{"id":888,"date":"2023-07-28T10:15:37","date_gmt":"2023-07-28T10:15:37","guid":{"rendered":"https:\/\/statorials.org\/pt\/compare-dois-dataframes-do-pandas\/"},"modified":"2023-07-28T10:15:37","modified_gmt":"2023-07-28T10:15:37","slug":"compare-dois-dataframes-do-pandas","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/compare-dois-dataframes-do-pandas\/","title":{"rendered":"Como comparar dois dataframes no pandas"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Freq\u00fcentemente, voc\u00ea pode estar interessado em comparar os valores entre dois DataFrames do panda para identificar suas semelhan\u00e7as e diferen\u00e7as.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este tutorial explica como fazer isso.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo: Comparando dois DataFrames em Pandas<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos os dois DataFrames panda a seguir, cada um contendo dados de quatro jogadores de basquete:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #107d3f;\">import<\/span> pandas <span style=\"color: #107d3f;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#define DataFrame 1<\/span>\ndf1 = pd. <span style=\"color: #0000ff;\">DataFrame<\/span> ({'player': ['A', 'B', 'C', 'D'],\n                   'points': [12, 15, 17, 24],\n                   'assists': [4, 6, 7, 8]})\ndf1\n\n\n        player points assists\n0 to 12 4\n1 B 15 6\n2 C 17 7\n3 D 24 88\n\n<span style=\"color: #008080;\">#define DataFrame 2\n<\/span>df2 = pd. <span style=\"color: #0000ff;\">DataFrame<\/span> ({'player': ['A', 'B', 'C', 'D'],\n                    'points': [12, 24, 26, 29],\n                    'assists': [7, 8, 10, 13]})\ndf2\n\n\tplayer points assists\n0 to 12 7\n1 B 24 8\n2 C 26 10\n3 D 29 13\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Exemplo 1: Descubra se os dois DataFrames s\u00e3o iguais.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos primeiro descobrir se os dois DataFrames s\u00e3o id\u00eanticos usando a fun\u00e7\u00e3o <a href=\"https:\/\/pandas.pydata.org\/pandas-docs\/stable\/reference\/api\/pandas.DataFrame.equals.html\" target=\"_blank\" rel=\"noopener\">DataFrame.equals()<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#see if two DataFrames are identical<\/span>\ndf1. <span style=\"color: #0000ff;\">equals<\/span> (df2)\n\nFalse<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Os dois DataFrames n\u00e3o cont\u00eam exatamente os mesmos valores, portanto esta fun\u00e7\u00e3o retorna corretamente <strong>False<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Exemplo 2: Encontre as diferen\u00e7as nas estat\u00edsticas dos jogadores entre os dois DataFrames.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos encontrar as diferen\u00e7as entre as assist\u00eancias e pontos de cada jogador usando a fun\u00e7\u00e3o pandas <a href=\"https:\/\/pandas.pydata.org\/pandas-docs\/stable\/reference\/api\/pandas.DataFrame.subtract.html\" target=\"_blank\" rel=\"noopener\">subtract()<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#subtract df1 from df2<\/span>\ndf2. <span style=\"color: #0000ff;\">set_index<\/span> ('player'). <span style=\"color: #0000ff;\">subtract<\/span> (df1.set_index('player'))\n\n\tassist points\nplayer\t\t\nAt 0 3\nB 9 2\nC 9 3\nD 5 5\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">A maneira de interpretar isso \u00e9:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">O jogador A teve o mesmo n\u00famero de pontos em ambos os DataFrames, mas teve mais 3 assist\u00eancias no DataFrame 2.<\/span><\/li>\n<li> <span style=\"color: #000000;\">O jogador B teve mais 9 pontos e mais 2 assist\u00eancias no DataFrame 2 em compara\u00e7\u00e3o com o DataFrame 1.<\/span><\/li>\n<li> <span style=\"color: #000000;\">O jogador C teve mais 9 pontos e mais 3 assist\u00eancias no DataFrame 2 em compara\u00e7\u00e3o com o DataFrame 1.<\/span><\/li>\n<li> <span style=\"color: #000000;\">O Jogador D teve mais 5 pontos e mais 5 assist\u00eancias no DataFrame 2 em compara\u00e7\u00e3o com o DataFrame 1.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>Exemplo 3: Encontre todas as linhas que existem apenas em um \u00fanico DataFrame.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos usar o c\u00f3digo a seguir para obter uma lista completa de linhas que aparecem apenas em um \u00fanico DataFrame:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#outer merge the two DataFrames, adding an indicator column called 'Exist'<\/span>\ndiff_df = pd. <span style=\"color: #0000ff;\">merge<\/span> (df1, df2, how=' <span style=\"color: #008000;\">outer<\/span> ', indicator=' <span style=\"color: #008000;\">Exist<\/span> ')\n\n<span style=\"color: #008080;\">#find which rows don't exist in both DataFrames\n<\/span>diff_df = diff_df. <span style=\"color: #0000ff;\">loc<\/span> [diff_df[' <span style=\"color: #008000;\">Exist<\/span> '] != ' <span style=\"color: #008000;\">both<\/span> ']\ndiff_df\n\n\tplayer points assists Exist\n0 A 12 4 left_only\n1 B 15 6 left_only\n2 C 17 7 left_only\n3 D 24 8 left_only\n4 A 12 7 right_only\n5 B 24 8 right_only\n6 C 26 10 right_only\n7 D 29 13 right_only\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Neste caso, os dois DataFrames n\u00e3o partilham linhas id\u00eanticas, pelo que existem 8 linhas no total que s\u00f3 aparecem num dos DataFrames.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A coluna denominada \u201cExist\u201d nos informa convenientemente em qual DataFrame cada linha aparece exclusivamente.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Freq\u00fcentemente, voc\u00ea pode estar interessado em comparar os valores entre dois DataFrames do panda para identificar suas semelhan\u00e7as e diferen\u00e7as. Este tutorial explica como fazer isso. Exemplo: Comparando dois DataFrames em Pandas Suponha que temos os dois DataFrames panda a seguir, cada um contendo dados de quatro jogadores de basquete: import pandas as pd #define [&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-888","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 comparar dois DataFrames em Pandas \u2013 Estatologia<\/title>\n<meta name=\"description\" content=\"Uma explica\u00e7\u00e3o simples sobre como comparar valores entre dois DataFrames no Pandas.\" \/>\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\/compare-dois-dataframes-do-pandas\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como comparar dois DataFrames em Pandas \u2013 Estatologia\" \/>\n<meta property=\"og:description\" content=\"Uma explica\u00e7\u00e3o simples sobre como comparar valores entre dois DataFrames no Pandas.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/compare-dois-dataframes-do-pandas\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T10:15:37+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\/compare-dois-dataframes-do-pandas\/\",\"url\":\"https:\/\/statorials.org\/pt\/compare-dois-dataframes-do-pandas\/\",\"name\":\"Como comparar dois DataFrames em Pandas \u2013 Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-28T10:15:37+00:00\",\"dateModified\":\"2023-07-28T10:15:37+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Uma explica\u00e7\u00e3o simples sobre como comparar valores entre dois DataFrames no Pandas.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/compare-dois-dataframes-do-pandas\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/compare-dois-dataframes-do-pandas\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/compare-dois-dataframes-do-pandas\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como comparar dois dataframes no pandas\"}]},{\"@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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