{"id":4509,"date":"2023-07-10T13:04:53","date_gmt":"2023-07-10T13:04:53","guid":{"rendered":"https:\/\/statorials.org\/pl\/dplyr-left-laczy-rozne-nazwy-kolumn\/"},"modified":"2023-07-10T13:04:53","modified_gmt":"2023-07-10T13:04:53","slug":"dplyr-left-laczy-rozne-nazwy-kolumn","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/dplyr-left-laczy-rozne-nazwy-kolumn\/","title":{"rendered":"Lewe po\u0142\u0105czenie w dplyr z r\u00f3\u017cnymi nazwami kolumn"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni w dplyr, aby po\u0142\u0105czy\u0107 dwie ramki danych, gdy \u0142\u0105czone kolumny maj\u0105 r\u00f3\u017cne nazwy w ka\u017cdej ramce danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (dplyr)\n\n<\/span>final_df &lt;- left_join(df_A, df_B, by = c(' <span style=\"color: #ff0000;\">team<\/span> ' = ' <span style=\"color: #ff0000;\">team_name<\/span> '))\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Ten konkretny przyk\u0142ad wykona lewe z\u0142\u0105czenie ramek danych o nazwie <strong>df_A<\/strong> i <strong>df_B<\/strong> , \u0142\u0105cz\u0105c kolumn\u0119 z <strong>df_A<\/strong> o nazwie <strong>zesp\u00f3\u0142<\/strong> i kolumn\u0119 z <strong>df_B<\/strong> o nazwie <strong>nazwa_zespo\u0142u<\/strong> .<\/span><\/p>\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: wykonaj lewe z\u0142\u0105czenie z r\u00f3\u017cnymi nazwami kolumn w dplyr<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy, \u017ce mamy w R nast\u0119puj\u0105ce dwie ramki danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create first data frame\n<\/span>df_A &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'B', 'C', 'D', 'E'),\n                   dots=c(22, 25, 19, 14, 38))\n\ndf_A\n\n  team points\n1 to 22\n2 B 25\n3 C 19\n4 D 14\n5 E 38\n\n<span style=\"color: #008080;\">#create second data frame\n<\/span>df_B &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'C', 'D', 'F', 'G'),\n                   rebounds=c(14, 8, 8, 6, 9))\n\ndf_B\n\n  team_name rebounds\n1 to 14\n2 C 8\n3 D 8\n4 F 6\n5 G 9\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni w dplyr, aby wykona\u0107 lewe z\u0142\u0105czenie w oparciu o pasuj\u0105ce warto\u015bci w kolumnie <strong>zespo\u0142u<\/strong> <strong>df_A<\/strong> i kolumnie <strong>nazwa_zespo\u0142u<\/strong> <strong>df_B<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#perform left join based on different column names in df_A and df_B\n<\/span>final_df &lt;- left_join(df_A, df_B, by = c(' <span style=\"color: #ff0000;\">team<\/span> ' = ' <span style=\"color: #ff0000;\">team_name<\/span> '))\n\n<span style=\"color: #008080;\">#view final data frame\n<\/span>final_df\n\n  team points rebounds\n1 to 22 14\n2 B 25 NA\n3 C 19 8\n4 D 14 8\n5 E 38 NA\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Wynikowa ramka danych zawiera wszystkie wiersze z <strong>df_A<\/strong> i tylko wiersze z <strong>df_B<\/strong> , w kt\u00f3rych warto\u015bci <strong>zespo\u0142u<\/strong> odpowiadaj\u0105 warto\u015bciom <strong>nazwa_zespo\u0142u<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Pami\u0119taj, \u017ce mo\u017cesz tak\u017ce przeszukiwa\u0107 wiele kolumn o r\u00f3\u017cnych nazwach, korzystaj\u0105c z nast\u0119puj\u0105cej podstawowej sk\u0142adni:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#perform left join based on multiple different column names\n<\/span>final_df &lt;- left_join(df_A, df_B, by = c(' <span style=\"color: #ff0000;\">A1<\/span> ' = ' <span style=\"color: #ff0000;\">B1<\/span> ', ' <span style=\"color: #ff0000;\">A2<\/span> ' = ' <span style=\"color: #ff0000;\">B2<\/span> ', ' <span style=\"color: #ff0000;\">A3<\/span> ' = ' <span style=\"color: #ff0000;\">B3<\/span> '))<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : Pe\u0142n\u0105 dokumentacj\u0119 funkcji <strong>left_join()<\/strong> w dplyr znajdziesz <a href=\"https:\/\/dplyr.tidyverse.org\/reference\/mutate-joins.html\" target=\"_blank\" rel=\"noopener\">tutaj<\/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 operacje w j\u0119zyku R:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><a href=\"https:\/\/statorials.org\/pl\/lewo,-do\u0142acz-r\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 lewe z\u0142\u0105czenie w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/dobrze,-do\u0142acz-do-r\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 prawid\u0142owe po\u0142\u0105czenie w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/po\u0142aczenie-wewnetrzne-r\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 z\u0142\u0105czenie wewn\u0119trzne w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/z\u0142acze-zewnetrzne-r\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 z\u0142\u0105czenie zewn\u0119trzne w R<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni w dplyr, aby po\u0142\u0105czy\u0107 dwie ramki danych, gdy \u0142\u0105czone kolumny maj\u0105 r\u00f3\u017cne nazwy w ka\u017cdej ramce danych: library (dplyr) final_df &lt;- left_join(df_A, df_B, by = c(&#8217; team &#8217; = &#8217; team_name &#8217;)) Ten konkretny przyk\u0142ad wykona lewe z\u0142\u0105czenie ramek danych o nazwie df_A i df_B , \u0142\u0105cz\u0105c kolumn\u0119 z df_A [&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-4509","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>Do\u0142\u0105cz do lewej w dplyr z r\u00f3\u017cnymi nazwami kolumn - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak wykona\u0107 lewe z\u0142\u0105czenie przy u\u017cyciu dplyr z r\u00f3\u017cnymi nazwami kolumn, wraz z przyk\u0142adem.\" \/>\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\/dplyr-left-laczy-rozne-nazwy-kolumn\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Do\u0142\u0105cz do lewej w dplyr z r\u00f3\u017cnymi nazwami kolumn - Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak wykona\u0107 lewe z\u0142\u0105czenie przy u\u017cyciu dplyr z r\u00f3\u017cnymi nazwami kolumn, wraz z przyk\u0142adem.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/dplyr-left-laczy-rozne-nazwy-kolumn\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-10T13:04:53+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\/dplyr-left-laczy-rozne-nazwy-kolumn\/\",\"url\":\"https:\/\/statorials.org\/pl\/dplyr-left-laczy-rozne-nazwy-kolumn\/\",\"name\":\"Do\u0142\u0105cz do lewej w dplyr z r\u00f3\u017cnymi nazwami kolumn - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-10T13:04:53+00:00\",\"dateModified\":\"2023-07-10T13:04:53+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak wykona\u0107 lewe z\u0142\u0105czenie przy u\u017cyciu dplyr z r\u00f3\u017cnymi nazwami kolumn, wraz z przyk\u0142adem.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/dplyr-left-laczy-rozne-nazwy-kolumn\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/dplyr-left-laczy-rozne-nazwy-kolumn\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/dplyr-left-laczy-rozne-nazwy-kolumn\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Lewe po\u0142\u0105czenie w dplyr z r\u00f3\u017cnymi nazwami kolumn\"}]},{\"@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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