{"id":3874,"date":"2023-07-15T01:07:34","date_gmt":"2023-07-15T01:07:34","guid":{"rendered":"https:\/\/statorials.org\/pl\/r-wyodrebnij-numer-kanalu\/"},"modified":"2023-07-15T01:07:34","modified_gmt":"2023-07-15T01:07:34","slug":"r-wyodrebnij-numer-kanalu","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/r-wyodrebnij-numer-kanalu\/","title":{"rendered":"Jak wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w w r (z przyk\u0142adami)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Aby wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w znak\u00f3w w R, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Metoda 1: Wyodr\u0119bnij numer ci\u0105gu przy u\u017cyciu podstawy R<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>as. <span style=\"color: #3366ff;\">numeric<\/span> (gsub(\" <span style=\"color: #ff0000;\">\\\\D<\/span> \", \"\", df$my_column))<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metoda 2: Wyodr\u0119bnij numer ci\u0105gu za pomoc\u0105 pakietu readr<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (readr)\n\nparse_number(df$my_column)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">W tym samouczku wyja\u015bniono, jak w praktyce u\u017cywa\u0107 ka\u017cdej metody z nast\u0119puj\u0105c\u0105 ramk\u0105 danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'A', 'A', 'B', 'B', 'B'),\n                 position=c('Guard23', 'Guard14', '2Forward',\n                            'Guard25', '6Forward', 'Center99'))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  team position\n1A Guard23\n2A Guard14\n3 A 2Forward\n4 B Guard25\n5 B 6Forward\n6 B Center99\n<\/strong><\/span><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Wyodr\u0119bnij liczb\u0119 z ci\u0105gu znak\u00f3w przy u\u017cyciu podstawy R<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wyodr\u0119bni\u0107 liczby z ka\u017cdego ci\u0105gu znak\u00f3w w kolumnie <strong>pozycji<\/strong> ramki danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#extract number from each string in 'position' column\n<\/span>as. <span style=\"color: #3366ff;\">numeric<\/span> (gsub(\" <span style=\"color: #ff0000;\">\\\\D<\/span> \", \"\", df$position))\n\n[1] 23 14 2 25 6 99\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nale\u017cy pami\u0119ta\u0107, \u017ce warto\u015bci liczbowe zosta\u0142y wyodr\u0119bnione z ka\u017cdego ci\u0105gu znak\u00f3w w kolumnie <strong>pozycji<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : Funkcja <strong>gsub()<\/strong> po prostu zast\u0119puje wszystkie liczby nieb\u0119d\u0105ce liczbami ( \\\\D ) w ci\u0105gu znak\u00f3w pust\u0105 spacj\u0105. Powoduje to wyodr\u0119bnienie tylko liczb z ci\u0105gu.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Je\u015bli chcesz, mo\u017cesz tak\u017ce zapisa\u0107 te warto\u015bci liczbowe w nowej kolumnie w ramce danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create new column that contains numbers from each string in 'position' column\n<\/span>df$num &lt;- as. <span style=\"color: #3366ff;\">numeric<\/span> (gsub(\" <span style=\"color: #ff0000;\">\\\\D<\/span> \", \"\", df$position))\n\n<span style=\"color: #008080;\">#view updated data frame\n<\/span>df\n\n  team position number\n1A Guard23 23\n2A Guard14 14\n3 A 2Forward 2\n4 B Guard25 25\n5 B 6Forward 6\n6 B Center99 99\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2:<\/strong><\/span> <span style=\"color: #000000;\"><strong>Wyodr\u0119bnij liczb\u0119 z ci\u0105gu znak\u00f3w za pomoc\u0105 pakietu Reader<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak wyodr\u0119bni\u0107 liczby z ka\u017cdego ci\u0105gu znak\u00f3w w kolumnie <strong>pozycji<\/strong> ramki danych za pomoc\u0105 funkcji <strong>parse_number()<\/strong> z pakietu <a href=\"https:\/\/readr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">readr<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (readr)\n\n<span style=\"color: #008080;\">#extract number from each string in 'position' column\n<\/span>parse_number(df$position)\n\n[1] 23 14 2 25 6 99<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nale\u017cy pami\u0119ta\u0107, \u017ce warto\u015bci liczbowe zosta\u0142y wyodr\u0119bnione z ka\u017cdego ci\u0105gu znak\u00f3w w kolumnie <strong>pozycji<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Odpowiada to wynikom u\u017cycia funkcji <strong>gsub()<\/strong> w bazie R.<\/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 j\u0119zyku R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/r-wybierz-kolumny-zawierajace-ciag\/\" target=\"_blank\" rel=\"noopener\">Jak wybra\u0107 kolumny zawieraj\u0105ce okre\u015blony ci\u0105g w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/r-usun-znak-z-ciagu\/\" target=\"_blank\" rel=\"noopener\">Jak usun\u0105\u0107 znaki z ci\u0105gu w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/r-wyszukaj-znak-w-ciagu\/\" target=\"_blank\" rel=\"noopener\">Jak znale\u017a\u0107 lokalizacj\u0119 znaku w ci\u0105gu w R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aby wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w znak\u00f3w w R, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cych metod: Metoda 1: Wyodr\u0119bnij numer ci\u0105gu przy u\u017cyciu podstawy R as. numeric (gsub(&#8221; \\\\D &#8222;, &#8222;&#8221;, df$my_column)) Metoda 2: Wyodr\u0119bnij numer ci\u0105gu za pomoc\u0105 pakietu readr library (readr) parse_number(df$my_column) W tym samouczku wyja\u015bniono, jak w praktyce u\u017cywa\u0107 ka\u017cdej metody z nast\u0119puj\u0105c\u0105 ramk\u0105 danych: #create [&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-3874","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 wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w w R (z przyk\u0142adami) - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w znak\u00f3w 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\/r-wyodrebnij-numer-kanalu\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w w R (z przyk\u0142adami) - Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w znak\u00f3w w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/r-wyodrebnij-numer-kanalu\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-15T01:07:34+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\/r-wyodrebnij-numer-kanalu\/\",\"url\":\"https:\/\/statorials.org\/pl\/r-wyodrebnij-numer-kanalu\/\",\"name\":\"Jak wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w w R (z przyk\u0142adami) - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-15T01:07:34+00:00\",\"dateModified\":\"2023-07-15T01:07:34+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w znak\u00f3w w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/r-wyodrebnij-numer-kanalu\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/r-wyodrebnij-numer-kanalu\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/r-wyodrebnij-numer-kanalu\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak wyodr\u0119bni\u0107 liczby z ci\u0105g\u00f3w 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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