{"id":3348,"date":"2023-07-17T23:15:56","date_gmt":"2023-07-17T23:15:56","guid":{"rendered":"https:\/\/statorials.org\/pl\/pandy-porownuja-kolumny-w-dwoch-ramkach-danych\/"},"modified":"2023-07-17T23:15:56","modified_gmt":"2023-07-17T23:15:56","slug":"pandy-porownuja-kolumny-w-dwoch-ramkach-danych","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/pandy-porownuja-kolumny-w-dwoch-ramkach-danych\/","title":{"rendered":"Pandy: jak por\u00f3wna\u0107 kolumny w dw\u00f3ch r\u00f3\u017cnych ramkach danych"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod, aby por\u00f3wna\u0107 kolumny z dw\u00f3ch r\u00f3\u017cnych ramek danych panda:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Metoda 1: Policz pasuj\u0105ce warto\u015bci mi\u0119dzy kolumnami<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df1[' <span style=\"color: #ff0000;\">my_column<\/span> ']. <span style=\"color: #3366ff;\">isin<\/span> (df2[' <span style=\"color: #ff0000;\">my_column<\/span> ']). <span style=\"color: #3366ff;\">value_counts<\/span> ()\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 2: Poka\u017c pasuj\u0105ce warto\u015bci mi\u0119dzy kolumnami<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>p.d. <span style=\"color: #3366ff;\">merge<\/span> (df1, df2, on=[' <span style=\"color: #ff0000;\">my_column<\/span> '], how=' <span style=\"color: #ff0000;\">inner<\/span> ')<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 ka\u017cdej metody z nast\u0119puj\u0105cymi ramkami danych pand:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n<span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#create first DataFrame\n<\/span>df1 = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">team<\/span> ': ['Mavs', 'Rockets', 'Spurs', 'Heat', 'Nets'],\n                    ' <span style=\"color: #ff0000;\">points<\/span> ': [22, 30, 15, 17, 14]})\n\n<span style=\"color: #008080;\">#view DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> (df1)\n\n      team points\n0 Mavs 22\n1 Rockets 30\n2 Spurs 15\n3 Heat 17\n4 Nets 14\n\n<span style=\"color: #008080;\">#create second DataFrame\n<\/span>df2 = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">team<\/span> ': ['Mavs', 'Thunder', 'Spurs', 'Nets', 'Cavs'],\n                    ' <span style=\"color: #ff0000;\">points<\/span> ': [25, 40, 31, 32, 22]})\n\n<span style=\"color: #008080;\">#view DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> (df2)\n\n      team points\n0 Mavs 25\n1 Thunder 40\n2 Spurs 31\n3 Nets 32\n4 Cavs 22\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Policz pasuj\u0105ce warto\u015bci mi\u0119dzy kolumnami<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak policzy\u0107 liczb\u0119 pasuj\u0105cych warto\u015bci pomi\u0119dzy kolumnami <strong>zespo\u0142u<\/strong> w ka\u017cdej ramce DataFrame:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\"><span style=\"color: #008080;\">#count matching values in team columns\n<\/span><span style=\"color: #000000;\">df1[' <span style=\"color: #ff0000;\">team<\/span> ']. <span style=\"color: #3366ff;\">isin<\/span> (df2[' <span style=\"color: #ff0000;\">team<\/span> ']). <span style=\"color: #3366ff;\">value_counts<\/span> ()\n\nTrue 3\nFalse 2\nName: team, dtype: int64\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Widzimy, \u017ce dwie ramki danych maj\u0105 <strong>3<\/strong> wsp\u00f3lne nazwy zespo\u0142\u00f3w i <strong>2<\/strong> r\u00f3\u017cne nazwy zespo\u0142\u00f3w.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Poka\u017c pasuj\u0105ce warto\u015bci pomi\u0119dzy kolumnami<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wy\u015bwietli\u0107 rzeczywiste pasuj\u0105ce warto\u015bci pomi\u0119dzy kolumnami <strong>zespo\u0142u<\/strong> w ka\u017cdej ramce DataFrame:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\"><span style=\"color: #008080;\">#display matching values between team columns\n<\/span><span style=\"color: #000000;\">p.d. <span style=\"color: #3366ff;\">merge<\/span> (df1, df2, on=[' <span style=\"color: #ff0000;\">team<\/span> '], how=' <span style=\"color: #ff0000;\">inner<\/span> ')\n\n\tteam points_x points_y\n0 Mavs 22 25\n1 Spurs 15 31\n2 Nets 14 32<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Z wyniku widzimy, \u017ce obie ramki DataFrame maj\u0105 wsp\u00f3lne warto\u015bci w kolumnach <strong>zespo\u0142u<\/strong> :<\/span><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Mavs<\/span><\/li>\n<li> <span style=\"color: #000000;\">Ostrogi<\/span><\/li>\n<li> <span style=\"color: #000000;\">Siatki<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>Powi\u0105zane:<\/strong> <a href=\"https:\/\/statorials.org\/pl\/uszczelki-wewnetrzne-pandy\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 po\u0142\u0105czenie wewn\u0119trzne w Pandach (z przyk\u0142adem)<\/a><\/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-zmieniaja-nazwy-kolumn\/\" target=\"_blank\" rel=\"noopener\">Jak zmieni\u0107 nazwy kolumn w Pandach<\/a><br \/> Jak doda\u0107 kolumn\u0119 do ramki danych Pandas<br \/> <a href=\"https:\/\/statorials.org\/pl\/pandy-zmieniaja-kolejnosc-kolumn\/\" target=\"_blank\" rel=\"noopener\">Jak zmieni\u0107 kolejno\u015b\u0107 kolumn w Pandas DataFrame<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod, aby por\u00f3wna\u0107 kolumny z dw\u00f3ch r\u00f3\u017cnych ramek danych panda: Metoda 1: Policz pasuj\u0105ce warto\u015bci mi\u0119dzy kolumnami df1[&#8217; my_column &#8217;]. isin (df2[&#8217; my_column &#8217;]). value_counts () Metoda 2: Poka\u017c pasuj\u0105ce warto\u015bci mi\u0119dzy kolumnami p.d. merge (df1, df2, on=[&#8217; my_column &#8217;], how=&#8217; inner &#8217;) Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 ka\u017cdej metody z nast\u0119puj\u0105cymi [&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-3348","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 por\u00f3wna\u0107 kolumny w dw\u00f3ch r\u00f3\u017cnych ramkach danych - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, wraz z przyk\u0142adami, jak por\u00f3wna\u0107 kolumny dw\u00f3ch ramek danych pand.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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