{"id":4313,"date":"2023-07-12T02:04:35","date_gmt":"2023-07-12T02:04:35","guid":{"rendered":"https:\/\/statorials.org\/pl\/pandy-grupuja-wedlug-rozmiaru\/"},"modified":"2023-07-12T02:04:35","modified_gmt":"2023-07-12T02:04:35","slug":"pandy-grupuja-wedlug-rozmiaru","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/pandy-grupuja-wedlug-rozmiaru\/","title":{"rendered":"Pandy: jak u\u017cywa\u0107 groupby() z size()"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod z funkcjami <strong>groupby()<\/strong> i <strong>size()<\/strong> w pandach, aby policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 na grup\u0119:<\/span><\/p>\n<p> <strong><span style=\"color: #000000;\">Metoda 1: zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug zmiennej<\/span><\/strong><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">groupby<\/span> (' <span style=\"color: #ff0000;\">var1<\/span> '). <span style=\"color: #3366ff;\">size<\/span> ()\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 2: Zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug wielu zmiennych<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">var1<\/span> ', ' <span style=\"color: #ff0000;\">var2<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> ()<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 3: Zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug wielu zmiennych i posortowanych wed\u0142ug liczby<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">var1<\/span> ', ' <span style=\"color: #ff0000;\">var2<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> (). <span style=\"color: #3366ff;\">sort_values<\/span> (ascending= <span style=\"color: #008000;\">False<\/span> )<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce u\u017cywa\u0107 ka\u017cdej metody z nast\u0119puj\u0105c\u0105 ramk\u0105 DataFrame pand:<\/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', 'A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'B'],\n                   ' <span style=\"color: #ff0000;\">position<\/span> ': ['G', 'G', 'F', 'F', 'F', 'G', 'G', 'G', 'G', 'F'],\n                   ' <span style=\"color: #ff0000;\">points<\/span> ': [15, 22, 24, 25, 20, 35, 34, 19, 14, 12]})\n\n<span style=\"color: #008080;\">#view DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> (df)\n\n  team position points\n0 AG 15\n1 AG 22\n2 AF 24\n3 AF 25\n4 AF 20\n5 BG 35\n6 BG 34\n7 BG 19\n8 BG 14\n9 BF 12<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug zmiennej<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wykorzysta\u0107 funkcje <strong>groupby()<\/strong> i <strong>size()<\/strong> do zliczania wyst\u0105pie\u0144 warto\u015bci w kolumnie <strong>zespo\u0142u<\/strong> :<\/span><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count occurrences of each value in team column\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">groupby<\/span> (' <span style=\"color: #ff0000;\">team<\/span> '). <span style=\"color: #3366ff;\">size<\/span> ()\n\nteam\nAT 5\nB5\ndtype: int64\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku widzimy, \u017ce warto\u015bci A i B pojawiaj\u0105 si\u0119 <strong>5<\/strong> razy w kolumnie <strong>zespo\u0142u<\/strong> .<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2:<\/strong><\/span> <span style=\"color: #000000;\"><strong>Zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug wielu zmiennych<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak u\u017cywa\u0107 funkcji <strong>groupby()<\/strong> i <strong>size()<\/strong> do zliczania wyst\u0105pie\u0144 warto\u015bci dla ka\u017cdej kombinacji warto\u015bci w kolumnach <strong>zespo\u0142u<\/strong> i <strong>pozycji<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count occurrences of values for each combination of team and position\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">team<\/span> ', ' <span style=\"color: #ff0000;\">position<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> ()\n\nteam position\nAF3\n      G2\nBF 1\n      G4\ndtype: int64\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Z wyniku mo\u017cemy zobaczy\u0107:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Zesp\u00f3\u0142 A i pozycja F pojawiaj\u0105 si\u0119 <strong>3<\/strong> razy.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Zesp\u00f3\u0142 A i pozycja G wyst\u0119puj\u0105 <strong>dwukrotnie<\/strong> .<\/span><\/li>\n<\/ul>\n<p> I tak dalej.<\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3:<\/strong><\/span> <span style=\"color: #000000;\"><strong>zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug kilku zmiennych i sortowanie<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wykorzysta\u0107 funkcje <strong>groupby()<\/strong> i <strong>size()<\/strong> do zliczania wyst\u0105pie\u0144 warto\u015bci dla ka\u017cdej kombinacji warto\u015bci w kolumnach <strong>zesp\u00f3\u0142<\/strong> i <strong>pozycja<\/strong> , a nast\u0119pnie sortowa\u0107 wed\u0142ug liczby:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#count occurrences for each combination of team and position and sort\n<span style=\"color: #000000;\">df. <span style=\"color: #3366ff;\">groupby<\/span> ([' <span style=\"color: #ff0000;\">team<\/span> ', ' <span style=\"color: #ff0000;\">position<\/span> ']). <span style=\"color: #3366ff;\">size<\/span> (). <span style=\"color: #3366ff;\">sort_values<\/span> (ascending= <span style=\"color: #008000;\">False<\/span> )\n\nteam position\nBG 4\nAF3\n      G2\nBF 1\ndtype: int64\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Dane wyj\u015bciowe wy\u015bwietlaj\u0105 liczb\u0119 ka\u017cdej kombinacji warto\u015bci <strong>zespo\u0142u<\/strong> i <strong>pozycji<\/strong> , posortowan\u0105 wed\u0142ug liczby w kolejno\u015bci malej\u0105cej.<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : Aby posortowa\u0107 wed\u0142ug liczb w kolejno\u015bci rosn\u0105cej, po prostu usu\u0144 <strong>rosn\u0105co=False<\/strong> z funkcji <strong>sort_values()<\/strong> .<\/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\/liczba-grup-pand-jest-wyjatkowa\/\" target=\"_blank\" rel=\"noopener\">Jak liczy\u0107 unikalne warto\u015bci za pomoc\u0105 Pandas GroupBy<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pandy-grupuja-sie\/\" target=\"_blank\" rel=\"noopener\">Jak zastosowa\u0107 funkcj\u0119 do Pandas Groupby<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/wykres-s\u0142upkowy-grupowania-pand\/\" target=\"_blank\" rel=\"noopener\">Jak utworzy\u0107 wykres s\u0142upkowy z Pandas GroupBy<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod z funkcjami groupby() i size() w pandach, aby policzy\u0107 liczb\u0119 wyst\u0105pie\u0144 na grup\u0119: Metoda 1: zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug zmiennej df. groupby (&#8217; var1 &#8217;). size () Metoda 2: Zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug wielu zmiennych df. groupby ([&#8217; var1 &#8217;, &#8217; var2 &#8217;]). size () Metoda 3: Zliczanie wyst\u0105pie\u0144 pogrupowanych wed\u0142ug [&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-4313","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>Pandy: Jak u\u017cywa\u0107 groupby() z size() \u2013 Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji groupby() pandy z funkcj\u0105 size() do zliczania liczby wyst\u0105pie\u0144 w grupie.\" \/>\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-grupuja-wedlug-rozmiaru\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pandy: Jak u\u017cywa\u0107 groupby() z size() \u2013 Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji groupby() pandy z funkcj\u0105 size() do zliczania liczby wyst\u0105pie\u0144 w grupie.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/pandy-grupuja-wedlug-rozmiaru\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-12T02:04:35+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-grupuja-wedlug-rozmiaru\/\",\"url\":\"https:\/\/statorials.org\/pl\/pandy-grupuja-wedlug-rozmiaru\/\",\"name\":\"Pandy: Jak u\u017cywa\u0107 groupby() z size() \u2013 Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-12T02:04:35+00:00\",\"dateModified\":\"2023-07-12T02:04:35+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji groupby() pandy z funkcj\u0105 size() do zliczania liczby wyst\u0105pie\u0144 w grupie.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/pandy-grupuja-wedlug-rozmiaru\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/pandy-grupuja-wedlug-rozmiaru\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/pandy-grupuja-wedlug-rozmiaru\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pandy: jak u\u017cywa\u0107 groupby() z size()\"}]},{\"@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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