{"id":4173,"date":"2023-07-13T02:50:18","date_gmt":"2023-07-13T02:50:18","guid":{"rendered":"https:\/\/statorials.org\/pt\/r-extrai-string-entre-caracteres\/"},"modified":"2023-07-13T02:50:18","modified_gmt":"2023-07-13T02:50:18","slug":"r-extrai-string-entre-caracteres","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/r-extrai-string-entre-caracteres\/","title":{"rendered":"Como extrair uma string entre caracteres espec\u00edficos em r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Voc\u00ea pode usar os seguintes m\u00e9todos para extrair uma string entre caracteres espec\u00edficos em R:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 1: Extraia string entre caracteres espec\u00edficos usando Base R<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>gsub(\" <span style=\"color: #ff0000;\">.*char1 (.+) char2.*\", \"\\\\1<\/span> \", my_string)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 2: Extraia string entre caracteres espec\u00edficos usando stringr<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (stringr)\n\nstr_match(my_string, \" <span style=\"color: #ff0000;\">char1\\\\s*(.*?)\\\\s*char2<\/span> \")[,2]\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Esses dois exemplos extraem a string entre <strong>char1<\/strong> e <strong>char2<\/strong> em <strong>my_string<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar cada m\u00e9todo na pr\u00e1tica com o seguinte quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('team Mavs pro', 'team Heat pro', 'team Nets pro'),\n                 dots=c(114, 135, 119))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n           team points\n1 Mavs pro team 114\n2 team Heat pro 135\n3 pro Nets team 119<\/strong><\/span><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo 1: Extraia uma string entre caracteres espec\u00edficos usando Base R<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como extrair a string entre os caracteres <em>team<\/em> e <em>pro<\/em> para cada linha na coluna <strong>team<\/strong> do quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create new column that extracts string between team and pro\n<\/span>df$team_name &lt;- gsub(\" <span style=\"color: #ff0000;\">.*team (.+) pro.*\", \"\\\\1<\/span> \", df$team)\n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n           team points team_name\n1 Mavs pro team 114 Mavs\n2 team Heat pro 135 Heat\n3 Nets pro team 119 Nets<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que a nova coluna chamada <strong>team_name<\/strong> cont\u00e9m a string entre os caracteres <em>team<\/em> e <em>pro<\/em> para cada linha na coluna <strong>team<\/strong> do quadro de dados.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Relacionado<\/strong> : <a href=\"https:\/\/statorials.org\/pt\/sob-gr\/\" target=\"_blank\" rel=\"noopener\">Uma introdu\u00e7\u00e3o ao gsub() em R<\/a><\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo 2: Extraia uma string entre caracteres espec\u00edficos usando o pacote stringr<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como extrair a string entre os caracteres <em>team<\/em> e <em>pro<\/em> para cada linha na coluna <strong>team<\/strong> do quadro de dados usando a fun\u00e7\u00e3o <strong>str_match()<\/strong> do pacote <strong>stringr<\/strong> em R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (stringr)<\/span>\n\n#create new column that extracts string between team and pro\n<\/span>df$team_name &lt;- str_match(df$team, \" <span style=\"color: #ff0000;\">team\\\\s*(.*?)\\\\s*pro<\/span> \")[,2]\n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n           team points team_name\n1 Mavs pro team 114 Mavs\n2 team Heat pro 135 Heat\n3 Nets pro team 119 Nets<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que a nova coluna chamada <strong>team_name<\/strong> cont\u00e9m a string entre os caracteres <em>team<\/em> e <em>pro<\/em> para cada linha na coluna <strong>team<\/strong> do quadro de dados.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Isso corresponde aos resultados do uso da fun\u00e7\u00e3o <strong>gsub()<\/strong> na base R.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe que a fun\u00e7\u00e3o <strong>str_match()<\/strong> retorna uma matriz na qual a primeira coluna cont\u00e9m as strings originais e a segunda coluna cont\u00e9m a substring de interesse.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Assim, devemos usar <strong>[,2]<\/strong> para extrair apenas a segunda coluna da matriz retornada pela fun\u00e7\u00e3o <strong>str_match()<\/strong> .<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir explicam como realizar outras tarefas comuns em R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/r-selecione-colunas-contendo-string\/\" target=\"_blank\" rel=\"noopener\">Como selecionar colunas contendo uma string espec\u00edfica em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/r-remover-caractere-da-string\/\" target=\"_blank\" rel=\"noopener\">Como remover caracteres de uma string em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/r-procure-por-caractere-em-string\/\" target=\"_blank\" rel=\"noopener\">Como encontrar a localiza\u00e7\u00e3o dos caracteres em uma string em R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar os seguintes m\u00e9todos para extrair uma string entre caracteres espec\u00edficos em R: M\u00e9todo 1: Extraia string entre caracteres espec\u00edficos usando Base R gsub(&#8221; .*char1 (.+) char2.*&#8221;, &#8220;\\\\1 &#8220;, my_string) M\u00e9todo 2: Extraia string entre caracteres espec\u00edficos usando stringr library (stringr) str_match(my_string, &#8221; char1\\\\s*(.*?)\\\\s*char2 &#8220;)[,2] Esses dois exemplos extraem a string entre char1 [&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-4173","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 extrair uma string entre caracteres espec\u00edficos em R - Estatoriais<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como extrair uma string entre caracteres espec\u00edficos 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\/r-extrai-string-entre-caracteres\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como extrair uma string entre caracteres espec\u00edficos em R - Estatoriais\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como extrair uma string entre caracteres espec\u00edficos em R, com v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/r-extrai-string-entre-caracteres\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-13T02:50:18+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\/r-extrai-string-entre-caracteres\/\",\"url\":\"https:\/\/statorials.org\/pt\/r-extrai-string-entre-caracteres\/\",\"name\":\"Como extrair uma string entre caracteres espec\u00edficos em R - Estatoriais\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-13T02:50:18+00:00\",\"dateModified\":\"2023-07-13T02:50:18+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como extrair uma string entre caracteres espec\u00edficos em R, com v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/r-extrai-string-entre-caracteres\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/r-extrai-string-entre-caracteres\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/r-extrai-string-entre-caracteres\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como extrair uma string entre caracteres espec\u00edficos 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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