{"id":1544,"date":"2023-07-25T22:58:31","date_gmt":"2023-07-25T22:58:31","guid":{"rendered":"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/"},"modified":"2023-07-25T22:58:31","modified_gmt":"2023-07-25T22:58:31","slug":"mesa-bidirecional-em-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/","title":{"rendered":"Como criar uma tabela bidirecional em r (com exemplos)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Uma <strong>tabela bidirecional<\/strong> \u00e9 um tipo de tabela que exibe as frequ\u00eancias de duas vari\u00e1veis categ\u00f3ricas.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Por exemplo, a tabela bidirecional a seguir mostra os resultados de uma pesquisa que perguntou a 100 pessoas qual esporte elas preferiam: beisebol, basquete ou futebol americano.<\/span><\/p>\n<p> <span style=\"color: #000000;\">As linhas mostram o sexo do entrevistado e as colunas indicam o esporte escolhido:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-14595 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/jointfreq1.png\" alt=\"\" width=\"356\" height=\"124\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Este tutorial fornece v\u00e1rios exemplos de cria\u00e7\u00e3o e uso de arrays bidirecionais em R.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 1: Crie uma tabela de dupla entrada do zero<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como criar uma tabela de dupla entrada do zero usando a fun\u00e7\u00e3o <strong>as.table()<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create matrix\n<\/span>data &lt;- matrix(c(13, 23, 15, 16, 20, 13), ncol= <span style=\"color: #008000;\">3<\/span> )\n\n<span style=\"color: #008080;\">#specify row and column names of matrix\n<\/span><span style=\"color: #000000;\">rownames(data) &lt;- c('Male', 'Female')\ncolnames(data) &lt;- c('Baseball', 'Basketball', 'Football')<\/span>\n\n<span style=\"color: #008080;\">#convert matrix to table\n<\/span>data &lt;- as. <span style=\"color: #3366ff;\">table<\/span> (data)\n\n<span style=\"color: #008080;\">#display table\n<\/span>data\n\n       Baseball Basketball Soccer\nMale 13 15 20\nFemale 23 16 13<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 2: Crie uma tabela bidirecional a partir de dados<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como criar uma tabela bidirecional a partir de um quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (sport=c(' <span style=\"color: #008000;\">Base<\/span> ', ' <span style=\"color: #008000;\">Base<\/span> ', ' <span style=\"color: #008000;\">Bask<\/span> ', ' <span style=\"color: #008000;\">Foot<\/span> ', ' <span style=\"color: #008000;\">Foot<\/span> '),\n                 gender=c(' <span style=\"color: #008000;\">Male<\/span> ', ' <span style=\"color: #008000;\">Female<\/span> ', ' <span style=\"color: #008000;\">Male<\/span> ', ' <span style=\"color: #008000;\">Male<\/span> ', ' <span style=\"color: #008000;\">Female<\/span> '))\n\n<span style=\"color: #008080;\">#view data frame<\/span>\ndf\n\n<span style=\"color: #008080;\">#create two way table from data frame\n<\/span>data &lt;- table(df$gender, df$sport)\n\n<span style=\"color: #008080;\">#display two way table\n<\/span>data \n\n         Base Basketball\n  Female 1 0 1\n  Male 1 1 1\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 3: Calcular as somas das margens de uma tabela de partidas dobradas<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como calcular as somas das margens de uma tabela dupla usando a fun\u00e7\u00e3o <strong>margin.table()<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create matrix of data\n<\/span>data &lt;- matrix(c(13, 15, 20, 23, 16, 13), ncol=3)\nrownames(data) &lt;- c(' <span style=\"color: #008000;\">Male<\/span> ', ' <span style=\"color: #008000;\">Female<\/span> ')\ncolnames(data) &lt;- c(' <span style=\"color: #008000;\">Baseball<\/span> ', ' <span style=\"color: #008000;\">Basketball<\/span> ', ' <span style=\"color: #008000;\">Football<\/span> ')\n\n<span style=\"color: #008080;\">#find sum of genders\n<\/span>margin. <span style=\"color: #3366ff;\">table<\/span> (data, margin=1)\n\n  Male Female \n    49 51\n\n<span style=\"color: #008080;\">#find sum of sports\n\n<span style=\"color: #000000;\">margin. <span style=\"color: #3366ff;\">table<\/span> (data, margin=2)\n<\/span>\n<span style=\"color: #000000;\">Baseball Basketball Soccer \n        28 43 29<\/span> \n<\/span><\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 4: Visualizando as frequ\u00eancias de uma tabela bidirecional<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Uma maneira de visualizar frequ\u00eancias em uma tabela bidirecional \u00e9 criar um <strong>gr\u00e1fico de barras<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>barplot(data, legend= <span style=\"color: #008000;\">True<\/span> , beside= <span style=\"color: #008000;\">True<\/span> , main=' <span style=\"color: #008000;\">Favorite Sport by Gender<\/span> ')<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-15329 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/twowaytable1.png\" alt=\"\" width=\"364\" height=\"363\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Outra maneira de visualizar frequ\u00eancias em uma tabela bidirecional \u00e9 criar um <strong>gr\u00e1fico lado a lado<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>mosaicplot(data, main=' <span style=\"color: #008000;\">Sports Preferences<\/span> ', xlab=' <span style=\"color: #008000;\">Gender<\/span> ', ylab=' <span style=\"color: #008000;\">Favorite Sport<\/span> ')\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-15330 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/table-a-deux-voies2.png\" alt=\"\" width=\"398\" height=\"388\" srcset=\"\" sizes=\"auto, \"><\/p>\n<hr>\n<p> <span style=\"color: #000000;\">Voc\u00ea pode encontrar mais tutoriais de R <a href=\"https:\/\/statorials.org\/pt\/estatologia-explica-conceitos-de-forma-simples-e-direta-facilitamos-o-aprendizado-de-estatistica\/\" target=\"_blank\" rel=\"noopener\">nesta p\u00e1gina<\/a> .<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uma tabela bidirecional \u00e9 um tipo de tabela que exibe as frequ\u00eancias de duas vari\u00e1veis categ\u00f3ricas. Por exemplo, a tabela bidirecional a seguir mostra os resultados de uma pesquisa que perguntou a 100 pessoas qual esporte elas preferiam: beisebol, basquete ou futebol americano. As linhas mostram o sexo do entrevistado e as colunas indicam o [&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-1544","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 criar uma tabela bidirecional em R (com exemplos)<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como criar uma tabela de dupla entrada 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\/mesa-bidirecional-em-r\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como criar uma tabela bidirecional em R (com exemplos)\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como criar uma tabela de dupla entrada em R, com v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-25T22:58:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/jointfreq1.png\" \/>\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\/mesa-bidirecional-em-r\/\",\"url\":\"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/\",\"name\":\"Como criar uma tabela bidirecional em R (com exemplos)\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-25T22:58:31+00:00\",\"dateModified\":\"2023-07-25T22:58:31+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como criar uma tabela de dupla entrada em R, com v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como criar uma tabela bidirecional 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. Com vasta experi\u00eancia e conhecimento na \u00e1rea de estat\u00edstica, estou empenhado em compartilhar meu conhecimento para capacitar os alunos por meio de Statorials. Saber mais\",\"sameAs\":[\"https:\/\/statorials.org\/pt\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Como criar uma tabela bidirecional em R (com exemplos)","description":"Este tutorial explica como criar uma tabela de dupla entrada em R, com v\u00e1rios exemplos.","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:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/","og_locale":"pt_PT","og_type":"article","og_title":"Como criar uma tabela bidirecional em R (com exemplos)","og_description":"Este tutorial explica como criar uma tabela de dupla entrada em R, com v\u00e1rios exemplos.","og_url":"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/","og_site_name":"Statorials","article_published_time":"2023-07-25T22:58:31+00:00","og_image":[{"url":"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/jointfreq1.png"}],"author":"Dr. benjamim anderson","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"Dr. benjamim anderson","Tempo estimado de leitura":"2 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/","url":"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/","name":"Como criar uma tabela bidirecional em R (com exemplos)","isPartOf":{"@id":"https:\/\/statorials.org\/pt\/#website"},"datePublished":"2023-07-25T22:58:31+00:00","dateModified":"2023-07-25T22:58:31+00:00","author":{"@id":"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666"},"description":"Este tutorial explica como criar uma tabela de dupla entrada em R, com v\u00e1rios exemplos.","breadcrumb":{"@id":"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/#breadcrumb"},"inLanguage":"pt-PT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/statorials.org\/pt\/mesa-bidirecional-em-r\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Lar","item":"https:\/\/statorials.org\/pt\/"},{"@type":"ListItem","position":2,"name":"Como criar uma tabela bidirecional 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. Com vasta experi\u00eancia e conhecimento na \u00e1rea de estat\u00edstica, estou empenhado em compartilhar meu conhecimento para capacitar os alunos por meio de Statorials. Saber mais","sameAs":["https:\/\/statorials.org\/pt"]}]}},"yoast_meta":{"yoast_wpseo_title":"","yoast_wpseo_metadesc":"","yoast_wpseo_canonical":""},"_links":{"self":[{"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/posts\/1544","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/comments?post=1544"}],"version-history":[{"count":0,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/posts\/1544\/revisions"}],"wp:attachment":[{"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/media?parent=1544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/categories?post=1544"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/tags?post=1544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}