{"id":2282,"date":"2023-07-22T22:58:19","date_gmt":"2023-07-22T22:58:19","guid":{"rendered":"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/"},"modified":"2023-07-22T22:58:19","modified_gmt":"2023-07-22T22:58:19","slug":"converter-uma-variavel-categorica-em-r-numerico","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/","title":{"rendered":"Como converter vari\u00e1veis categ\u00f3ricas em num\u00e9ricas em r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Voc\u00ea pode usar qualquer um dos seguintes m\u00e9todos para converter uma vari\u00e1vel categ\u00f3rica em uma vari\u00e1vel num\u00e9rica em R:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 1: converter uma vari\u00e1vel categ\u00f3rica em num\u00e9rica<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df$var1 &lt;- unclass(df$var1)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 2: converter m\u00faltiplas vari\u00e1veis categ\u00f3ricas em valores num\u00e9ricos<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df[, c(' <span style=\"color: #ff0000;\">var1<\/span> ', ' <span style=\"color: #ff0000;\">var2<\/span> ')] &lt;- sapply(df[, c(' <span style=\"color: #ff0000;\">var1<\/span> ', ' <span style=\"color: #ff0000;\">var2<\/span> ')], unclass)<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 3: converter todas as vari\u00e1veis categ\u00f3ricas em valores num\u00e9ricos<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df[sapply(df, is. <span style=\"color: #3366ff;\">factor<\/span> )] &lt;- data. <span style=\"color: #3366ff;\">matrix<\/span> (df[sapply(df, <span style=\"color: #3366ff;\">is.factor<\/span> )])<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar cada m\u00e9todo com o seguinte quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame with some categorical variables\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=as. <span style=\"color: #3366ff;\">factor<\/span> (c('A', 'B', 'C', 'D')),\n                 conf=as. <span style=\"color: #3366ff;\">factor<\/span> (c('AL', 'AL', 'NL', 'NL')),\n                 win=as. <span style=\"color: #3366ff;\">factor<\/span> (c('Yes', 'No', 'No', 'Yes')),\n                 dots=c(122, 98, 106, 115))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  team conf win points\n1 A AL Yes 122\n2 B AL No 98\n3 C NL No 106\n4 D NL Yes 115\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>M\u00e9todo 1: converter uma vari\u00e1vel categ\u00f3rica em num\u00e9rica<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como converter uma vari\u00e1vel categ\u00f3rica em um quadro de dados em uma vari\u00e1vel num\u00e9rica:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#convert 'team' variable to numeric\n<\/span>df$team &lt;- unclass(df$team)\n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n  team conf win points\n1 1 AL Yes 122\n2 2 AL No. 98\n3 3 NL No 106\n4 4 NL Yes 115\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que os valores da vari\u00e1vel \u201cequipe\u201d foram convertidos para valores num\u00e9ricos.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>M\u00e9todo 2: converter m\u00faltiplas vari\u00e1veis categ\u00f3ricas em valores num\u00e9ricos<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como converter diversas vari\u00e1veis categ\u00f3ricas em um quadro de dados em vari\u00e1veis num\u00e9ricas:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#convert 'team' and 'win' variables to numeric\n<\/span>df[, c(' <span style=\"color: #ff0000;\">team<\/span> ', ' <span style=\"color: #ff0000;\">win<\/span> ')] &lt;- sapply(df[, c(' <span style=\"color: #ff0000;\">team<\/span> ', ' <span style=\"color: #ff0000;\">win<\/span> ')], unclass)\n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n  team conf win points\n1 1 AL 2 122\n2 2 AL 1 98\n3 3 NL 1,106\n4 4 NL 2 115\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que os valores das vari\u00e1veis \u201cequipe\u201d e \u201cvit\u00f3ria\u201d foram convertidos para valores num\u00e9ricos.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>M\u00e9todo 3: converter todas as vari\u00e1veis categ\u00f3ricas em valores num\u00e9ricos<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como converter todas as vari\u00e1veis categ\u00f3ricas em um quadro de dados em vari\u00e1veis num\u00e9ricas:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#convert all categorical variables to numeric\n<\/span>df[sapply(df, is. <span style=\"color: #3366ff;\">factor<\/span> )] &lt;- data. <span style=\"color: #3366ff;\">matrix<\/span> (df[sapply(df, <span style=\"color: #3366ff;\">is.factor<\/span> )])\n<span style=\"color: #008080;\">\n#view updated data frame\n<\/span>df\n\n  team conf win points\n1 1 1 2 122\n2 2 1 1 98\n3 3 2 1 106\n4 4 2 2 115\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que os valores de cada uma das vari\u00e1veis categ\u00f3ricas no quadro de dados foram convertidos em valores num\u00e9ricos.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir explicam como realizar outras convers\u00f5es comuns em R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/r-converter-data-em-numerico\/\" target=\"_blank\" rel=\"noopener\">Como converter uma data em num\u00e9rico em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/personagem-para-fatorar-em-r\/\" target=\"_blank\" rel=\"noopener\">Como converter um caractere em um fator em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/converter-fator-de-caractere-para-r\/\" target=\"_blank\" rel=\"noopener\">Como converter fator em caractere em R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar qualquer um dos seguintes m\u00e9todos para converter uma vari\u00e1vel categ\u00f3rica em uma vari\u00e1vel num\u00e9rica em R: M\u00e9todo 1: converter uma vari\u00e1vel categ\u00f3rica em num\u00e9rica df$var1 &lt;- unclass(df$var1) M\u00e9todo 2: converter m\u00faltiplas vari\u00e1veis categ\u00f3ricas em valores num\u00e9ricos df[, c(&#8216; var1 &#8216;, &#8216; var2 &#8216;)] &lt;- sapply(df[, c(&#8216; var1 &#8216;, &#8216; var2 &#8216;)], unclass) [&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-2282","post","type-post","status-publish","format-standard","hentry","category-guia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Como converter vari\u00e1veis categ\u00f3ricas em vari\u00e1veis num\u00e9ricas em R - Statorials<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como converter vari\u00e1veis categ\u00f3ricas em vari\u00e1veis num\u00e9ricas em R, com v\u00e1rios exemplos.\" \/>\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\/pt\/converter-uma-variavel-categorica-em-r-numerico\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como converter vari\u00e1veis categ\u00f3ricas em vari\u00e1veis num\u00e9ricas em R - Statorials\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como converter vari\u00e1veis categ\u00f3ricas em vari\u00e1veis num\u00e9ricas em R, com v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-22T22:58:19+00:00\" \/>\n<meta name=\"author\" content=\"Dr. benjamim anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr. benjamim anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/\",\"url\":\"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/\",\"name\":\"Como converter vari\u00e1veis categ\u00f3ricas em vari\u00e1veis num\u00e9ricas em R - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-22T22:58:19+00:00\",\"dateModified\":\"2023-07-22T22:58:19+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como converter vari\u00e1veis categ\u00f3ricas em vari\u00e1veis num\u00e9ricas em R, com v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/converter-uma-variavel-categorica-em-r-numerico\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como converter vari\u00e1veis categ\u00f3ricas em num\u00e9ricas em r\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pt\/#website\",\"url\":\"https:\/\/statorials.org\/pt\/\",\"name\":\"Statorials\",\"description\":\"O seu guia para a literacia estat\u00edstica!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pt\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\",\"name\":\"Dr. benjamim anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Dr. benjamim anderson\"},\"description\":\"Ol\u00e1, sou Benjamin, um professor aposentado de estat\u00edstica que se tornou professor dedicado na Statorials. 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