{"id":3699,"date":"2023-07-16T01:36:44","date_gmt":"2023-07-16T01:36:44","guid":{"rendered":"https:\/\/statorials.org\/pl\/pandy-odejmuje-dwie-ramki-danych\/"},"modified":"2023-07-16T01:36:44","modified_gmt":"2023-07-16T01:36:44","slug":"pandy-odejmuje-dwie-ramki-danych","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/pandy-odejmuje-dwie-ramki-danych\/","title":{"rendered":"Pandy: jak odj\u0105\u0107 dwie ramki danych"},"content":{"rendered":"

<\/p>\n

\n

Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby odj\u0105\u0107 jedn\u0105 ramk\u0119 danych pandy od drugiej:<\/span><\/p>\n

 df1. subtract<\/span> (df2)\n<\/strong><\/pre>\n
 Je\u015bli w ka\u017cdej ramce danych znajduje si\u0119 kolumna znakowa, konieczne mo\u017ce by\u0107 najpierw przeniesienie jej do kolumny indeksu ka\u017cdej ramki danych:<\/span><\/p>\n
 df1. set_index<\/span> (' char_column<\/span> '). subtract<\/span> ( df2.set_index<\/span> (' char_column<\/span> '))<\/strong><\/pre>\n
 Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 ka\u017cdej sk\u0142adni w praktyce.<\/span><\/p>\n
 Przyk\u0142ad 1: Odejmij dwie ramki danych Pandas (tylko kolumny numeryczne)<\/strong><\/span><\/h2>\n
 Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105ce dwie ramki danych pand, kt\u00f3re maj\u0105 tylko kolumny numeryczne:<\/span><\/p>\n
 import<\/span> pandas as<\/span> pd\n\n#create first DataFrame\n<\/span>df1 = pd. DataFrame<\/span> ({' points<\/span> ': [5, 17, 7, 19, 12, 13, 9, 24],\n                    ' assists<\/span> ': [4, 7, 7, 6, 8, 7, 10, 11]})\n\nprint<\/span> (df1)\n\n   assist points\n0 5 4\n1 17 7\n2 7 7\n3 19 6\n4 12 8\n5 13 7\n6 9 10\n7 24 11\n\n#create second DataFrame\n<\/span>df2 = pd. DataFrame<\/span> ({' points<\/span> ': [4, 22, 10, 3, 7, 8, 12, 10],\n                    ' assists<\/span> ': [3, 5, 5, 4, 7, 14, 9, 5]})\n\nprint<\/span> (df2)\n\n   assist points\n0 4 3\n1 22 5\n2 10 5\n3 3 4\n4 7 7\n5 8 14\n6 12 9\n7 10 5\n<\/span><\/span><\/span><\/strong><\/pre>\n
 Poni\u017cszy kod pokazuje, jak odj\u0105\u0107 odpowiednie warto\u015bci pomi\u0119dzy dwiema ramkami DataFrame:<\/span><\/p>\n
 #subtract corresponding values between the two DataFrames<\/span>\ndf1. subtract<\/span> (df2)\n\n\tassist points\n0 1 1\n1 -5 2\n2 -3 2\n3 16 2\n4 5 1\n5 5 -7\n6 -3 1\n7 14 6\n<\/strong><\/span><\/pre>\n
 Przyk\u0142ad 2: Odejmij dwie ramki danych Pandas (po\u0142\u0105czenie kolumn znakowych i numerycznych)<\/strong><\/span><\/h2>\n
 Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105ce dwie ramki danych pand, z kt\u00f3rych ka\u017cda ma kolumn\u0119 znakow\u0105 zwan\u0105 zespo\u0142em<\/strong> :<\/span><\/p>\n
 import<\/span> pandas as<\/span> pd\n\n#create first DataFrame\n<\/span>df1 = pd. DataFrame<\/span> ({' team<\/span> ': ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H'],\n                    ' points<\/span> ': [5, 17, 7, 19, 12, 13, 9, 24],\n                    ' assists<\/span> ': [4, 7, 7, 6, 8, 7, 10, 11]})\n\nprint<\/span> (df1)\n\n  team points assists\n0 to 5 4\n1 B 17 7\n2 C 7 7\n3 D 19 6\n4 E 12 8\n5 F 13 7\n6 G 9 10\n7:24 a.m. 11\n\n#create second DataFrame\n<\/span>df2 = pd. DataFrame<\/span> ({' team<\/span> ': ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H'],\n                    ' points<\/span> ': [4, 22, 10, 3, 7, 8, 12, 10],\n                    ' assists<\/span> ': [3, 5, 5, 4, 7, 14, 9, 3]})\n\nprint<\/span> (df2)\n\n  team points assists\n0 to 4 3\n1 B 22 5\n2 C 10 5\n3 D 3 4\n4 E 7 7\n5 F 8 14\n6 G 12 9\n7:10 a.m. 3<\/span><\/strong><\/pre>\n
 Poni\u017cszy kod pokazuje, jak przenie\u015b\u0107 kolumn\u0119 zespo\u0142u<\/strong> do kolumny indeksu ka\u017cdej ramki DataFrame, a nast\u0119pnie odj\u0105\u0107 odpowiednie warto\u015bci pomi\u0119dzy dwiema ramkami DataFrame:<\/span><\/p>\n
 #move 'team' column to index of each DataFrame and subtract corresponding values\n<\/span>df1. set_index<\/span> (' team<\/span> '). subtract<\/span> ( df2.set_index<\/span> (' team<\/span> '))\n\n\tassist points\nteam\t\t\nAt 1 1\nB-52\nC -3 2\nD 16 2\nE 5 1\nF 5 -7\nG -3 1\nH 14 8\n<\/span><\/strong><\/pre>\n
 Dodatkowe zasoby<\/strong><\/span><\/h2>\n
 Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe zadania w pandach:<\/span><\/p>\n
 Pandy: jak znale\u017a\u0107 r\u00f3\u017cnic\u0119 mi\u0119dzy dwiema kolumnami<\/a>
 Pandy: jak znale\u017a\u0107 r\u00f3\u017cnic\u0119 mi\u0119dzy dwiema liniami<\/a>
 Pandy: jak odj\u0105\u0107 dwie kolumny<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby odj\u0105\u0107 jedn\u0105 ramk\u0119 danych pandy od drugiej: df1. subtract (df2) Je\u015bli w ka\u017cdej ramce danych znajduje si\u0119 kolumna znakowa, konieczne mo\u017ce by\u0107 najpierw przeniesienie jej do kolumny indeksu ka\u017cdej ramki danych: df1. set_index (’ char_column ’). subtract ( df2.set_index (’ char_column ’)) Poni\u017csze przyk\u0142ady pokazuj\u0105, jak u\u017cywa\u0107 ka\u017cdej sk\u0142adni w […]<\/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-3699","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nPandy: Jak odj\u0105\u0107 dwie ramki danych - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak odejmowa\u0107 warto\u015bci mi\u0119dzy dwiema ramkami DataFrame pand, z kilkoma przyk\u0142adami.\" \/>\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-odejmuje-dwie-ramki-danych\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pandy: Jak odj\u0105\u0107 dwie ramki danych - Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak odejmowa\u0107 warto\u015bci mi\u0119dzy dwiema ramkami DataFrame pand, z kilkoma przyk\u0142adami.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/pandy-odejmuje-dwie-ramki-danych\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-16T01:36:44+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-odejmuje-dwie-ramki-danych\/\",\"url\":\"https:\/\/statorials.org\/pl\/pandy-odejmuje-dwie-ramki-danych\/\",\"name\":\"Pandy: Jak odj\u0105\u0107 dwie ramki danych - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-16T01:36:44+00:00\",\"dateModified\":\"2023-07-16T01:36:44+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak odejmowa\u0107 warto\u015bci mi\u0119dzy dwiema ramkami DataFrame pand, z kilkoma przyk\u0142adami.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/pandy-odejmuje-dwie-ramki-danych\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/pandy-odejmuje-dwie-ramki-danych\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/pandy-odejmuje-dwie-ramki-danych\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pandy: jak odj\u0105\u0107 dwie ramki danych\"}]},{\"@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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