{"id":3053,"date":"2023-07-19T10:50:48","date_gmt":"2023-07-19T10:50:48","guid":{"rendered":"https:\/\/statorials.org\/tr\/rdeki-str_extract\/"},"modified":"2023-07-19T10:50:48","modified_gmt":"2023-07-19T10:50:48","slug":"rdeki-str_extract","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/rdeki-str_extract\/","title":{"rendered":"R&#39;de str_extract nas\u0131l kullan\u0131l\u0131r (\u00f6rneklerle)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">R&#8217;deki <a href=\"https:\/\/stringr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">stringr<\/a> paketinin <strong>str_extract()<\/strong> i\u015flevi, e\u015fle\u015fen desenleri bir dizeye \u00e7\u0131karmak i\u00e7in kullan\u0131labilir.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Bu i\u015flev a\u015fa\u011f\u0131daki s\u00f6zdizimini kullan\u0131r:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>str_extract(string, pattern)<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Alt\u0131n:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>dize:<\/strong> karakter vekt\u00f6r\u00fc<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>desen:<\/strong> \u00c7\u0131kar\u0131lacak desen<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki \u00f6rnekler bu fonksiyonun pratikte nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6stermektedir.<\/span><\/p>\n<h3> <strong><span style=\"color: #000000;\">\u00d6rnek 1: Bir dizeden desen \u00e7\u0131karma<\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki kod, &#8220;ther&#8221; dizesinin R&#8217;deki belirli bir dizeden nas\u0131l \u00e7\u0131kar\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/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#define string\n<span style=\"color: #000000;\">some_string &lt;- \"Hey there my name is Doug\"\n<\/span>\n#extract \"ther\" from string\n<span style=\"color: #000000;\">str_extract(some_string, \" <span style=\"color: #ff0000;\">ther<\/span> \")\n\n[1] \u201cother\u201d<\/span><\/span>\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">&#8220;Oradaki&#8221; kal\u0131b\u0131 dizeden ba\u015far\u0131yla \u00e7\u0131kar\u0131ld\u0131.<\/span><\/p>\n<p> <span style=\"color: #000000;\">E\u011fer dizide bulunmayan bir modeli \u00e7\u0131karmaya \u00e7al\u0131\u015f\u0131rsak, sonu\u00e7 olarak <strong>NA<\/strong> alaca\u011f\u0131m\u0131z\u0131 unutmay\u0131n:<\/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#define string\n<span style=\"color: #000000;\">some_string &lt;- \"Hey there my name is Doug\"\n<\/span>\n#attempt to extract \"apple\" from string\n<span style=\"color: #000000;\">str_extract(some_string, \" <span style=\"color: #ff0000;\">apple<\/span> \")\n\n[1] NA<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Dizede &#8220;elma&#8221; modeli mevcut olmad\u0131\u011f\u0131ndan bir <strong>NA<\/strong> de\u011feri d\u00f6nd\u00fcr\u00fcld\u00fc.<\/span><\/p>\n<h3> <strong><span style=\"color: #000000;\">\u00d6rnek 2: Bir dizeden say\u0131sal de\u011ferleri \u00e7\u0131karma<\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki kod, bir dizeden yaln\u0131zca say\u0131sal de\u011ferleri \u00e7\u0131karmak i\u00e7in <strong>\\\\d+<\/strong> normal ifadesinin nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/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#define string\n<span style=\"color: #000000;\">some_string &lt;- \"There are 350 apples over there\"\n<\/span>\n#extract only numeric values from string\n<span style=\"color: #000000;\">str_extract(some_string, \" <span style=\"color: #ff0000;\">\\\\d+<\/span> \")\n\n[1] \"350\"\n<\/span><\/span><\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>\u00d6rnek 3: Bir dizi vekt\u00f6r\u00fcnden karakterleri \u00e7\u0131karma<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki kod, yaln\u0131zca bir dize vekt\u00f6r\u00fcnden karakterleri ay\u0131klamak i\u00e7in <strong>[az]+<\/strong> normal ifadesinin nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/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#define vector of strings\n<span style=\"color: #000000;\">some_strings &lt;- c(\"4 apples\", \"3 bananas\", \"7 oranges\")\n\n<\/span>#extract only characters from each string in vector\n<span style=\"color: #000000;\">str_extract(some_strings, \u201c <span style=\"color: #ff0000;\">[az]+<\/span> \u201d)\n\n[1] \u201capples\u201d \u201cbananas\u201d \u201coranges\u201d\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Yaln\u0131zca her dizedeki karakterlerin d\u00f6nd\u00fcr\u00fcld\u00fc\u011f\u00fcn\u00fc unutmay\u0131n.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Ek kaynaklar<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki e\u011fitimlerde R&#8217;de di\u011fer ortak g\u00f6revlerin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/tr\/rde-str_degistir\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de str_replace nas\u0131l kullan\u0131l\u0131r<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/rde-str_split\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de str_split nas\u0131l kullan\u0131l\u0131r?<\/a><br \/> R&#8217;de str_detect nas\u0131l kullan\u0131l\u0131r?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>R&#8217;deki stringr paketinin str_extract() i\u015flevi, e\u015fle\u015fen desenleri bir dizeye \u00e7\u0131karmak i\u00e7in kullan\u0131labilir. Bu i\u015flev a\u015fa\u011f\u0131daki s\u00f6zdizimini kullan\u0131r: str_extract(string, pattern) Alt\u0131n: dize: karakter vekt\u00f6r\u00fc desen: \u00c7\u0131kar\u0131lacak desen A\u015fa\u011f\u0131daki \u00f6rnekler bu fonksiyonun pratikte nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6stermektedir. \u00d6rnek 1: Bir dizeden desen \u00e7\u0131karma A\u015fa\u011f\u0131daki kod, &#8220;ther&#8221; dizesinin R&#8217;deki belirli bir dizeden nas\u0131l \u00e7\u0131kar\u0131laca\u011f\u0131n\u0131 g\u00f6sterir: library (stringr) #define string [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-3053","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.3 - 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