{"id":1264,"date":"2023-07-27T02:10:24","date_gmt":"2023-07-27T02:10:24","guid":{"rendered":"https:\/\/statorials.org\/pl\/pandy-wybieraja-wiersze-wedlug-indeksu\/"},"modified":"2023-07-27T02:10:24","modified_gmt":"2023-07-27T02:10:24","slug":"pandy-wybieraja-wiersze-wedlug-indeksu","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/pandy-wybieraja-wiersze-wedlug-indeksu\/","title":{"rendered":"Jak wybiera\u0107 wiersze wed\u0142ug indeksu w ramce danych pandas"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Cz\u0119sto mo\u017cesz chcie\u0107 wybra\u0107 wiersze w ramce danych pand na podstawie ich warto\u015bci indeksu.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Je\u015bli chcesz wybiera\u0107 wiersze na podstawie indeksowania liczb ca\u0142kowitych, mo\u017cesz u\u017cy\u0107 funkcji <strong>.iloc<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Je\u015bli chcesz wybiera\u0107 wiersze na podstawie indeksowania etykiet, mo\u017cesz u\u017cy\u0107 funkcji <strong>.loc<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">W tym samouczku przedstawiono przyk\u0142ad praktycznego wykorzystania ka\u017cdej z tych funkcji.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Wybierz wiersze na podstawie indeksowania liczb ca\u0142kowitych<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak utworzy\u0107 pand\u0119 DataFrame i u\u017cy\u0107 <strong>.iloc<\/strong> do wybrania wiersza o warto\u015bci indeksu ca\u0142kowitego r\u00f3wnej <strong>4<\/strong> :<\/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<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\">#make this example reproducible\n<span style=\"color: #000000;\">n.p. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">seeds<\/span> (0)\n\n<span style=\"color: #008080;\">#createDataFrame<\/span><\/span>\n<span style=\"color: #000000;\">df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ( <span style=\"color: #3366ff;\">np.random.rand<\/span> (6,2),index=range(0,18,3),columns=[' <span style=\"color: #008000;\">A<\/span> <span style=\"color: #3366ff;\">'<\/span> ,' <span style=\"color: #008000;\">B<\/span> '])<\/span>\n<span style=\"color: #000000;\">\n<span style=\"color: #008080;\">#view DataFrame<\/span>\ndf\n\n\t       A B\n0 0.548814 0.715189\n3 0.602763 0.544883\n6 0.423655 0.645894\n9 0.437587 0.891773\n12 0.963663 0.383442\n15 0.791725 0.528895\n\n<\/span>#select the 5th row of the DataFrame\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">iloc<\/span> [[4]]\n\n\t       A B\n12 0.963663 0.383442<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 podobnej sk\u0142adni, aby wybra\u0107 wiele wierszy:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select the 3rd, 4th, and 5th rows of the DataFrame\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">iloc<\/span> [[2, 3, 4]]\n\n\t       A B\n6 0.423655 0.645894\n9 0.437587 0.891773\n12 0.963663 0.383442\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Lub mo\u017cemy zaznaczy\u0107 wszystkie wiersze w zakresie:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select the 3rd, 4th, and 5th rows of the DataFrame\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">iloc<\/span> [2:5]\n\n\t       A B\n6 0.423655 0.645894\n9 0.437587 0.891773\n12 0.963663 0.383442<\/span><\/span><\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Wybierz wiersze na podstawie indeksowania etykiet<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak utworzy\u0107 ramk\u0119 danych pandy i u\u017cy\u0107 <strong>.loc<\/strong> , aby wybra\u0107 wiersz z etykiet\u0105 indeksu <strong>3<\/strong> :<\/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<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\">#make this example reproducible\n<span style=\"color: #000000;\">n.p. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">seeds<\/span> (0)\n\n<span style=\"color: #008080;\">#createDataFrame<\/span><\/span>\n<span style=\"color: #000000;\">df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ( <span style=\"color: #3366ff;\">np.random.rand<\/span> (6,2),index=range(0,18,3),columns=[' <span style=\"color: #008000;\">A<\/span> <span style=\"color: #3366ff;\">'<\/span> ,' <span style=\"color: #008000;\">B<\/span> '])<\/span>\n<span style=\"color: #000000;\"><span style=\"color: #008080;\">\n#view DataFrame\n<\/span>df\n\n\t       A B\n0 0.548814 0.715189\n3 0.602763 0.544883\n6 0.423655 0.645894\n9 0.437587 0.891773\n12 0.963663 0.383442\n15 0.791725 0.528895\n\n<\/span>#select the row with index label '3'\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">loc<\/span> [[3]]\n\n               A B\n3 0.602763 0.544883<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 podobnej sk\u0142adni, aby wybra\u0107 wiele wierszy z r\u00f3\u017cnymi etykietami indeksu:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select the rows with index labels '3', '6', and '9'\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">loc<\/span> [[3, 6, 9]]\n\n\t       A B\n3 0.602763 0.544883\n6 0.423655 0.645894\n9 0.437587 0.891773<\/span><\/span><\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>R\u00f3\u017cnica mi\u0119dzy .iloc i .loc<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Powy\u017csze przyk\u0142ady ilustruj\u0105 subteln\u0105 r\u00f3\u017cnic\u0119 pomi\u0119dzy <strong>.iloc<\/strong> i <strong>.loc<\/strong> :<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>.iloc<\/strong> wybiera wiersze na podstawie <strong>indeksu ca\u0142kowitego<\/strong> . Je\u015bli wi\u0119c chcesz wybra\u0107 pi\u0105ty wiersz ramki DataFrame, u\u017cyjesz df.iloc[[4]], poniewa\u017c pierwszy wiersz ma indeks 0, drugi wiersz ma indeks 1 i tak dalej.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>.loc<\/strong> wybiera wiersze na podstawie <strong>indeksu oznaczonego etykiet\u0105<\/strong> . Je\u015bli wi\u0119c chcesz wybra\u0107 wiersz z etykiet\u0105 indeksu 5, u\u017cyjesz bezpo\u015brednio df.loc[[5]].<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pl\/pandy-otrzymuja-numer-linii\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak uzyska\u0107 numery wierszy w ramce danych Pandas<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/upusc-pandy\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak usun\u0105\u0107 wiersze z warto\u015bciami NaN w Pandach<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/upusc-pandy-indeksowe\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jak usun\u0105\u0107 kolumn\u0119 indeksu w Pandach<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cz\u0119sto mo\u017cesz chcie\u0107 wybra\u0107 wiersze w ramce danych pand na podstawie ich warto\u015bci indeksu. Je\u015bli chcesz wybiera\u0107 wiersze na podstawie indeksowania liczb ca\u0142kowitych, mo\u017cesz u\u017cy\u0107 funkcji .iloc . Je\u015bli chcesz wybiera\u0107 wiersze na podstawie indeksowania etykiet, mo\u017cesz u\u017cy\u0107 funkcji .loc . W tym samouczku przedstawiono przyk\u0142ad praktycznego wykorzystania ka\u017cdej z tych funkcji. Przyk\u0142ad 1: Wybierz [&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-1264","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 wybiera\u0107 wiersze wed\u0142ug indeksu w ramce danych Pandas - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak wybiera\u0107 wiersze na podstawie warto\u015bci indeksu w ramce 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\/pandy-wybieraja-wiersze-wedlug-indeksu\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak wybiera\u0107 wiersze wed\u0142ug indeksu w ramce danych Pandas - Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak wybiera\u0107 wiersze na podstawie warto\u015bci indeksu w ramce DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/pandy-wybieraja-wiersze-wedlug-indeksu\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T02:10:24+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\/pandy-wybieraja-wiersze-wedlug-indeksu\/\",\"url\":\"https:\/\/statorials.org\/pl\/pandy-wybieraja-wiersze-wedlug-indeksu\/\",\"name\":\"Jak wybiera\u0107 wiersze wed\u0142ug indeksu w ramce danych Pandas - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-27T02:10:24+00:00\",\"dateModified\":\"2023-07-27T02:10:24+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak wybiera\u0107 wiersze na podstawie warto\u015bci indeksu w ramce DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/pandy-wybieraja-wiersze-wedlug-indeksu\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/pandy-wybieraja-wiersze-wedlug-indeksu\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/pandy-wybieraja-wiersze-wedlug-indeksu\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak wybiera\u0107 wiersze wed\u0142ug indeksu w ramce danych pandas\"}]},{\"@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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