{"id":675,"date":"2023-07-29T03:17:03","date_gmt":"2023-07-29T03:17:03","guid":{"rendered":"https:\/\/statorials.org\/pt\/cartao\/"},"modified":"2023-07-29T03:17:03","modified_gmt":"2023-07-29T03:17:03","slug":"cartao","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/cartao\/","title":{"rendered":"Como calcular o mape em r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Uma das m\u00e9tricas mais comumente usadas para medir a precis\u00e3o da previs\u00e3o de um modelo \u00e9 <strong>MAPE<\/strong> , que <strong>significa erro percentual m\u00e9dio absoluto<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">A f\u00f3rmula para calcular o MAPE \u00e9 a seguinte:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>MAPE<\/strong> = (1\/n) * \u03a3(|real \u2013 previs\u00e3o| \/ |real|) * 100<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ouro:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>\u03a3<\/strong> \u2013 um s\u00edmbolo sofisticado que significa \u201csoma\u201d<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>n<\/strong> \u2013 tamanho da amostra<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>real<\/strong> \u2013 o valor real dos dados<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>previs\u00e3o<\/strong> \u2013 o valor esperado dos dados<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">MAPE \u00e9 comumente usado porque \u00e9 f\u00e1cil de interpretar e explicar. Por exemplo, um valor MAPE de 6% significa que a diferen\u00e7a m\u00e9dia entre o valor previsto e o valor real \u00e9 de 6%.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este tutorial fornece dois m\u00e9todos diferentes que voc\u00ea pode usar para calcular MAPE em R.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>M\u00e9todo 1: escreva sua pr\u00f3pria fun\u00e7\u00e3o<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos um conjunto de dados com uma coluna contendo os valores reais dos dados e uma coluna contendo os valores previstos dos dados:<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create dataset<\/span>\ndata &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (actual=c(34, 37, 44, 47, 48, 48, 46, 43, 32, 27, 26, 24),\n                   forecast=c(37, 40, 46, 44, 46, 50, 45, 44, 34, 30, 22, 23))\n<span style=\"color: #008080;\">\n#view dataset<\/span>\ndata\n\n   current forecast\n1 34 37\n2 37 40\n3 44 46\n4 47 44\n5 48 46\n6 48 50\n7 46 45\n8 43 44\n9 32 34\n10 27 30\n11 26 22\n12 24 23\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Para calcular o MAPE, podemos usar a seguinte fun\u00e7\u00e3o:<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#calculate MAPE<\/span>\nmean(abs((data$actual-data$forecast)\/data$actual)) * 100\n\n[1] 6.467108\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">O MAPE para este modelo \u00e9 de <strong>6,467%<\/strong> . Ou seja, a diferen\u00e7a absoluta m\u00e9dia entre o valor previsto e o valor real \u00e9 de 6,467%.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>M\u00e9todo 2: use um pacote<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Tamb\u00e9m poder\u00edamos calcular MAPE para o mesmo conjunto de dados usando a fun\u00e7\u00e3o <strong>MAPE()<\/strong> do pacote <strong>MLmetrics<\/strong> , que usa a seguinte sintaxe:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>MAPE(y_pred, y_true)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Ouro:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>y_pred:<\/strong> valores previstos<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>y_true:<\/strong> valores reais<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Aqui est\u00e1 a sintaxe que usar\u00edamos em nosso exemplo:<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#load MLmetrics package<\/span>\n<span style=\"color: #008000;\">library<\/span> (MLmetrics)\n\n<span style=\"color: #008080;\">#calculate MAPE<\/span>\nMAPE(data$forecast, data$actual)\n\n[1] 0.06467108<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isto produz o mesmo valor MAPE de <strong>6,467%<\/strong> que calculamos usando o m\u00e9todo anterior.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uma das m\u00e9tricas mais comumente usadas para medir a precis\u00e3o da previs\u00e3o de um modelo \u00e9 MAPE , que significa erro percentual m\u00e9dio absoluto . A f\u00f3rmula para calcular o MAPE \u00e9 a seguinte: MAPE = (1\/n) * \u03a3(|real \u2013 previs\u00e3o| \/ |real|) * 100 Ouro: \u03a3 \u2013 um s\u00edmbolo sofisticado que significa \u201csoma\u201d n [&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-675","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 MAPE em R - Estatoriais<\/title>\n<meta name=\"description\" content=\"Uma explica\u00e7\u00e3o simples de como calcular o MAPE em R, incluindo 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\/cartao\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como calcular MAPE em R - Estatoriais\" \/>\n<meta property=\"og:description\" content=\"Uma explica\u00e7\u00e3o simples de como calcular o MAPE em R, incluindo v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/cartao\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-29T03:17:03+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=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/cartao\/\",\"url\":\"https:\/\/statorials.org\/pt\/cartao\/\",\"name\":\"Como calcular MAPE em R - Estatoriais\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-29T03:17:03+00:00\",\"dateModified\":\"2023-07-29T03:17:03+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Uma explica\u00e7\u00e3o simples de como calcular o MAPE em R, incluindo v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/cartao\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/cartao\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/cartao\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como calcular o mape 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. 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 MAPE em R - Estatoriais","description":"Uma explica\u00e7\u00e3o simples de como calcular o MAPE em R, incluindo 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\/cartao\/","og_locale":"pt_PT","og_type":"article","og_title":"Como calcular MAPE em R - Estatoriais","og_description":"Uma explica\u00e7\u00e3o simples de como calcular o MAPE em R, incluindo v\u00e1rios exemplos.","og_url":"https:\/\/statorials.org\/pt\/cartao\/","og_site_name":"Statorials","article_published_time":"2023-07-29T03:17:03+00:00","author":"Dr. benjamim anderson","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"Dr. benjamim anderson","Tempo estimado de leitura":"1 minuto"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/statorials.org\/pt\/cartao\/","url":"https:\/\/statorials.org\/pt\/cartao\/","name":"Como calcular MAPE em R - Estatoriais","isPartOf":{"@id":"https:\/\/statorials.org\/pt\/#website"},"datePublished":"2023-07-29T03:17:03+00:00","dateModified":"2023-07-29T03:17:03+00:00","author":{"@id":"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666"},"description":"Uma explica\u00e7\u00e3o simples de como calcular o MAPE em R, incluindo v\u00e1rios exemplos.","breadcrumb":{"@id":"https:\/\/statorials.org\/pt\/cartao\/#breadcrumb"},"inLanguage":"pt-PT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/statorials.org\/pt\/cartao\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/statorials.org\/pt\/cartao\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Lar","item":"https:\/\/statorials.org\/pt\/"},{"@type":"ListItem","position":2,"name":"Como calcular o mape 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. 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\/675","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=675"}],"version-history":[{"count":0,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/posts\/675\/revisions"}],"wp:attachment":[{"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/media?parent=675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/categories?post=675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/statorials.org\/pt\/wp-json\/wp\/v2\/tags?post=675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}