<\/p>\n
R’deki gsub()<\/a> i\u015flevi, R’deki bir dizedeki belirli bir modelin t\u00fcm olu\u015fumlar\u0131n\u0131 de\u011fi\u015ftirmek i\u00e7in kullan\u0131labilir.<\/span><\/p>\n Birden fazla modeli ayn\u0131 anda de\u011fi\u015ftirmek i\u00e7in i\u00e7 i\u00e7e gsub()<\/strong> ifadesini kullanabilirsiniz:<\/span><\/p>\n Ancak \u00e7ok daha h\u0131zl\u0131 bir y\u00f6ntem, stringi<\/strong> paketindeki a\u015fa\u011f\u0131daki s\u00f6zdizimini kullanan stri_replace_all_regex()<\/strong> i\u015flevidir:<\/span><\/p>\n A\u015fa\u011f\u0131daki \u00f6rnekler her y\u00f6ntemin pratikte nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6stermektedir.<\/span><\/p>\n R’de a\u015fa\u011f\u0131daki veri \u00e7er\u00e7evesine sahip oldu\u011fumuzu varsayal\u0131m:<\/span><\/p>\n Ad<\/strong> s\u00fctunundaki birden \u00e7ok modeli de\u011fi\u015ftirmek i\u00e7in i\u00e7 i\u00e7e gsub()<\/strong> ifadesini kullanabiliriz:<\/span><\/p>\n Ad<\/strong> s\u00fctunundaki A, B ve C’nin tamam\u0131n\u0131n yeni de\u011ferlerle de\u011fi\u015ftirildi\u011fini unutmay\u0131n.<\/span><\/p>\n Birden \u00e7ok modeli de\u011fi\u015ftirmenin \u00e7ok daha h\u0131zl\u0131 bir yolu, stringi<\/strong> paketindeki stri_replace_all_regex()<\/strong> i\u015flevini kullanmakt\u0131r.<\/span><\/p>\n A\u015fa\u011f\u0131daki kod bu i\u015flevin nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n Ortaya \u00e7\u0131kan veri \u00e7er\u00e7evesinin \u00f6nceki \u00f6rnektekiyle e\u015fle\u015fti\u011fine dikkat edin.<\/span><\/p>\n Veri \u00e7er\u00e7eveniz orta derecede b\u00fcy\u00fckse, bu i\u015flevin gsub()<\/strong> i\u015flevinden \u00e7ok daha h\u0131zl\u0131 oldu\u011funu fark edeceksiniz.<\/span><\/p>\n A\u015fa\u011f\u0131daki e\u011fitimlerde R’de di\u011fer yayg\u0131n i\u015flemlerin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r:<\/span><\/p>\n R’de replacement() i\u015flevi nas\u0131l kullan\u0131l\u0131r?<\/a> R’deki gsub() i\u015flevi, R’deki bir dizedeki belirli bir modelin t\u00fcm olu\u015fumlar\u0131n\u0131 de\u011fi\u015ftirmek i\u00e7in kullan\u0131labilir. Birden fazla modeli ayn\u0131 anda de\u011fi\u015ftirmek i\u00e7in i\u00e7 i\u00e7e gsub() ifadesini kullanabilirsiniz: df$col1 <- gsub(‘ old1 ‘, ‘ new1 ‘, gsub(‘ old2 ‘, ‘ new2 ‘, gsub(‘ old3 ‘, ‘ new3 ‘, df$col1))) Ancak \u00e7ok daha h\u0131zl\u0131 bir y\u00f6ntem, stringi paketindeki […]<\/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-2576","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\n df$col1 <- gsub(' old1<\/span> ', ' new1<\/span> ',\n gsub(' old2<\/span> ', ' new2<\/span> ',\n gsub(' old3<\/span> ', ' new3<\/span> ', df$col1)))\n<\/strong><\/pre>\n library<\/span> (stringi)\n\ndf$col1 <- stri_replace_all_regex(df$col1,\n pattern=c(' old1<\/span> ', ' old2<\/span> ', ' old3<\/span> '),\n replacement=c(' new1<\/span> ', ' new2<\/span> ', ' new3<\/span> '),\n vectorize= FALSE<\/span> )<\/strong><\/pre>\n Y\u00f6ntem 1: Birden fazla \u015fablonu i\u00e7 i\u00e7e ge\u00e7mi\u015f gsub() ile de\u011fi\u015ftirin<\/strong><\/span><\/h3>\n
#create data frame\n<\/span>df <- data. frame<\/span> (name=c('A', 'B', 'B', 'C', 'D', 'D'),\n dots=c(24, 26, 28, 14, 19, 12))\n\n#view data frame\n<\/span>df\n\n name points\n1 to 24\n2 B 26\n3 B 28\n4 C 14\n5 D 19\n6 D 12<\/span><\/span><\/strong><\/pre>\n #replace multiple patterns in name column\n<\/span>df$name <- gsub(' A<\/span> ', ' Andy<\/span> ',\n gsub(' B<\/span> ', ' Bob<\/span> ',\n gsub(' C<\/span> ', ' Chad<\/span> ', df$name)))\n\n#view updated data frame\n<\/span>df\n\n name points\n1Andy 24\n2 Bob 26\n3 Bob 28\n4 Chad 14\n5 D 19\n6 D 12<\/span><\/span><\/strong><\/pre>\n Y\u00f6ntem 2: Birden \u00e7ok modeli stringi ile de\u011fi\u015ftirin<\/strong><\/span><\/h3>\n
library<\/span> (stringi)\n\n#replace multiple patterns in name column\n<\/span>df$name <- stri_replace_all_regex(df$name,\n pattern=c(' A<\/span> ', ' B<\/span> ', ' C<\/span> '),\n replacement=c(' Andy<\/span> ', ' Bob<\/span> ', ' Chad<\/span> '),\n vectorize= FALSE<\/span> )\n\n#view updated data frame<\/span>\ndf\n\n name points\n1Andy 24\n2 Bob 26\n3 Bob 28\n4 Chad 14\n5 D 19\n6 D 12\n<\/strong><\/pre>\n Ek kaynaklar<\/strong><\/span><\/h3>\n
R veri \u00e7er\u00e7evesindeki de\u011ferler ko\u015fullu olarak nas\u0131l de\u011fi\u015ftirilir?<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"