{"id":3329,"date":"2023-07-18T01:38:17","date_gmt":"2023-07-18T01:38:17","guid":{"rendered":"https:\/\/statorials.org\/pl\/str_sub-w-r\/"},"modified":"2023-07-18T01:38:17","modified_gmt":"2023-07-18T01:38:17","slug":"str_sub-w-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/str_sub-w-r\/","title":{"rendered":"Jak u\u017cywa\u0107 str_sub w r (z przyk\u0142adami)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Funkcja <strong>str_sub()<\/strong> pakietu <a href=\"https:\/\/stringr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">stringr<\/a> w R mo\u017ce zosta\u0107 u\u017cyta do wyodr\u0119bnienia lub zamiany podci\u0105g\u00f3w w ci\u0105gu.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ta funkcja wykorzystuje nast\u0119puj\u0105c\u0105 sk\u0142adni\u0119:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>str_sub(string, pocz\u0105tek, koniec)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Z\u0142oto:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>ci\u0105g znak\u00f3w:<\/strong> wektor znakowy<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>start:<\/strong> Pozycja pierwszego znaku<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>end:<\/strong> Pozycja ostatniego znaku<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">W tym samouczku przedstawiono kilka przyk\u0142ad\u00f3w praktycznego wykorzystania tej funkcji z nast\u0119puj\u0105c\u0105 ramk\u0105 danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('team_A', 'team_B', 'team_C', 'team_D'),\n                 conference=c('West', 'West', 'East', 'East'),\n                 dots=c(88, 97, 94, 104))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n    team conference points\n1 team_A West 88\n2 team_B West 97\n3 team_C East 94\n4 team_D East 104<\/strong><\/pre>\n<h2> <strong><span style=\"color: #000000;\">Przyk\u0142ad 1: Wyodr\u0119bnij podci\u0105g z ci\u0105gu<\/span><\/strong><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wyodr\u0119bni\u0107 podci\u0105g rozpoczynaj\u0105cy si\u0119 na pozycji 5 i ko\u0144cz\u0105cy na pozycji 6 dla ka\u017cdego ci\u0105gu w kolumnie \u201ezesp\u00f3\u0142\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (stringr)<\/span>\n\n<\/span><span style=\"color: #008080;\">#extract characters in positions 5 through 6 of 'team' column\n<\/span>str_sub(string=df$team, start= <span style=\"color: #008000;\">5<\/span> , end= <span style=\"color: #008000;\">6<\/span> )\n\n[1] \"_A\" \"_B\" \"_C\" \"_D\"\n<\/strong><\/pre>\n<h2> <strong><span style=\"color: #000000;\">Przyk\u0142ad 2: Wyodr\u0119bnij podci\u0105g do okre\u015blonej pozycji<\/span><\/strong><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wyodr\u0119bni\u0107 ka\u017cdy znak do pozycji 4 dla ka\u017cdego ci\u0105gu w kolumnie \u201ezesp\u00f3\u0142\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (stringr)<\/span>\n\n<\/span><span style=\"color: #008080;\">#extract all characters up to position 4 in 'team' column\n<\/span>str_sub(string=df$team, end= <span style=\"color: #008000;\">4<\/span> )\n\n[1] \"team\" \"team\" \"team\" \"team\"<\/strong><\/pre>\n<h2> <strong><span style=\"color: #000000;\">Przyk\u0142ad 3: Wyodr\u0119bnij podci\u0105g z okre\u015blonej pozycji<\/span><\/strong><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wyodr\u0119bni\u0107 ka\u017cdy znak po pozycji 3 dla ka\u017cdego ci\u0105gu w kolumnie \u201ezesp\u00f3\u0142\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (stringr)<\/span>\n\n<\/span><span style=\"color: #008080;\">#extract all characters after position 2 in 'team' column\n<\/span>str_sub(string=df$team, start= <span style=\"color: #008000;\">3<\/span> )\n\n[1] \"am_A\" \"am_B\" \"am_C\" \"am_D\"\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 4: Zamie\u0144 podci\u0105g w ci\u0105gu<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak zamieni\u0107 podci\u0105g zaczynaj\u0105cy si\u0119 na pozycji 1 i ko\u0144cz\u0105cy na pozycji 5 dla ka\u017cdego ci\u0105gu w kolumnie \u201ezesp\u00f3\u0142\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (stringr)<\/span>\n\n<\/span><span style=\"color: #008080;\">#replace all characters between position 1 and 5 in 'team' column\n<\/span>str_sub(string=df$team, start= <span style=\"color: #008000;\">1<\/span> , end= <span style=\"color: #008000;\">5<\/span> ) &lt;- 'TEAM'\n\n<span style=\"color: #008080;\">#view updated data frame<\/span>\ndf\n\n   team conference points\n1 TEAMA West 88\n2 TEAMB West 97\n3 TEAMC East 94\n4 TEAMD East 104<\/strong><\/pre>\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 j\u0119zyku R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/str_replace-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak u\u017cywa\u0107 str_replace w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/str_split-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak u\u017cywa\u0107 str_split w R<\/a><br \/> Jak u\u017cywa\u0107 str_detect w R<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Funkcja str_sub() pakietu stringr w R mo\u017ce zosta\u0107 u\u017cyta do wyodr\u0119bnienia lub zamiany podci\u0105g\u00f3w w ci\u0105gu. Ta funkcja wykorzystuje nast\u0119puj\u0105c\u0105 sk\u0142adni\u0119: str_sub(string, pocz\u0105tek, koniec) Z\u0142oto: ci\u0105g znak\u00f3w: wektor znakowy start: Pozycja pierwszego znaku end: Pozycja ostatniego znaku W tym samouczku przedstawiono kilka przyk\u0142ad\u00f3w praktycznego wykorzystania tej funkcji z nast\u0119puj\u0105c\u0105 ramk\u0105 danych: #create data frame df [&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-3329","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 u\u017cywa\u0107 str_sub w R (z przyk\u0142adami) \u2013 Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji str_sub w j\u0119zyku R, 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\/str_sub-w-r\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak u\u017cywa\u0107 str_sub w R (z przyk\u0142adami) \u2013 Statologia\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji str_sub w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/str_sub-w-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-18T01:38:17+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\/str_sub-w-r\/\",\"url\":\"https:\/\/statorials.org\/pl\/str_sub-w-r\/\",\"name\":\"Jak u\u017cywa\u0107 str_sub w R (z przyk\u0142adami) \u2013 Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-18T01:38:17+00:00\",\"dateModified\":\"2023-07-18T01:38:17+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 funkcji str_sub w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/str_sub-w-r\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/str_sub-w-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/str_sub-w-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak u\u017cywa\u0107 str_sub w r (z przyk\u0142adami)\"}]},{\"@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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