{"id":4036,"date":"2023-07-14T00:50:47","date_gmt":"2023-07-14T00:50:47","guid":{"rendered":"https:\/\/statorials.org\/pl\/ramka-danych-fragmentu-pandy\/"},"modified":"2023-07-14T00:50:47","modified_gmt":"2023-07-14T00:50:47","slug":"ramka-danych-fragmentu-pandy","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/ramka-danych-fragmentu-pandy\/","title":{"rendered":"Jak podzieli\u0107 ramk\u0119 danych pandas na kawa\u0142ki"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni, aby podzieli\u0107 ramk\u0119 danych pandy na mniejsze cz\u0119\u015bci:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#specify number of rows in each chunk\n<\/span>n= <span style=\"color: #008000;\">3<\/span>\n\n<span style=\"color: #008080;\">#split DataFrame into chunks\n<\/span>list_df = [df[i:i+n] <span style=\"color: #008000;\">for<\/span> i <span style=\"color: #008000;\">in<\/span> range(0, <span style=\"color: #3366ff;\">len<\/span> (df),n)]\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nast\u0119pnie mo\u017cesz uzyska\u0107 dost\u0119p do ka\u017cdej porcji, u\u017cywaj\u0105c nast\u0119puj\u0105cej sk\u0142adni:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <b><span style=\"color: #008080;\">#access first chunk<\/span>\n<strong>list_df[0]<\/strong>\n<\/b><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017cszy przyk\u0142ad pokazuje, jak zastosowa\u0107 t\u0119 sk\u0142adni\u0119 w praktyce.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad: podziel ramk\u0119 danych Pandas na kawa\u0142ki<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 danych pandy z dziewi\u0119cioma wierszami zawieraj\u0105cymi informacje o r\u00f3\u017cnych koszykarzach:<\/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;\">team<\/span> ': ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'],\n                   ' <span style=\"color: #ff0000;\">points<\/span> ': [18, 22, 19, 14, 14, 11, 20, 28, 23],\n                   ' <span style=\"color: #ff0000;\">assists<\/span> ': [5, 7, 7, 9, 12, 9, 9, 4, 11],\n                   ' <span style=\"color: #ff0000;\">rebounds<\/span> ': [11, 8, 10, 6, 6, 5, 9, 12, 10]})\n\n<span style=\"color: #008080;\">#view DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> (df)\n\n  team points assists rebounds\n0 A 18 5 11\n1 B 22 7 8\n2 C 19 7 10\n3 D 14 9 6\n4 E 14 12 6\n5 F 11 9 5\n6 G 20 9 9\n7:28 4 12\n8 I 23 11 10<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby podzieli\u0107 ramk\u0119 DataFrame na fragmenty, z kt\u00f3rych ka\u017cdy zawiera 3 linie:<\/span><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#specify number of rows in each chunk\n<\/span>n= <span style=\"color: #008000;\">3<\/span>\n\n<span style=\"color: #008080;\">#split DataFrame into chunks\n<\/span>list_df = [df[i:i+n] <span style=\"color: #008000;\">for<\/span> i <span style=\"color: #008000;\">in<\/span> range(0, <span style=\"color: #3366ff;\">len<\/span> (df),n)]<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy nast\u0119pnie u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby uzyska\u0107 dost\u0119p do ka\u017cdego elementu:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#view first chunk\n<span style=\"color: #008000;\">print<\/span><\/span> (list_df[0])\n\n  team points assists rebounds\n0 A 18 5 11\n1 B 22 7 8\n2 C 19 7 10\n\n<span style=\"color: #008080;\">#view second chunk\n<\/span><span style=\"color: #008000;\">print<\/span> (list_df[1])\n\n  team points assists rebounds\n3 D 14 9 6\n4 E 14 12 6\n5 F 11 9 5\n\n<span style=\"color: #008080;\">#view third chunk\n<\/span><span style=\"color: #008000;\">print<\/span> (list_df[2])\n\n  team points assists rebounds\n6 G 20 9 9\n7:28 4 12\n8 I 23 11 10\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Zauwa\u017c, \u017ce ka\u017cdy fragment zawiera trzy linie, jak okre\u015blili\u015bmy.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Nale\u017cy zauwa\u017cy\u0107, \u017ce w tym przyk\u0142adzie jako prosty przyk\u0142ad u\u017cyli\u015bmy ramki DataFrame zawieraj\u0105cej tylko dziewi\u0119\u0107 wierszy.<\/span><\/p>\n<p> <span style=\"color: #000000;\">W praktyce prawdopodobnie b\u0119dziesz pracowa\u0107 z ramk\u0105 DataFrame zawieraj\u0105c\u0105 setki tysi\u0119cy, a nawet miliony wierszy.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 tej samej sk\u0142adni u\u017cytej w tym przyk\u0142adzie, aby podzieli\u0107 ramk\u0119 DataFrame na fragmenty o okre\u015blonych rozmiarach.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe zadania w pandach:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/pandy-dziela-ramke-danych-wed\u0142ug-wartosci-kolumny\/\" target=\"_blank\" rel=\"noopener\">Pandy: Jak podzieli\u0107 ramk\u0119 danych wed\u0142ug warto\u015bci kolumny<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/podzielona-kolumna-pandy\/\" target=\"_blank\" rel=\"noopener\">Pandy: Jak podzieli\u0107 kolumn\u0119 ci\u0105gu na wiele kolumn<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pandas-dzieli-kolumne-list-na-kolumny\/\" target=\"_blank\" rel=\"noopener\">Pandy: Jak podzieli\u0107 kolumn\u0119 list na wiele kolumn<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni, aby podzieli\u0107 ramk\u0119 danych pandy na mniejsze cz\u0119\u015bci: #specify number of rows in each chunk n= 3 #split DataFrame into chunks list_df = [df[i:i+n] for i in range(0, len (df),n)] Nast\u0119pnie mo\u017cesz uzyska\u0107 dost\u0119p do ka\u017cdej porcji, u\u017cywaj\u0105c nast\u0119puj\u0105cej sk\u0142adni: #access first chunk list_df[0] Poni\u017cszy przyk\u0142ad pokazuje, jak zastosowa\u0107 t\u0119 [&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-4036","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 poci\u0105\u0107 ramk\u0119 danych Pandas na kawa\u0142ki \u2013 Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, na przyk\u0142adzie, jak podzieli\u0107 ramk\u0119 DataFrame pandy na kawa\u0142ki.\" \/>\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\/ramka-danych-fragmentu-pandy\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta 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