met behulp van de melt-<\/strong> functie in de reshape2-<\/strong> bibliotheek:<\/span><\/p>\n
 #loadlibrary<\/span>\nlibrary(reshape2)\n\n#create original data frame\n<\/span>data <- data.frame(person=c('A', 'A', 'B', 'B', 'C', 'C'),\n                   trial=c(1, 2, 1, 2, 1, 2),\n                   outcome1=c(7, 6, 6, 5, 4, 4),\n                   outcome2=c(4, 4, 5, 5, 3, 2))\n\n#melt columns of data frame<\/span>\nmelt(data, id. var<\/span> = c(' person<\/span> ', ' trial<\/span> '), variable. name = ' outcomes<\/span> ')\n\n   person trial outcomes value\n1 A 1 outcome1 7\n2 A 2 outcome1 6\n3 B 1 outcome1 6\n4 B 2 outcome1 5\n5 C 1 outcome1 4\n6 C 2 outcome1 4\n7 A 1 outcome2 4\n8 A 2 outcome2 4\n9 B 1 outcome2 5\n10 B 2 outcome2 5\n11 C 1 outcome2 3\n12 C 2 outcome2 2\n<\/strong><\/pre>\n
 De volledige documentatie voor de merge-functie vindt u hier<\/a> .<\/em><\/span><\/p>\n
 Aanvullende bronnen<\/strong><\/span><\/h3>\n
 Hoe twee kolommen in R te veranderen<\/a>
 Hoe kolommen te hernoemen in R
 Hoe specifieke kolommen in R op te tellen<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Vaak wilt u misschien twee of meer dataframekolommen stapelen in \u00e9\u00e9n enkele kolom in R. U kunt bijvoorbeeld hiermee beginnen: person trial outcome1 outcome2 A 1 7 4 A 2 6 4 B 1 6 5 B 2 5 5 C 1 4 3 C 2 4 2 Daarom: person trial outcomes value A 1 […]<\/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-1083","post","type-post","status-publish","format-standard","hentry","category-gids"],"yoast_head":"\nDataframekolommen stapelen in R - Statorials<\/title>\n<meta name=\"description\" content=\"Een eenvoudige uitleg over het stapelen van dataframekolommen in R, inclusief 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\/stapel-kolommen-in-r\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dataframekolommen stapelen in R - Statorials\" \/>\n<meta property=\"og:description\" content=\"Een eenvoudige uitleg over het stapelen van dataframekolommen in R, inclusief verschillende voorbeelden.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/nl\/stapel-kolommen-in-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T17:40:43+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\/stapel-kolommen-in-r\/\",\"url\":\"https:\/\/statorials.org\/nl\/stapel-kolommen-in-r\/\",\"name\":\"Dataframekolommen stapelen in R - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/nl\/#website\"},\"datePublished\":\"2023-07-27T17:40:43+00:00\",\"dateModified\":\"2023-07-27T17:40:43+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/d4b8842173cca1bb62cdec41860e4219\"},\"description\":\"Een eenvoudige uitleg over het stapelen van dataframekolommen in R, inclusief verschillende voorbeelden.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/nl\/stapel-kolommen-in-r\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/nl\/stapel-kolommen-in-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/nl\/stapel-kolommen-in-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Thuis\",\"item\":\"https:\/\/statorials.org\/nl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Dataframekolommen stapelen in r\"}]},{\"@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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