{"id":3497,"date":"2023-07-17T04:28:59","date_gmt":"2023-07-17T04:28:59","guid":{"rendered":"https:\/\/statorials.org\/pt\/toque-r\/"},"modified":"2023-07-17T04:28:59","modified_gmt":"2023-07-17T04:28:59","slug":"toque-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/toque-r\/","title":{"rendered":"Como usar a fun\u00e7\u00e3o tapply() em r (com exemplos)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">A fun\u00e7\u00e3o <strong>tapply()<\/strong> em R pode ser usada para aplicar uma fun\u00e7\u00e3o a um vetor, agrupado por outro vetor.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Esta fun\u00e7\u00e3o usa a seguinte sintaxe b\u00e1sica:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>seringueiro (X, \u00cdNDICE, DIVERS\u00c3O, ..)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Ouro:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>X<\/strong> : Um vetor ao qual aplicar uma fun\u00e7\u00e3o<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>\u00cdNDICE<\/strong> : Um vetor para agrupar<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>DIVERS\u00c3O<\/strong> : A fun\u00e7\u00e3o a ser aplicada<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar esta fun\u00e7\u00e3o na pr\u00e1tica com o seguinte quadro de dados 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: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'A', 'A', 'A', 'B', 'B', 'B', 'B'),\n                 position=c('G', 'G', 'F', 'F', 'G', 'G', 'F', 'F'),\n                 points=c(14, 19, 13, 8, 15, 15, 17, 19),\n                 assists=c(4, 3, 3, 5, 9, 14, 15, 12))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  team position points assists\n1 AG 14 4\n2 AG 19 3\n3 AF 13 3\n4 AF 8 5\n5 BG 15 9\n6 BG 15 14\n7 BF 17 15\n8 BF 19 12<\/span><\/span><\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo 1: aplicar uma fun\u00e7\u00e3o a uma vari\u00e1vel, agrupada por uma vari\u00e1vel<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar a fun\u00e7\u00e3o <strong>tapply()<\/strong> para calcular o valor m\u00e9dio <strong>dos pontos<\/strong> , agrupados por <strong>equipe<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#calculate mean of points, grouped by team\n<\/span>tapply(df$points, df$team, mean)\n\n   AB\n13.5 16.5<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Pelo resultado podemos ver:<\/span><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O valor m\u00e9dio de pontos da equipe A \u00e9 <strong>13,5<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor m\u00e9dio de pontos da equipe B \u00e9 <strong>16,5<\/strong> .<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Observe que voc\u00ea tamb\u00e9m pode incluir argumentos adicionais ap\u00f3s a fun\u00e7\u00e3o, como <strong>na.rm<\/strong> , para indicar que deseja calcular a m\u00e9dia ignorando os valores NA no quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#calculate mean of points, grouped by team\n<\/span>tapply(df$points, df$team, mean, na. <span style=\"color: #3366ff;\">rm<\/span> = <span style=\"color: #008000;\">TRUE<\/span> )\n\n   AB\n13.5 16.5<\/span><\/span><\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo 2: aplicar uma fun\u00e7\u00e3o a uma vari\u00e1vel, agrupada por diversas vari\u00e1veis<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar a fun\u00e7\u00e3o <strong>tapply()<\/strong> para calcular o valor m\u00e9dio <strong>dos pontos<\/strong> , agrupados por <strong>equipe<\/strong> e <strong>posi\u00e7\u00e3o<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"># <span style=\"color: #000000;\"><span style=\"color: #008080;\">calculate mean of points, grouped by team and position<\/span>\ntapply(df$points, list(df$team, df$position), mean, na. <span style=\"color: #3366ff;\">rm<\/span> = <span style=\"color: #008000;\">TRUE<\/span> )<\/span>\n\n<span style=\"color: #000000;\">FG\nA 10.5 16.5\nB 18.0 15.0\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Pelo resultado podemos ver:<\/span><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O valor m\u00e9dio de pontos da equipe A e da posi\u00e7\u00e3o F \u00e9 <strong>10,5<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor m\u00e9dio de pontos da equipe A e da posi\u00e7\u00e3o G \u00e9 <strong>16,5<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor m\u00e9dio de pontos da equipe B e da posi\u00e7\u00e3o F \u00e9 <strong>18,0<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor m\u00e9dio de pontos da equipe B e da posi\u00e7\u00e3o G \u00e9 <strong>15,0<\/strong> .<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : Neste exemplo, agrupamos por duas vari\u00e1veis, mas podemos incluir quantas vari\u00e1veis quisermos na fun\u00e7\u00e3o <strong>list()<\/strong> para agrupar ainda mais vari\u00e1veis.<\/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 usar outras fun\u00e7\u00f5es comuns em R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/funcao-r-dim\/\" target=\"_blank\" rel=\"noopener\">Como usar a fun\u00e7\u00e3o dim() em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/funcao-de-tabela-em-r\/\" target=\"_blank\" rel=\"noopener\">Como usar a fun\u00e7\u00e3o table() em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/funcao-de-sinal-em-r\/\" target=\"_blank\" rel=\"noopener\">Como usar a fun\u00e7\u00e3o sign() em R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A fun\u00e7\u00e3o tapply() em R pode ser usada para aplicar uma fun\u00e7\u00e3o a um vetor, agrupado por outro vetor. Esta fun\u00e7\u00e3o usa a seguinte sintaxe b\u00e1sica: seringueiro (X, \u00cdNDICE, DIVERS\u00c3O, ..) Ouro: X : Um vetor ao qual aplicar uma fun\u00e7\u00e3o \u00cdNDICE : Um vetor para agrupar DIVERS\u00c3O : A fun\u00e7\u00e3o a ser aplicada Os [&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-3497","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 usar a fun\u00e7\u00e3o tapply() em R (com exemplos) \u2013 Estatoriais<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o tapply() 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\/toque-r\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como usar a fun\u00e7\u00e3o tapply() em R (com exemplos) \u2013 Estatoriais\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o tapply() em R, com v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/toque-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-17T04:28:59+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\/toque-r\/\",\"url\":\"https:\/\/statorials.org\/pt\/toque-r\/\",\"name\":\"Como usar a fun\u00e7\u00e3o tapply() em R (com exemplos) \u2013 Estatoriais\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-17T04:28:59+00:00\",\"dateModified\":\"2023-07-17T04:28:59+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como usar a fun\u00e7\u00e3o tapply() em R, com v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/toque-r\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/toque-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/toque-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como usar a fun\u00e7\u00e3o tapply() em r (com exemplos)\"}]},{\"@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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