{"id":1232,"date":"2023-07-27T04:53:06","date_gmt":"2023-07-27T04:53:06","guid":{"rendered":"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/"},"modified":"2023-07-27T04:53:06","modified_gmt":"2023-07-27T04:53:06","slug":"upusc-pandy-indeksowe","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/","title":{"rendered":"Jak usun\u0105\u0107 kolumn\u0119 indeksu w pandach (z przyk\u0142adami)"},"content":{"rendered":"

<\/p>\n

\n

Czasami mo\u017cesz chcie\u0107 usun\u0105\u0107 kolumn\u0119 indeksu z ramki DataFrame pandy w Pythonie.<\/span><\/p>\n

Poniewa\u017c ramki danych i serie pand zawsze maj\u0105 indeks, w rzeczywisto\u015bci nie mo\u017cna go usun\u0105\u0107<\/em> , ale mo\u017cna go zresetowa\u0107, u\u017cywaj\u0105c nast\u0119puj\u0105cego fragmentu kodu:<\/span><\/p>\n

 df. reset_index<\/span> (drop= True<\/span> , place= True<\/span> )\n<\/strong><\/pre>\n
 Za\u0142\u00f3\u017cmy na przyk\u0142ad, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych pand z indeksem literowym:<\/span><\/p>\n
 import<\/span> pandas as<\/span> pd\n\n#createDataFrame\n<\/span>df = pd.DataFrame({'points': [25, 12, 15, 14, 19, 23, 25, 29],\n                   'assists': [5, 7, 7, 9, 12, 9, 9, 4],\n                   'rebounds': [11, 8, 10, 6, 6, 5, 9, 12]})\n\n#set index of DataFrame to be random letters\n<\/span>df = df. set_index<\/span> ([pd. Index<\/span> (['a', 'b', 'd', 'g', 'h', 'm', 'n', 'z'])])\n\n#display DataFrame\n<\/span>df\n\n        points assists rebounds\na 25 5 11\nb 12 7 8\nd 15 7 10\ng 14 9 6\nh 19 12 6\nm 23 9 5\nn 25 9 9\nz 29 4 12\n<\/strong><\/pre>\n
 Mo\u017cemy u\u017cy\u0107 funkcji reset_index()<\/a> , aby zresetowa\u0107 indeks tak, aby by\u0142 to sekwencyjna lista liczb:<\/span><\/p>\n
 #reset indexes\n<\/span>df. reset_index<\/span> (drop= True<\/span> , place= True<\/span> )\n\n#display DataFrame<\/span>\ndf\n\n        points assists rebounds\n0 25 5 11\n1 12 7 8\n2 15 7 10\n3 14 9 6\n4 19 12 6\n5 23 9 5\n6 25 9 9\n7 29 4 12\n<\/strong><\/pre>\n
 Zauwa\u017c, \u017ce indeks jest teraz list\u0105 liczb od 0 do 7.<\/span><\/p>\n
 Jak wspomniano wcze\u015bniej, indeks nie jest w rzeczywisto\u015bci kolumn\u0105. Kiedy wi\u0119c u\u017cyjemy polecenia kszta\u0142tu<\/strong> , zobaczymy, \u017ce ramka DataFrame ma 8 wierszy i 3 kolumny (zamiast 4 kolumn):<\/span><\/p>\n
 #find number of rows and columns in DataFrame\n<\/span>df. shape\n\n(8, 3)\n<\/span><\/span><\/strong><\/pre>\n
 Bonus: usu\u0144 indeks podczas importowania i eksportowania<\/strong><\/span><\/h3>\n
 Cz\u0119sto mo\u017cesz chcie\u0107 zresetowa\u0107 indeks ramki DataFrame pandy po odczytaniu jej z pliku CSV. Mo\u017cesz szybko zresetowa\u0107 indeks podczas<\/em> jego importowania, u\u017cywaj\u0105c nast\u0119puj\u0105cego fragmentu kodu:<\/span><\/p>\n
 df = pd. read_csv<\/span> ('data.csv', index_col= False<\/span> )<\/strong><\/pre>\n
 Mo\u017cesz tak\u017ce upewni\u0107 si\u0119, \u017ce kolumna indeksu nie zostanie zapisana w pliku CSV podczas eksportu, u\u017cywaj\u0105c nast\u0119puj\u0105cego fragmentu kodu:<\/span><\/p>\n
 df. to_csv<\/span> ('data.csv', index= False<\/span> )<\/strong><\/pre>\n
 Dodatkowe zasoby<\/strong><\/span><\/h3>\n
 Jak ustawi\u0107 kolumn\u0119 jako indeks w Pandach<\/a>
 Jak usun\u0105\u0107 wiersze z warto\u015bciami NaN w Pandach<\/a>
 Jak sortowa\u0107 warto\u015bci w Pandas DataFrame<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Czasami mo\u017cesz chcie\u0107 usun\u0105\u0107 kolumn\u0119 indeksu z ramki DataFrame pandy w Pythonie. Poniewa\u017c ramki danych i serie pand zawsze maj\u0105 indeks, w rzeczywisto\u015bci nie mo\u017cna go usun\u0105\u0107 , ale mo\u017cna go zresetowa\u0107, u\u017cywaj\u0105c nast\u0119puj\u0105cego fragmentu kodu: df. reset_index (drop= True , place= True ) Za\u0142\u00f3\u017cmy na przyk\u0142ad, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych pand z indeksem […]<\/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-1232","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nJak usun\u0105\u0107 kolumn\u0119 indeksu w Pandach (z przyk\u0142adami)<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak usun\u0105\u0107 kolumn\u0119 indeksu z ramki DataFrame pandy, podaj\u0105c 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\/upusc-pandy-indeksowe\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak usun\u0105\u0107 kolumn\u0119 indeksu w Pandach (z przyk\u0142adami)\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak usun\u0105\u0107 kolumn\u0119 indeksu z ramki DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T04:53:06+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\/upusc-pandy-indeksowe\/\",\"url\":\"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/\",\"name\":\"Jak usun\u0105\u0107 kolumn\u0119 indeksu w Pandach (z przyk\u0142adami)\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-27T04:53:06+00:00\",\"dateModified\":\"2023-07-27T04:53:06+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak usun\u0105\u0107 kolumn\u0119 indeksu z ramki DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak usun\u0105\u0107 kolumn\u0119 indeksu w pandach (z przyk\u0142adami)\"}]},{\"@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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