{"id":2050,"date":"2023-07-23T22:28:51","date_gmt":"2023-07-23T22:28:51","guid":{"rendered":"https:\/\/statorials.org\/pt\/pandas-value_counts\/"},"modified":"2023-07-23T22:28:51","modified_gmt":"2023-07-23T22:28:51","slug":"pandas-value_counts","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/pandas-value_counts\/","title":{"rendered":"Como usar a fun\u00e7\u00e3o value_counts() do pandas (com exemplos)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Voc\u00ea pode usar a fun\u00e7\u00e3o <strong>value_counts()<\/strong> para contar a frequ\u00eancia de valores \u00fanicos em uma s\u00e9rie de pandas.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Esta fun\u00e7\u00e3o usa a seguinte sintaxe b\u00e1sica:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> ()\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar essa sintaxe na pr\u00e1tica.<\/span><\/p>\n<h3> <strong><span style=\"color: #000000;\"><span style=\"color: #000000;\">Exemplo 1: Frequ\u00eancia de contagem de valores \u00fanicos<\/span><\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como contar ocorr\u00eancias de valores \u00fanicos em uma s\u00e9rie 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;\">#create pandas Series\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> ()\n\n3 4\n4 2\n7 2\n8 1\n9 1\ndtype: int64<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isso nos diz:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O valor 3 aparece <strong>4<\/strong> vezes.<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor 4 aparece <strong>duas vezes<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor 7 aparece <strong>duas vezes<\/strong> .<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">E assim por diante.<\/span><\/p>\n<h3> <strong><span style=\"color: #000000;\">Exemplo 2: frequ\u00eancia de contagem de valores \u00fanicos (incluindo NaN)<\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Por padr\u00e3o, a fun\u00e7\u00e3o <strong>value_counts()<\/strong> n\u00e3o exibe a frequ\u00eancia dos valores NaN.<\/span><\/p>\n<p> <span style=\"color: #000000;\">No entanto, voc\u00ea pode usar o argumento <strong>dropna<\/strong> para exibir a frequ\u00eancia dos valores NaN:<\/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<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\">#create pandas Series with some NaN values\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9, np.nan, np.nan])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series, including NaNs\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> (dropna= <span style=\"color: #008000;\">False<\/span> )\n\n3.0 4\n4.0 2\n7.0 2\nNaN2\n8.0 1\n9.0 1\ndtype: int64<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 3: conte a frequ\u00eancia relativa de valores \u00fanicos<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar o argumento <strong>normalize<\/strong> para contar a frequ\u00eancia relativa de valores \u00fanicos em uma s\u00e9rie 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;\">#create pandas Series\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> (normalize= <span style=\"color: #008000;\">True<\/span> )\n\n3 0.4\n4 0.2\n7 0.2\n8 0.1\n9 0.1\ndtype:float64<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isso nos diz:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O valor 3 representa <strong>40%<\/strong> de todos os valores da s\u00e9rie.<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor 4 representa <strong>20%<\/strong> de todos os valores da s\u00e9rie.<\/span><\/li>\n<li> <span style=\"color: #000000;\">O valor 7 representa <strong>20%<\/strong> de todos os valores da s\u00e9rie.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">E assim por diante.<\/span><\/p>\n<h3> <strong>Exemplo 4: Contando frequ\u00eancia em compartimentos<\/strong><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar o argumento <strong>bins<\/strong> para contar a frequ\u00eancia de valores em uma s\u00e9rie de pandas que caem em compartimentos de tamanho igual:<\/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;\">#create pandas Series\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> (bins= <span style=\"color: #008000;\">3<\/span> )\n\n(3.0, 5.0] 6\n(5.0, 7.0] 2\n(7.0, 9.0] 2\ndtype: int64\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isso nos diz:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Existem <strong>6<\/strong> valores entre 3 e 5.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Existem <strong>2<\/strong> valores entre 5 e 7.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Existem <strong>2<\/strong> valores entre 7 e 9.<\/span><\/li>\n<\/ul>\n<h3> <strong><span style=\"color: #000000;\">Exemplo 5: Conte a frequ\u00eancia dos valores no Pandas DataFrame<\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Tamb\u00e9m podemos usar a fun\u00e7\u00e3o <strong>value_counts()<\/strong> para calcular a frequ\u00eancia de valores \u00fanicos em uma coluna espec\u00edfica de um 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;\">points<\/span> ': [9, 9, 9, 10, 10, 13, 15, 22],\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<span style=\"color: #008080;\">#count occurrences of unique values in 'points' column\n<\/span>df[' <span style=\"color: #ff0000;\">points<\/span> ']. <span style=\"color: #3366ff;\">value_counts<\/span> ()\n\n9 3\n10 2\n13 1\n15 1\n22 1\nName: points, dtype: int64<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir explicam como usar outras fun\u00e7\u00f5es comuns em pandas:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/pandas-descrevem\/\" target=\"_blank\" rel=\"noopener\">Como usar a fun\u00e7\u00e3o description() no Pandas<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/estatologia-explica-conceitos-de-forma-simples-e-direta-facilitamos-o-aprendizado-de-estatistica\/\" target=\"_blank\" rel=\"noopener\">Como contar o n\u00famero de linhas no Pandas<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/grupo-de-pandas-por-numero\/\" target=\"_blank\" rel=\"noopener\">Como contar avistamentos de grupos em pandas<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar a fun\u00e7\u00e3o value_counts() para contar a frequ\u00eancia de valores \u00fanicos em uma s\u00e9rie de pandas. Esta fun\u00e7\u00e3o usa a seguinte sintaxe b\u00e1sica: my_series. value_counts () Os exemplos a seguir mostram como usar essa sintaxe na pr\u00e1tica. Exemplo 1: Frequ\u00eancia de contagem de valores \u00fanicos O c\u00f3digo a seguir mostra como contar ocorr\u00eancias [&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-2050","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 usar a fun\u00e7\u00e3o value_counts() do Pandas (com exemplos) \u2013 Estatologia<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o value_counts() em pandas, 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\/pandas-value_counts\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como usar a fun\u00e7\u00e3o value_counts() do Pandas (com exemplos) \u2013 Estatologia\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como usar a fun\u00e7\u00e3o value_counts() em pandas, com v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/pandas-value_counts\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-23T22:28:51+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-value_counts\/\",\"url\":\"https:\/\/statorials.org\/pt\/pandas-value_counts\/\",\"name\":\"Como usar a fun\u00e7\u00e3o value_counts() do Pandas (com exemplos) \u2013 Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-23T22:28:51+00:00\",\"dateModified\":\"2023-07-23T22:28:51+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como usar a fun\u00e7\u00e3o value_counts() em pandas, com v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/pandas-value_counts\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/pandas-value_counts\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/pandas-value_counts\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como usar a fun\u00e7\u00e3o value_counts() do pandas (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. 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