{"id":4320,"date":"2023-07-12T00:55:26","date_gmt":"2023-07-12T00:55:26","guid":{"rendered":"https:\/\/statorials.org\/pt\/pandas-descrevem-apenas-padrao-medio\/"},"modified":"2023-07-12T00:55:26","modified_gmt":"2023-07-12T00:55:26","slug":"pandas-descrevem-apenas-padrao-medio","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/pandas-descrevem-apenas-padrao-medio\/","title":{"rendered":"Pandas: como usar description() apenas para m\u00e9dia e padr\u00e3o"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Voc\u00ea pode usar a fun\u00e7\u00e3o <strong>description()<\/strong> para gerar <a href=\"https:\/\/statorials.org\/pt\/estatistica-inferencial-descritiva\/\" target=\"_blank\" rel=\"noopener\">estat\u00edsticas descritivas<\/a> para vari\u00e1veis em um DataFrame do pandas.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Por padr\u00e3o, a fun\u00e7\u00e3o <strong>descreva()<\/strong> calcula as seguintes m\u00e9tricas para cada vari\u00e1vel num\u00e9rica em um DataFrame:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">contagem (n\u00famero de valores)<\/span><\/li>\n<li> <span style=\"color: #000000;\">m\u00e9dia (valor m\u00e9dio)<\/span><\/li>\n<li> <span style=\"color: #000000;\">padr\u00e3o (desvio padr\u00e3o)<\/span><\/li>\n<li> <span style=\"color: #000000;\">min (valor m\u00ednimo)<\/span><\/li>\n<li> <span style=\"color: #000000;\">25% (percentil 25)<\/span><\/li>\n<li> <span style=\"color: #000000;\">50% (percentil 50)<\/span><\/li>\n<li> <span style=\"color: #000000;\">75% (percentil 75)<\/span><\/li>\n<li> <span style=\"color: #000000;\">m\u00e1x (valor m\u00e1ximo)<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">No entanto, voc\u00ea pode usar a seguinte sintaxe para calcular apenas a m\u00e9dia e o desvio padr\u00e3o de cada vari\u00e1vel num\u00e9rica:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>df. <span style=\"color: #3366ff;\">describe<\/span> (). <span style=\"color: #3366ff;\">loc<\/span> [[' <span style=\"color: #ff0000;\">mean<\/span> ', ' <span style=\"color: #ff0000;\">std<\/span> ']]\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">O exemplo a seguir mostra como usar essa sintaxe na pr\u00e1tica.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo: use description() no Pandas para calcular apenas a m\u00e9dia e o padr\u00e3o<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Suponha que temos o seguinte DataFrame do pandas que cont\u00e9m informa\u00e7\u00f5es sobre v\u00e1rios jogadores de basquete:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#createDataFrame\n<\/span>df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">team<\/span> ': ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H'],\n                   ' <span style=\"color: #ff0000;\">points<\/span> ': [18, 22, 19, 14, 14, 11, 20, 28],\n                   ' <span style=\"color: #ff0000;\">assists<\/span> ': [5, 7, 7, 9, 12, 9, 9, 4],\n                   ' <span style=\"color: #ff0000;\">rebounds<\/span> ': [11, 8, 10, 6, 6, 5, 9, 12]})\n\n<span style=\"color: #008080;\">#view DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> (df)\n\n  team points assists rebounds\n0 A 18 5 11\n1 B 22 7 8\n2 C 19 7 10\n3 D 14 9 6\n4 E 14 12 6\n5 F 11 9 5\n6 G 20 9 9\n7:28 4 12\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Se usarmos a <strong>fun\u00e7\u00e3oscribe()<\/strong> , podemos calcular estat\u00edsticas descritivas para cada vari\u00e1vel num\u00e9rica no DataFrame:<\/span><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#calculate descriptive statistics for each numeric variable\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">describe<\/span> ()\n<\/span>\n<\/span>points assists rebounds\ncount 8.000000 8.00000 8.000000\nmean 18.250000 7.75000 8.375000\nstd 5.365232 2.54951 2.559994\nmin 11.000000 4.00000 5.000000\n25% 14,000000 6,50000 6,000000\n50% 18.500000 8.00000 8.500000\n75% 20.500000 9.00000 10.250000\nmax 28.000000 12.00000 12.000000<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">No entanto, podemos usar a seguinte sintaxe para calcular apenas a <a href=\"https:\/\/statorials.org\/pt\/importancia-da-media\/\" target=\"_blank\" rel=\"noopener\">m\u00e9dia<\/a> e <a href=\"https:\/\/statorials.org\/pt\/por-que-o-desvio-padrao-e-importante\/\" target=\"_blank\" rel=\"noopener\">o desvio padr\u00e3o<\/a> de cada vari\u00e1vel num\u00e9rica:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#only calculate mean and standard deviation of each numeric variable<\/span>\ndf. <span style=\"color: #3366ff;\">describe<\/span> (). <span style=\"color: #3366ff;\">loc<\/span> [[' <span style=\"color: #ff0000;\">mean<\/span> ', ' <span style=\"color: #ff0000;\">std<\/span> ']]\n\n           points assists rebounds\nmean 18.250000 7.75000 8.375000\nstd 5.365232 2.54951 2.559994\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Observe que a sa\u00edda inclui apenas a m\u00e9dia e o desvio padr\u00e3o de cada vari\u00e1vel num\u00e9rica.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe que a fun\u00e7\u00e3o <strong>descreva()<\/strong> ainda calculou cada estat\u00edstica descritiva como antes, mas usamos a fun\u00e7\u00e3o <strong>loc<\/strong> para selecionar apenas as linhas denominadas <strong>m\u00e9dia<\/strong> e <strong>padr\u00e3o<\/strong> na sa\u00edda.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Relacionado:<\/strong> <a href=\"https:\/\/statorials.org\/pt\/pandas-loc-vs-iloc\/\" target=\"_blank\" rel=\"noopener\">Pandas loc vs iloc: qual a diferen\u00e7a?<\/a><\/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 realizar outras opera\u00e7\u00f5es comuns em pandas:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/pandas-groupby-descrever\/\" target=\"_blank\" rel=\"noopener\">Pandas: como usar description() por grupo<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/pandas-descrevem-percentis\/\" target=\"_blank\" rel=\"noopener\">Pandas: como usar description() com percentis espec\u00edficos<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/pandas-nao-descrevem-notacao-cientifica\/\" target=\"_blank\" rel=\"noopener\">Pandas: como usar description() e remover a nota\u00e7\u00e3o cient\u00edfica<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar a fun\u00e7\u00e3o description() para gerar estat\u00edsticas descritivas para vari\u00e1veis em um DataFrame do pandas. Por padr\u00e3o, a fun\u00e7\u00e3o descreva() calcula as seguintes m\u00e9tricas para cada vari\u00e1vel num\u00e9rica em um DataFrame: contagem (n\u00famero de valores) m\u00e9dia (valor m\u00e9dio) padr\u00e3o (desvio padr\u00e3o) min (valor m\u00ednimo) 25% (percentil 25) 50% (percentil 50) 75% (percentil 75) [&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-4320","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>Pandas: Como usar description() apenas para M\u00e9dia e Padr\u00e3o \u2013 Estatoriais<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o description() em pandas para calcular apenas a m\u00e9dia e o desvio padr\u00e3o das vari\u00e1veis.\" \/>\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\/pandas-descrevem-apenas-padrao-medio\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pandas: Como usar description() apenas para M\u00e9dia e Padr\u00e3o \u2013 Estatoriais\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o description() em pandas para calcular apenas a m\u00e9dia e o desvio padr\u00e3o das vari\u00e1veis.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/pandas-descrevem-apenas-padrao-medio\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-12T00:55:26+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\/pandas-descrevem-apenas-padrao-medio\/\",\"url\":\"https:\/\/statorials.org\/pt\/pandas-descrevem-apenas-padrao-medio\/\",\"name\":\"Pandas: Como usar description() apenas para M\u00e9dia e Padr\u00e3o \u2013 Estatoriais\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-12T00:55:26+00:00\",\"dateModified\":\"2023-07-12T00:55:26+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como usar a fun\u00e7\u00e3o description() em pandas para calcular apenas a m\u00e9dia e o desvio padr\u00e3o das vari\u00e1veis.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/pandas-descrevem-apenas-padrao-medio\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/pandas-descrevem-apenas-padrao-medio\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/pandas-descrevem-apenas-padrao-medio\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pandas: como usar description() apenas para m\u00e9dia e padr\u00e3o\"}]},{\"@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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