{"id":11868,"date":"2022-09-28T20:07:06","date_gmt":"2022-09-28T14:37:06","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/"},"modified":"2022-09-28T20:07:06","modified_gmt":"2022-09-28T14:37:06","slug":"solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/","title":{"rendered":"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

\n
\n
<\/div>\n
\n
\n

We may use either of the following:<\/p>\n

do.call(function (...) paste(..., sep = \"-\"), rld[groups])\ndo.call(paste, c(rld[groups], sep = \"-\"))\n<\/code><\/pre>\n
We can consider a small, reproducible example:<\/p>\n
rld <- mtcars[1:5, ]\ngroups <- names(mtcars)[c(1,3,5,6,8)]\ndo.call(paste, c(rld[groups], sep = \"-\"))\n#[1] \"21-160-3.9-2.62-0\"     \"21-160-3.9-2.875-0\"    \"22.8-108-3.85-2.32-1\" \n#[4] \"21.4-258-3.08-3.215-1\" \"18.7-360-3.15-3.44-0\"\n<\/code><\/pre>\n
Note, it is your responsibility to ensure all(groups %in% names(rld))<\/code> is TRUE<\/code>, otherwise you get “subscript out of bound” or “undefined column selected” error.<\/p>\n
\n
(I am copying your comment as a follow-up)<\/em><\/p>\n
It seems the methods you propose don’t work directly on my object. However, the package I’m using provides a colData<\/code> function that makes something more similar to a data.frame<\/code>:<\/p>\n
> class(colData(rld))\n[1] \"DataFrame\"\nattr(,\"package\")\n[1] \"S4Vectors\"\n<\/code><\/pre>\n
do.call(function (...) paste(..., sep = \"-\"), colData(rld)[groups])<\/code> works, but do.call(paste, c(colData(rld)[groups], sep = \"-\"))<\/code> fails with an error message I fail to understand (as too often with R…):<\/p>\n
> do.call(paste, c(colData(rld)[groups], sep = \"-\"))\nError in (function (classes, fdef, mtable)  : \n  unable to find an inherited method for function \u2018mcols\u2019 for signature \u2018\"character\"\u2019\n<\/code><\/pre>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            3<\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved Extract and paste together multiple columns of a data frame like object using a vector of column names <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] We may use either of the following: do.call(function (…) paste(…, sep = “-“), rld[groups]) do.call(paste, c(rld[groups], sep = “-“)) We can consider a small, reproducible example: rld <- mtcars[1:5, ] groups <- names(mtcars)[c(1,3,5,6,8)] do.call(paste, c(rld[groups], sep = “-“)) #[1] “21-160-3.9-2.62-0” “21-160-3.9-2.875-0” “22.8-108-3.85-2.32-1” #[4] “21.4-258-3.08-3.215-1” “18.7-360-3.15-3.44-0” Note, it is your responsibility to ensure all(groups %in% … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[969,1910,321],"class_list":["post-11868","post","type-post","status-publish","format-standard","hentry","category-solved","tag-bioinformatics","tag-package","tag-r"],"yoast_head":"\n[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] We may use either of the following: do.call(function (...) paste(..., sep = "-"), rld[groups]) do.call(paste, c(rld[groups], sep = "-")) We can consider a small, reproducible example: rld <- mtcars[1:5, ] groups <- names(mtcars)[c(1,3,5,6,8)] do.call(paste, c(rld[groups], sep = "-")) #[1] "21-160-3.9-2.62-0" "21-160-3.9-2.875-0" "22.8-108-3.85-2.32-1" #[4] "21.4-258-3.08-3.215-1" "18.7-360-3.15-3.44-0" Note, it is your responsibility to ensure all(groups %in% ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-28T14:37:06+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names\",\"datePublished\":\"2022-09-28T14:37:06+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/\"},\"wordCount\":127,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"bioinformatics\",\"package\",\"r\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/\",\"name\":\"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-09-28T14:37:06+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/jassweb.com\/solved\/#website\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"name\":\"JassWeb\",\"description\":\"Build High-quality Websites\",\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/jassweb.com\/solved\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\",\"name\":\"Jass Web\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"contentUrl\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"width\":693,\"height\":132,\"caption\":\"Jass Web\"},\"image\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\",\"name\":\"Kirat\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775193939\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775193939\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names - JassWeb","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names - JassWeb","og_description":"[ad_1] We may use either of the following: do.call(function (...) paste(..., sep = \"-\"), rld[groups]) do.call(paste, c(rld[groups], sep = \"-\")) We can consider a small, reproducible example: rld <- mtcars[1:5, ] groups <- names(mtcars)[c(1,3,5,6,8)] do.call(paste, c(rld[groups], sep = \"-\")) #[1] \"21-160-3.9-2.62-0\" \"21-160-3.9-2.875-0\" \"22.8-108-3.85-2.32-1\" #[4] \"21.4-258-3.08-3.215-1\" \"18.7-360-3.15-3.44-0\" Note, it is your responsibility to ensure all(groups %in% ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/","og_site_name":"JassWeb","article_published_time":"2022-09-28T14:37:06+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names","datePublished":"2022-09-28T14:37:06+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/"},"wordCount":127,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["bioinformatics","package","r"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/","url":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/","name":"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-09-28T14:37:06+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-extract-and-paste-together-multiple-columns-of-a-data-frame-like-object-using-a-vector-of-column-names\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] Extract and paste together multiple columns of a data frame like object using a vector of column names"}]},{"@type":"WebSite","@id":"https:\/\/jassweb.com\/solved\/#website","url":"https:\/\/jassweb.com\/solved\/","name":"JassWeb","description":"Build High-quality Websites","publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/jassweb.com\/solved\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/jassweb.com\/solved\/#organization","name":"Jass Web","url":"https:\/\/jassweb.com\/solved\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/","url":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","contentUrl":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","width":693,"height":132,"caption":"Jass Web"},"image":{"@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31","name":"Kirat","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/","url":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775193939","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775193939","caption":"Kirat"},"sameAs":["http:\/\/jassweb.com"],"url":"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/11868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=11868"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/11868\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=11868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=11868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=11868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}