{"id":6165,"date":"2022-09-01T21:34:07","date_gmt":"2022-09-01T16:04:07","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/"},"modified":"2022-09-01T21:34:07","modified_gmt":"2022-09-01T16:04:07","slug":"solved-transforming-numerical-variables-in-a-dataframe-with-a-function","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/","title":{"rendered":"[Solved] Transforming numerical variables in a dataframe with a function"},"content":{"rendered":"

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

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

You may do:<\/p>\n

# data\n head(iris)\n  Sepal.Length Sepal.Width Petal.Length Petal.Width Species\n1          5.1         3.5          1.4         0.2  setosa\n2          4.9         3.0          1.4         0.2  setosa\n3          4.7         3.2          1.3         0.2  setosa\n4          4.6         3.1          1.5         0.2  setosa\n5          5.0         3.6          1.4         0.2  setosa\n6          5.4         3.9          1.7         0.4  setosa\n<\/code><\/pre>\n
the function<\/p>\n
foo_divide <- function(x, y){\n  foo <- function(x) if(is.numeric(x)) x\/1000 else x # function to divide numeric columns by 1000\n  if(missing(y)) y <- 1:ncol(x) # set y if missing\n  x[, y] <-  lapply(x[, y], foo)\n  as.data.frame(x) # return\n}\n<\/code><\/pre>\n
no listofvars <\/p>\n
head(foo_divide(iris))\n  Sepal.Length Sepal.Width Petal.Length Petal.Width Species\n1       0.0051      0.0035       0.0014       2e-04  setosa\n2       0.0049      0.0030       0.0014       2e-04  setosa\n3       0.0047      0.0032       0.0013       2e-04  setosa\n4       0.0046      0.0031       0.0015       2e-04  setosa\n5       0.0050      0.0036       0.0014       2e-04  setosa\n6       0.0054      0.0039       0.0017       4e-04  setosa\n<\/code><\/pre>\n
plus listofvars<\/p>\n
 head(foo_divide(iris, c(\"Petal.Length\", \"Petal.Width\", \"Species\")))\n   Sepal.Length Sepal.Width Petal.Length Petal.Width Species\n1          5.1         3.5       0.0014       2e-04  setosa\n2          4.9         3.0       0.0014       2e-04  setosa\n3          4.7         3.2       0.0013       2e-04  setosa\n4          4.6         3.1       0.0015       2e-04  setosa\n5          5.0         3.6       0.0014       2e-04  setosa\n6          5.4         3.9       0.0017       4e-04  setosa\n<\/code><\/pre>\n
You can also use a numeric vector to specify the columns<\/p>\n
foo_divide(iris, 1:3)\n<\/code><\/pre>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            <\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved Transforming numerical variables in a dataframe with a function <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] You may do: # data head(iris) Sepal.Length Sepal.Width Petal.Length Petal.Width Species 1 5.1 3.5 1.4 0.2 setosa 2 4.9 3.0 1.4 0.2 setosa 3 4.7 3.2 1.3 0.2 setosa 4 4.6 3.1 1.5 0.2 setosa 5 5.0 3.6 1.4 0.2 setosa 6 5.4 3.9 1.7 0.4 setosa the function foo_divide <- function(x, y){ foo … 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":[321],"class_list":["post-6165","post","type-post","status-publish","format-standard","hentry","category-solved","tag-r"],"yoast_head":"\n[Solved] Transforming numerical variables in a dataframe with a function - 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-transforming-numerical-variables-in-a-dataframe-with-a-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Transforming numerical variables in a dataframe with a function - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You may do: # data head(iris) Sepal.Length Sepal.Width Petal.Length Petal.Width Species 1 5.1 3.5 1.4 0.2 setosa 2 4.9 3.0 1.4 0.2 setosa 3 4.7 3.2 1.3 0.2 setosa 4 4.6 3.1 1.5 0.2 setosa 5 5.0 3.6 1.4 0.2 setosa 6 5.4 3.9 1.7 0.4 setosa the function foo_divide <- function(x, y){ foo ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-01T16:04:07+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-transforming-numerical-variables-in-a-dataframe-with-a-function\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] Transforming numerical variables in a dataframe with a function\",\"datePublished\":\"2022-09-01T16:04:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/\"},\"wordCount\":42,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"r\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/\",\"name\":\"[Solved] Transforming numerical variables in a dataframe with a function - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-09-01T16:04:07+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] Transforming numerical variables in a dataframe with a function\"}]},{\"@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=1776403586\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] Transforming numerical variables in a dataframe with a function - 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-transforming-numerical-variables-in-a-dataframe-with-a-function\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] Transforming numerical variables in a dataframe with a function - JassWeb","og_description":"[ad_1] You may do: # data head(iris) Sepal.Length Sepal.Width Petal.Length Petal.Width Species 1 5.1 3.5 1.4 0.2 setosa 2 4.9 3.0 1.4 0.2 setosa 3 4.7 3.2 1.3 0.2 setosa 4 4.6 3.1 1.5 0.2 setosa 5 5.0 3.6 1.4 0.2 setosa 6 5.4 3.9 1.7 0.4 setosa the function foo_divide <- function(x, y){ foo ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/","og_site_name":"JassWeb","article_published_time":"2022-09-01T16:04:07+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-transforming-numerical-variables-in-a-dataframe-with-a-function\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] Transforming numerical variables in a dataframe with a function","datePublished":"2022-09-01T16:04:07+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/"},"wordCount":42,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["r"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/","url":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/","name":"[Solved] Transforming numerical variables in a dataframe with a function - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-09-01T16:04:07+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-transforming-numerical-variables-in-a-dataframe-with-a-function\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] Transforming numerical variables in a dataframe with a function"}]},{"@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=1776403586","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586","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\/6165","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=6165"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/6165\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=6165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=6165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=6165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}