{"id":887,"date":"2023-07-28T10:15:37","date_gmt":"2023-07-28T10:15:37","guid":{"rendered":"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/"},"modified":"2023-07-28T10:15:37","modified_gmt":"2023-07-28T10:15:37","slug":"porownaj-dwie-ramki-danych-pand","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/","title":{"rendered":"Jak por\u00f3wna\u0107 dwie ramki danych w pandach"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Cz\u0119sto mo\u017cesz by\u0107 zainteresowany por\u00f3wnaniem warto\u015bci mi\u0119dzy dwiema ramkami DataFrame panda, aby dostrzec ich podobie\u0144stwa i r\u00f3\u017cnice.<\/span><\/p>\n<p> <span style=\"color: #000000;\">W tym samouczku wyja\u015bniono, jak to zrobi\u0107.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad: por\u00f3wnanie dw\u00f3ch ramek danych w Pandach<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy, \u017ce mamy dwie ramki danych pandy, z kt\u00f3rych ka\u017cda zawiera dane dotycz\u0105ce czterech koszykarzy:<\/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>Przyk\u0142ad 1: Dowiedz si\u0119, czy dwie ramki danych s\u0105 takie same.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy najpierw sprawdzi\u0107, czy obie ramki DataFrame s\u0105 identyczne, korzystaj\u0105c z funkcji <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;\">Dwie ramki danych nie zawieraj\u0105 dok\u0142adnie tych samych warto\u015bci, wi\u0119c ta funkcja poprawnie zwraca <strong>False<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Znajd\u017a r\u00f3\u017cnice w statystykach graczy pomi\u0119dzy dwiema ramkami DataFrame.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy znale\u017a\u0107 r\u00f3\u017cnice pomi\u0119dzy asystami i punktami ka\u017cdego gracza za pomoc\u0105 funkcji 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;\">Spos\u00f3b interpretacji tego jest nast\u0119puj\u0105cy:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Gracz A mia\u0142 t\u0119 sam\u0105 liczb\u0119 punkt\u00f3w w obu DataFrame, ale mia\u0142 3 asysty wi\u0119cej w DataFrame 2.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Gracz B mia\u0142 9 punkt\u00f3w wi\u0119cej i 2 asysty wi\u0119cej w DataFrame 2 w por\u00f3wnaniu do DataFrame 1.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Gracz C mia\u0142 9 punkt\u00f3w wi\u0119cej i 3 asysty wi\u0119cej w DataFrame 2 w por\u00f3wnaniu do DataFrame 1.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Gracz D mia\u0142 5 punkt\u00f3w wi\u0119cej i 5 asyst wi\u0119cej w DataFrame 2 w por\u00f3wnaniu do DataFrame 1.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: Znajd\u017a wszystkie wiersze, kt\u00f3re istniej\u0105 tylko w jednej ramce danych.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 poni\u017cszego kodu, aby uzyska\u0107 pe\u0142n\u0105 list\u0119 wierszy, kt\u00f3re pojawiaj\u0105 si\u0119 tylko w jednej ramce 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;\">W tym przypadku dwie ramki danych nie maj\u0105 wsp\u00f3lnych wierszy, wi\u0119c \u0142\u0105cznie jest 8 wierszy, kt\u00f3re pojawiaj\u0105 si\u0119 tylko w jednej ramce danych.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Kolumna oznaczona \u201eIstnieje\u201d w wygodny spos\u00f3b informuje nas, w kt\u00f3rej ramce danych pojawia si\u0119 ka\u017cdy wiersz.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cz\u0119sto mo\u017cesz by\u0107 zainteresowany por\u00f3wnaniem warto\u015bci mi\u0119dzy dwiema ramkami DataFrame panda, aby dostrzec ich podobie\u0144stwa i r\u00f3\u017cnice. W tym samouczku wyja\u015bniono, jak to zrobi\u0107. Przyk\u0142ad: por\u00f3wnanie dw\u00f3ch ramek danych w Pandach Za\u0142\u00f3\u017cmy, \u017ce mamy dwie ramki danych pandy, z kt\u00f3rych ka\u017cda zawiera dane dotycz\u0105ce czterech koszykarzy: import pandas as pd #define DataFrame 1 df1 = [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-887","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Jak por\u00f3wna\u0107 dwie ramki danych w Pandach \u2013 Statologia<\/title>\n<meta name=\"description\" content=\"Proste wyja\u015bnienie, jak por\u00f3wna\u0107 warto\u015bci pomi\u0119dzy dwiema ramkami DataFrame w Pandach.\" \/>\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\/pl\/porownaj-dwie-ramki-danych-pand\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak por\u00f3wna\u0107 dwie ramki danych w Pandach \u2013 Statologia\" \/>\n<meta property=\"og:description\" content=\"Proste wyja\u015bnienie, jak por\u00f3wna\u0107 warto\u015bci pomi\u0119dzy dwiema ramkami DataFrame w Pandach.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/\" \/>\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=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/\",\"url\":\"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/\",\"name\":\"Jak por\u00f3wna\u0107 dwie ramki danych w Pandach \u2013 Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-28T10:15:37+00:00\",\"dateModified\":\"2023-07-28T10:15:37+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"Proste wyja\u015bnienie, jak por\u00f3wna\u0107 warto\u015bci pomi\u0119dzy dwiema ramkami DataFrame w Pandach.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/porownaj-dwie-ramki-danych-pand\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak por\u00f3wna\u0107 dwie ramki danych w pandach\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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