{"id":497,"date":"2023-07-29T17:13:41","date_gmt":"2023-07-29T17:13:41","guid":{"rendered":"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/"},"modified":"2023-07-29T17:13:41","modified_gmt":"2023-07-29T17:13:41","slug":"desvio-padrao-em-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/","title":{"rendered":"Como calcular o desvio padr\u00e3o em r (com exemplos)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><span style=\"color: #000000;\">Voc\u00ea pode usar a seguinte sintaxe para calcular o desvio padr\u00e3o de um vetor em R:<\/span><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sd(x)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que esta f\u00f3rmula calcula o desvio padr\u00e3o da amostra usando a seguinte f\u00f3rmula:<\/span><\/p>\n<p style=\"text-align: center;\"> <span style=\"color: #000000;\">\u221a <span style=\"border-top: 1px solid black;\">\u03a3 ( <sub>xi<\/sub> \u2013 \u03bc) <sup>2<\/sup> \/ (n-1)<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\">Ouro:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>\u03a3<\/strong> : Um s\u00edmbolo sofisticado que significa \u201csoma\u201d<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>x <sub>i<\/sub><\/strong> : o i- <sup>\u00e9simo<\/sup> valor do conjunto de dados<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>\u03bc<\/strong> : O valor m\u00e9dio do conjunto de dados<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>n:<\/strong> O tamanho da amostra<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar esta fun\u00e7\u00e3o na pr\u00e1tica.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 1: Calcule o desvio padr\u00e3o do vetor<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como calcular o desvio padr\u00e3o de um \u00fanico vetor em R:<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create dataset\n<\/span>data &lt;- c(1, 3, 4, 6, 11, 14, 17, 20, 22, 23)\n\n<span style=\"color: #008080;\">#find standard deviation\n<\/span>sd(data)\n\n[1] 8.279157<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que voc\u00ea deve usar <strong>na.rm = TRUE<\/strong> para calcular o desvio padr\u00e3o se houver valores ausentes no conjunto de dados:<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create dataset with missing values\n<\/span>data &lt;- c(1, 3, 4, 6, NA, 14, NA, 20, 22, 23)\n\n<span style=\"color: #008080;\">#attempt to find standard deviation\n<\/span>sd(data)\n\n[1] NA\n\n<span style=\"color: #008080;\">#find standard deviation and specify to ignore missing values<\/span>\nsd(data, na. <span style=\"color: #3366ff;\">rm<\/span> = <span style=\"color: #008000;\">TRUE<\/span> )\n\n[1] 9.179753\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 2: Calcule o desvio padr\u00e3o de uma coluna em um quadro de dados<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como calcular o desvio padr\u00e3o de uma \u00fanica coluna em um quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame\n<\/span>data &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (a=c(1, 3, 4, 6, 8, 9),\n                   b=c(7, 8, 8, 7, 13, 16),\n                   c=c(11, 13, 13, 18, 19, 22),\n                   d=c(12, 16, 18, 22, 29, 38))\n\n<span style=\"color: #008080;\">#find standard deviation of column a\n<\/span>sd(data$a)\n\n[1] 3.060501\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 3: Calcule o desvio padr\u00e3o de m\u00faltiplas colunas em um quadro de dados<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como calcular o desvio padr\u00e3o de m\u00faltiplas colunas em um quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame\n<\/span>data &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (a=c(1, 3, 4, 6, 8, 9),\n                   b=c(7, 8, 8, 7, 13, 16),\n                   c=c(11, 13, 13, 18, 19, 22),\n                   d=c(12, 16, 18, 22, 29, 38))\n\n<span style=\"color: #008080;\">#find standard deviation of specific columns in data frame\n<\/span>apply(data[, c(' <span style=\"color: #ff0000;\">a<\/span> ', ' <span style=\"color: #ff0000;\">c<\/span> ', ' <span style=\"color: #ff0000;\">d<\/span> ')], 2, sd)\n\n       acd\n3.060501 4.289522 9.544632<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pt\/praia-em-r\/\" target=\"_blank\" rel=\"noopener\">Como encontrar o intervalo em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/variacao-em-r\/\" target=\"_blank\" rel=\"noopener\">Como calcular a vari\u00e2ncia amostral e populacional em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/remover-valores-discrepantes-r\/\" target=\"_blank\" rel=\"noopener\">Como remover outliers em R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar a seguinte sintaxe para calcular o desvio padr\u00e3o de um vetor em R: sd(x) Observe que esta f\u00f3rmula calcula o desvio padr\u00e3o da amostra usando a seguinte f\u00f3rmula: \u221a \u03a3 ( xi \u2013 \u03bc) 2 \/ (n-1) Ouro: \u03a3 : Um s\u00edmbolo sofisticado que significa \u201csoma\u201d x i : o i- \u00e9simo [&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-497","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 calcular o desvio padr\u00e3o em R (com exemplos)<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como calcular o desvio padr\u00e3o 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\/desvio-padrao-em-r\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como calcular o desvio padr\u00e3o em R (com exemplos)\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como calcular o desvio padr\u00e3o em R, com v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-29T17:13:41+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\/desvio-padrao-em-r\/\",\"url\":\"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/\",\"name\":\"Como calcular o desvio padr\u00e3o em R (com exemplos)\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-29T17:13:41+00:00\",\"dateModified\":\"2023-07-29T17:13:41+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como calcular o desvio padr\u00e3o em R, com v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como calcular o desvio padr\u00e3o 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 calcular o desvio padr\u00e3o em R (com exemplos)","description":"Este tutorial explica como calcular o desvio padr\u00e3o 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\/desvio-padrao-em-r\/","og_locale":"pt_PT","og_type":"article","og_title":"Como calcular o desvio padr\u00e3o em R (com exemplos)","og_description":"Este tutorial explica como calcular o desvio padr\u00e3o em R, com v\u00e1rios exemplos.","og_url":"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/","og_site_name":"Statorials","article_published_time":"2023-07-29T17:13:41+00:00","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\/desvio-padrao-em-r\/","url":"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/","name":"Como calcular o desvio padr\u00e3o em R (com exemplos)","isPartOf":{"@id":"https:\/\/statorials.org\/pt\/#website"},"datePublished":"2023-07-29T17:13:41+00:00","dateModified":"2023-07-29T17:13:41+00:00","author":{"@id":"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666"},"description":"Este tutorial explica como calcular o desvio padr\u00e3o em R, com v\u00e1rios exemplos.","breadcrumb":{"@id":"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/#breadcrumb"},"inLanguage":"pt-PT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/statorials.org\/pt\/desvio-padrao-em-r\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Lar","item":"https:\/\/statorials.org\/pt\/"},{"@type":"ListItem","position":2,"name":"Como calcular o desvio padr\u00e3o 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\/497","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=497"}],"version-history":[{"count":0,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/posts\/497\/revisions"}],"wp:attachment":[{"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/media?parent=497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/categories?post=497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/tags?post=497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}