{"id":942,"date":"2023-07-28T05:52:17","date_gmt":"2023-07-28T05:52:17","guid":{"rendered":"https:\/\/statorials.org\/pt\/contar-por-grupo-r\/"},"modified":"2023-07-28T05:52:17","modified_gmt":"2023-07-28T05:52:17","slug":"contar-por-grupo-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/contar-por-grupo-r\/","title":{"rendered":"Como contar observa\u00e7\u00f5es por grupo em r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Muitas vezes voc\u00ea pode estar interessado em contar o n\u00famero de <a href=\"https:\/\/statorials.org\/pt\/observacao-em-estatisticas\/\" target=\"_blank\" rel=\"noopener noreferrer\">observa\u00e7\u00f5es<\/a> por grupo em R.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Felizmente, isso \u00e9 f\u00e1cil de fazer usando a fun\u00e7\u00e3o <a href=\"https:\/\/dplyr.tidyverse.org\/reference\/count.html\" target=\"_blank\" rel=\"noopener noreferrer\">count()<\/a> da biblioteca <a href=\"https:\/\/dplyr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">dplyr<\/a> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este tutorial explica v\u00e1rios exemplos de uso pr\u00e1tico desta fun\u00e7\u00e3o usando o seguinte data frame:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data.frame(team = c('A', 'A', 'A', 'B', 'B', 'B', 'B', 'B', 'C', 'C' , 'CC'),\n                 position = c('G', 'G', 'F', 'G', 'F', 'F', 'F', 'G', 'G', 'F', 'F', 'F '),\n                 points = c(4, 13, 7, 8, 15, 15, 17, 9, 21, 22, 25, 31))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n   team position points\n1 GA 4\n2 AG 13\n3AF 7\n4 BG 8\n5 BF 15\n6 BF 15\n7 BF 17\n8 BG 9\n9 GC 21\n10 CF 22\n11 CF 25\n12 CF 31\n<\/strong><\/pre>\n<h3> <strong>Exemplo 1: contagem por uma vari\u00e1vel<\/strong><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como contar o n\u00famero total de jogadores por equipe:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #993300;\">library<\/span> (dplyr)<\/span>\n\n#count total observations by variable 'team'<\/span>\ndf %&gt;% count(team)\n\n# A tibble: 3 x 2\n  team n\n   \n1 to 3\n2 B 5\n3 C 4\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Pelo resultado podemos ver que:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">A equipe A \u00e9 composta por 3 jogadores<\/span><\/li>\n<li> <span style=\"color: #000000;\">A equipe B \u00e9 composta por 5 jogadores<\/span><\/li>\n<li> <span style=\"color: #000000;\">A equipe C \u00e9 composta por 4 jogadores<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Esta fun\u00e7\u00e3o count() \u00fanica nos d\u00e1 uma boa ideia da distribui\u00e7\u00e3o de jogadores por equipe.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe que tamb\u00e9m podemos <strong>classificar<\/strong> as contagens se quisermos:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count total observations by variable 'team'<\/span>\ndf %&gt;% count(team, sort= <span style=\"color: #008000;\">TRUE<\/span> )\n\n# A tibble: 3 x 2\n  team n\n   \n1 B 5\n2 C 4\n3 to 3<\/strong><\/pre>\n<h3> <strong>Exemplo 2: Contando por diversas vari\u00e1veis<\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Tamb\u00e9m podemos classificar por diversas vari\u00e1veis:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count total observations by 'team' and 'position'\n<\/span>df %&gt;% count(team, position)\n\n# A tibble: 6 x 3\n  team position n\n       \n1 AF 1\n2 AG 2\n3 BF 3\n4 BG 2\n5 CF 3\n6 GC 1\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Pelo resultado podemos ver que:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O Time A possui 1 jogador na posi\u00e7\u00e3o \u201cF\u201d (avan\u00e7ado) e 2 jogadores na posi\u00e7\u00e3o \u201cG\u201d (guarda).<\/span><\/li>\n<li> <span style=\"color: #000000;\">O Time B possui 3 jogadores na posi\u00e7\u00e3o \u201cF\u201d (atacante) e 2 jogadores na posi\u00e7\u00e3o \u201cG\u201d (guarda).<\/span><\/li>\n<li> <span style=\"color: #000000;\">O Time C possui 3 jogadores na posi\u00e7\u00e3o \u201cF\u201d (avan\u00e7ado) e 1 jogador na posi\u00e7\u00e3o \u201cG\u201d (guarda).<\/span><\/li>\n<\/ul>\n<h3> <strong>Exemplo 3: n\u00famero ponderado<\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Tamb\u00e9m podemos \u201cponderar\u201d as contagens de uma vari\u00e1vel por outra vari\u00e1vel. Por exemplo, o c\u00f3digo a seguir mostra como contar o total de observa\u00e7\u00f5es por equipe, usando a vari\u00e1vel \u201cpontos\u201d como peso:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df %&gt;% count(team, wt= <span style=\"color: #008000;\">points<\/span> )\n\n# A tibble: 3 x 2\n  team n\n   \n1 to 24\n2 B 64\n3 C 99\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><em>Voc\u00ea pode encontrar a documenta\u00e7\u00e3o completa da fun\u00e7\u00e3o <strong>count()<\/strong> <a href=\"https:\/\/dplyr.tidyverse.org\/reference\/count.html\" target=\"_blank\" rel=\"noopener noreferrer\">aqui<\/a> .<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Muitas vezes voc\u00ea pode estar interessado em contar o n\u00famero de observa\u00e7\u00f5es por grupo em R. Felizmente, isso \u00e9 f\u00e1cil de fazer usando a fun\u00e7\u00e3o count() da biblioteca dplyr . Este tutorial explica v\u00e1rios exemplos de uso pr\u00e1tico desta fun\u00e7\u00e3o usando o seguinte data frame: #create data frame df &lt;- data.frame(team = c(&#8216;A&#8217;, &#8216;A&#8217;, &#8216;A&#8217;, [&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-942","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 contar observa\u00e7\u00f5es por grupo em R - Estatologia<\/title>\n<meta name=\"description\" content=\"Uma explica\u00e7\u00e3o simples sobre como contar o n\u00famero total de observa\u00e7\u00f5es por grupo em R.\" \/>\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\/contar-por-grupo-r\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como contar observa\u00e7\u00f5es por grupo em R - Estatologia\" \/>\n<meta property=\"og:description\" content=\"Uma explica\u00e7\u00e3o simples sobre como contar o n\u00famero total de observa\u00e7\u00f5es por grupo em R.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/contar-por-grupo-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T05:52:17+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\/contar-por-grupo-r\/\",\"url\":\"https:\/\/statorials.org\/pt\/contar-por-grupo-r\/\",\"name\":\"Como contar observa\u00e7\u00f5es por grupo em R - Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-28T05:52:17+00:00\",\"dateModified\":\"2023-07-28T05:52:17+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Uma explica\u00e7\u00e3o simples sobre como contar o n\u00famero total de observa\u00e7\u00f5es por grupo em R.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/contar-por-grupo-r\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/contar-por-grupo-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/contar-por-grupo-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como contar observa\u00e7\u00f5es por grupo 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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