{"id":4313,"date":"2023-07-12T02:04:35","date_gmt":"2023-07-12T02:04:35","guid":{"rendered":"https:\/\/statorials.org\/pt\/grupos-de-pandas-por-tamanho\/"},"modified":"2023-07-12T02:04:35","modified_gmt":"2023-07-12T02:04:35","slug":"grupos-de-pandas-por-tamanho","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/grupos-de-pandas-por-tamanho\/","title":{"rendered":"Pandas: como usar groupby() com size()"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Voc\u00ea pode usar os seguintes m\u00e9todos com as fun\u00e7\u00f5es <strong>groupby()<\/strong> e <strong>size()<\/strong> no pandas para contar o n\u00famero de ocorr\u00eancias por grupo:<\/span><\/p>\n<p> <strong><span style=\"color: #000000;\">M\u00e9todo 1: contar ocorr\u00eancias agrupadas por uma vari\u00e1vel<\/span><\/strong><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">groupby<\/span> (' <span style=\"color: #ff0000;\">var1<\/span> '). <span style=\"color: #3366ff;\">size<\/span> ()\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 2: contar ocorr\u00eancias agrupadas por m\u00faltiplas vari\u00e1veis<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">var1<\/span> ', ' <span style=\"color: #ff0000;\">var2<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> ()<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 3: Contar ocorr\u00eancias agrupadas por m\u00faltiplas vari\u00e1veis e ordenadas por n\u00famero<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">var1<\/span> ', ' <span style=\"color: #ff0000;\">var2<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> (). <span style=\"color: #3366ff;\">sort_values<\/span> (ascending= <span style=\"color: #008000;\">False<\/span> )<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar cada m\u00e9todo na pr\u00e1tica com o seguinte DataFrame do pandas:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <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', 'A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'B'],\n                   ' <span style=\"color: #ff0000;\">position<\/span> ': ['G', 'G', 'F', 'F', 'F', 'G', 'G', 'G', 'G', 'F'],\n                   ' <span style=\"color: #ff0000;\">points<\/span> ': [15, 22, 24, 25, 20, 35, 34, 19, 14, 12]})\n\n<span style=\"color: #008080;\">#view DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> (df)\n\n  team position points\n0 AG 15\n1 AG 22\n2 AF 24\n3 AF 25\n4 AF 20\n5 BG 35\n6 BG 34\n7 BG 19\n8 BG 14\n9 BF 12<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo 1: contar ocorr\u00eancias agrupadas por uma vari\u00e1vel<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar as fun\u00e7\u00f5es <strong>groupby()<\/strong> e <strong>size()<\/strong> para contar ocorr\u00eancias de valores na coluna <strong>team<\/strong> :<\/span><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count occurrences of each value in team column\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">groupby<\/span> (' <span style=\"color: #ff0000;\">team<\/span> '). <span style=\"color: #3366ff;\">size<\/span> ()\n\nteam\nAT 5\nB5\ndtype: int64\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Pelo resultado, podemos ver que os valores A e B aparecem <strong>5<\/strong> vezes na coluna <strong>da equipe<\/strong> .<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo 2:<\/strong><\/span> <span style=\"color: #000000;\"><strong>Contar ocorr\u00eancias agrupadas por m\u00faltiplas vari\u00e1veis<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar as fun\u00e7\u00f5es <strong>groupby()<\/strong> e <strong>size()<\/strong> para contar ocorr\u00eancias de valores para cada combina\u00e7\u00e3o de valores nas colunas <strong>equipe<\/strong> e <strong>posi\u00e7\u00e3o<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count occurrences of values for each combination of team and position\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">team<\/span> ', ' <span style=\"color: #ff0000;\">position<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> ()\n\nteam position\nAF3\n      G2\nBF 1\n      G4\ndtype: int64\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Pelo resultado podemos ver:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">A equipe A e a posi\u00e7\u00e3o F aparecem <strong>3<\/strong> vezes.<\/span><\/li>\n<li> <span style=\"color: #000000;\">A equipe A e a posi\u00e7\u00e3o G aparecem <strong>duas vezes<\/strong> .<\/span><\/li>\n<\/ul>\n<p> E assim por diante.<\/p>\n<h2> <span style=\"color: #000000;\"><strong>Exemplo 3:<\/strong><\/span> <span style=\"color: #000000;\"><strong>contar ocorr\u00eancias agrupadas por diversas vari\u00e1veis e ordenar<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar as fun\u00e7\u00f5es <strong>groupby()<\/strong> e <strong>size()<\/strong> para contar ocorr\u00eancias de valores para cada combina\u00e7\u00e3o de valores nas colunas <strong>equipe<\/strong> e <strong>posi\u00e7\u00e3o<\/strong> e, em seguida, classificar por contagem:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count occurrences for each combination of team and position and sort\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">team<\/span> ', ' <span style=\"color: #ff0000;\">position<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> (). <span style=\"color: #3366ff;\">sort_values<\/span> (ascending= <span style=\"color: #008000;\">False<\/span> )\n\nteam position\nBG 4\nAF3\n      G2\nBF 1\ndtype: int64\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">A sa\u00edda exibe a contagem de cada combina\u00e7\u00e3o de valores de <strong>equipe<\/strong> e <strong>posi\u00e7\u00e3o<\/strong> , classificada por contagem em ordem decrescente.<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : Para classificar por n\u00famero em ordem crescente, basta remover <strong>ascendente=False<\/strong> na fun\u00e7\u00e3o <strong>sort_values()<\/strong> .<\/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 tarefas comuns em pandas:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/contagem-de-grupo-de-pandas-unica\/\" target=\"_blank\" rel=\"noopener\">Como contar valores \u00fanicos usando Pandas GroupBy<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/pandas-groupby-aplicar\/\" target=\"_blank\" rel=\"noopener\">Como aplicar uma fun\u00e7\u00e3o ao Pandas Groupby<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/grafico-de-barra-de-grupo-de-pandas\/\" target=\"_blank\" rel=\"noopener\">Como criar um gr\u00e1fico de barras do Pandas GroupBy<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar os seguintes m\u00e9todos com as fun\u00e7\u00f5es groupby() e size() no pandas para contar o n\u00famero de ocorr\u00eancias por grupo: M\u00e9todo 1: contar ocorr\u00eancias agrupadas por uma vari\u00e1vel df. groupby (&#8216; var1 &#8216;). size () M\u00e9todo 2: contar ocorr\u00eancias agrupadas por m\u00faltiplas vari\u00e1veis df. groupby ([&#8216; var1 &#8216;, &#8216; var2 &#8216;]). size () [&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-4313","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 groupby() com size() \u2013 Estatoriais<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o pandas groupby() com a fun\u00e7\u00e3o size() para contar o n\u00famero de ocorr\u00eancias por grupo.\" \/>\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\/grupos-de-pandas-por-tamanho\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pandas: Como usar groupby() com size() \u2013 Estatoriais\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o pandas groupby() com a fun\u00e7\u00e3o size() para contar o n\u00famero de ocorr\u00eancias por grupo.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/grupos-de-pandas-por-tamanho\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-12T02:04:35+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\/grupos-de-pandas-por-tamanho\/\",\"url\":\"https:\/\/statorials.org\/pt\/grupos-de-pandas-por-tamanho\/\",\"name\":\"Pandas: Como usar groupby() com size() \u2013 Estatoriais\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-12T02:04:35+00:00\",\"dateModified\":\"2023-07-12T02:04:35+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como usar a fun\u00e7\u00e3o pandas groupby() com a fun\u00e7\u00e3o size() para contar o n\u00famero de ocorr\u00eancias por grupo.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/grupos-de-pandas-por-tamanho\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/grupos-de-pandas-por-tamanho\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/grupos-de-pandas-por-tamanho\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pandas: como usar groupby() com size()\"}]},{\"@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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