{"id":974,"date":"2023-07-28T03:11:49","date_gmt":"2023-07-28T03:11:49","guid":{"rendered":"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/"},"modified":"2023-07-28T03:11:49","modified_gmt":"2023-07-28T03:11:49","slug":"pojedyncze-pandy-wiele-kolumn","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/","title":{"rendered":"Jak znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach w pandach"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Cz\u0119sto mo\u017cesz chcie\u0107 znale\u017a\u0107 wszystkie unikalne warto\u015bci w wielu kolumnach w ramce DataFrame pandy. Na szcz\u0119\u015bcie mo\u017cna to \u0142atwo zrobi\u0107, korzystaj\u0105c z funkcji pandas <a href=\"https:\/\/pandas.pydata.org\/docs\/reference\/api\/pandas.unique.html\" target=\"_blank\" rel=\"noopener noreferrer\">Unique()<\/a> po\u0142\u0105czonej z funkcj\u0105 <a href=\"https:\/\/pandas.pydata.org\/pandas-docs\/stable\/reference\/api\/pandas.Series.ravel.html\" target=\"_blank\" rel=\"noopener noreferrer\">ravel()<\/a> :<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>unikalne()<\/strong> : zwraca unikalne warto\u015bci w kolejno\u015bci wyst\u0119powania.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>ravel():<\/strong> zwraca seri\u0119 sp\u0142aszczonych danych.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy na przyk\u0142ad, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych pand:<\/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;\">#createDataFrame<\/span>\ndf = pd.DataFrame({'col1': ['a', 'b', 'c', 'd', 'e'],\n                   'col2': ['a', 'c', 'e', 'f', 'g'],\n                   'col3': [11, 8, 10, 6, 6]})\n\n<span style=\"color: #008080;\">#view DataFrame<\/span> \nprint(df)\n\n  col1 col2 col3\n0 aa 11\n1 bc 8\n2 this 10\n3 df 6\n4 eg 6\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Zwraca tablic\u0119 unikalnych warto\u015bci<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak znale\u017a\u0107 unikalne warto\u015bci w <strong>col1<\/strong> i <strong>col2<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>p.d. <span style=\"color: #3366ff;\">unique<\/span> (df[[' <span style=\"color: #008000;\">col1<\/span> ', ' <span style=\"color: #008000;\">col2<\/span> ']]. <span style=\"color: #3366ff;\">values<\/span> . <span style=\"color: #3366ff;\">ravel<\/span> ())\n\narray(['a', 'b', 'c', 'e', 'd', 'f', 'g'], dtype=object)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku widzimy, \u017ce w tych dw\u00f3ch kolumnach znajduje si\u0119 <strong>7<\/strong> unikalnych warto\u015bci: <strong>a, b, c, d, e, f, g<\/strong> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Zwr\u00f3\u0107 ramk\u0119 danych o unikalnych warto\u015bciach<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Je\u015bli chcesz zwr\u00f3ci\u0107 te warto\u015bci jako DataFrame zamiast tablicy, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cego kodu:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>unique = pd. <span style=\"color: #3366ff;\">unique<\/span> (df[[' <span style=\"color: #008000;\">col1<\/span> ', ' <span style=\"color: #008000;\">col2<\/span> ']]. <span style=\"color: #3366ff;\">values<\/span> . <span style=\"color: #3366ff;\">ravel<\/span> ())\n\np.d. <span style=\"color: #3366ff;\">DataFrame<\/span> (unique)\n\n\t0\n0 a\n1b\n2 tbsp\n3rd\n4 d\n5f\n6g\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Zwraca liczb\u0119 unikalnych warto\u015bci<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Je\u015bli chcesz tylko pozna\u0107 liczb\u0119 unikalnych warto\u015bci w wielu kolumnach, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cego kodu:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>unique = pd. <span style=\"color: #3366ff;\">unique<\/span> (df[[' <span style=\"color: #008000;\">col1<\/span> ', ' <span style=\"color: #008000;\">col2<\/span> ']]. <span style=\"color: #3366ff;\">values<\/span> . <span style=\"color: #3366ff;\">ravel<\/span> ())\n\n<span style=\"color: #3366ff;\">len<\/span> (unique)\n7<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To m\u00f3wi nam, \u017ce w tych dw\u00f3ch kolumnach znajduje si\u0119 <strong>7<\/strong> unikalnych warto\u015bci.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pl\/pandy-\u0142acza-wiele-kolumn\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak po\u0142\u0105czy\u0107 ramki danych Pandas w wielu kolumnach<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pandy-filtruja-wiele-warunkow\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak filtrowa\u0107 ramk\u0119 danych Pandas pod wieloma warunkami<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cz\u0119sto mo\u017cesz chcie\u0107 znale\u017a\u0107 wszystkie unikalne warto\u015bci w wielu kolumnach w ramce DataFrame pandy. Na szcz\u0119\u015bcie mo\u017cna to \u0142atwo zrobi\u0107, korzystaj\u0105c z funkcji pandas Unique() po\u0142\u0105czonej z funkcj\u0105 ravel() : unikalne() : zwraca unikalne warto\u015bci w kolejno\u015bci wyst\u0119powania. ravel(): zwraca seri\u0119 sp\u0142aszczonych danych. Za\u0142\u00f3\u017cmy na przyk\u0142ad, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych pand: import pandas as [&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-974","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 znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach w Pandach \u2013 Statorials<\/title>\n<meta name=\"description\" content=\"Proste wyja\u015bnienie, jak znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach w pandzie DataFrame, w tym kilka przyk\u0142ad\u00f3w.\" \/>\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\/pojedyncze-pandy-wiele-kolumn\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach w Pandach \u2013 Statorials\" \/>\n<meta property=\"og:description\" content=\"Proste wyja\u015bnienie, jak znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach w pandzie DataFrame, w tym kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T03:11:49+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=\"1 minuta\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/\",\"url\":\"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/\",\"name\":\"Jak znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach w Pandach \u2013 Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-28T03:11:49+00:00\",\"dateModified\":\"2023-07-28T03:11:49+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"Proste wyja\u015bnienie, jak znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach w pandzie DataFrame, w tym kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/pojedyncze-pandy-wiele-kolumn\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak znale\u017a\u0107 unikalne warto\u015bci w wielu kolumnach 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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