<\/p>\n
R taban\u0131ndaki ifelse()<\/strong> i\u015flevi, tarih nesnelerini varsay\u0131lan olarak say\u0131sal nesnelere d\u00f6n\u00fc\u015ft\u00fcr\u00fcr.<\/span><\/p>\n Bunun olmas\u0131n\u0131 \u00f6nlemek i\u00e7in alternatif olarak a\u015fa\u011f\u0131daki y\u00f6ntemlerden birini kullanabilirsiniz:<\/span><\/p>\n Y\u00f6ntem 1: Base R’de as.character() i\u015flevini kullan\u0131n<\/strong><\/span><\/p>\n Y\u00f6ntem 2: dplyr’de if_else() i\u015flevini kullan\u0131n<\/strong><\/span><\/p>\n Y\u00f6ntem 3: data.table’da fifelse() i\u015flevini kullan\u0131n<\/strong><\/span><\/p>\n A\u015fa\u011f\u0131daki \u00f6rnekler, R’deki a\u015fa\u011f\u0131daki veri \u00e7er\u00e7evesiyle her y\u00f6ntemin pratikte nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n A\u015fa\u011f\u0131daki kod, veri \u00e7er\u00e7evesinin tarih<\/strong> s\u00fctununda bir if else ifadesi ger\u00e7ekle\u015ftirmek ve sonu\u00e7 olarak bir tarih \u00fcretmek i\u00e7in as.character()<\/strong> i\u015flevinin R base ifelse()<\/strong> i\u015fleviyle nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n Tarih<\/strong> s\u00fctunundaki bir de\u011fer 20.01.2022 tarihinden \u00f6nceyse tarihe be\u015f g\u00fcn ekledik.<\/span><\/span><\/p>\n Tarih<\/strong> s\u00fctununun say\u0131 bi\u00e7imine d\u00f6n\u00fc\u015ft\u00fcr\u00fclmek yerine tarih bi\u00e7imini korudu\u011funu unutmay\u0131n.<\/span><\/p>\n A\u015fa\u011f\u0131daki kod, veri \u00e7er\u00e7evesindeki tarih<\/strong> s\u00fctununda bir if else ifadesini ger\u00e7ekle\u015ftirmek ve sonu\u00e7 olarak bir tarih \u00fcretmek i\u00e7in dplyr’in if_else()<\/strong> i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n Tarih<\/strong> s\u00fctunundaki bir de\u011fer 20.01.2022 tarihinden \u00f6nceyse tarihe be\u015f g\u00fcn ekledik.<\/span><\/p>\n Tarih<\/strong> s\u00fctununun say\u0131 bi\u00e7imine d\u00f6n\u00fc\u015ft\u00fcr\u00fclmek yerine tarih bi\u00e7imini korudu\u011funu unutmay\u0131n.<\/span><\/p>\n A\u015fa\u011f\u0131daki kod, veri \u00e7er\u00e7evesindeki tarih<\/strong> s\u00fctununda bir if else ifadesini ger\u00e7ekle\u015ftirmek ve sonu\u00e7 olarak bir tarih \u00fcretmek i\u00e7in data.table’\u0131n fifelse()<\/strong> i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n Tarih<\/strong> s\u00fctunundaki bir de\u011fer 20.01.2022 tarihinden \u00f6nceyse tarihe be\u015f g\u00fcn ekledik.<\/span><\/p>\n Tarih<\/strong> s\u00fctunu yine say\u0131 bi\u00e7imine d\u00f6n\u00fc\u015ft\u00fcr\u00fclmek yerine tarih bi\u00e7imini korudu.<\/span><\/p>\n Not<\/strong> : \u00c7ok b\u00fcy\u00fck veri \u00e7er\u00e7eveleri i\u00e7in dplyr ve data.table y\u00f6ntemleri temel R y\u00f6nteminden daha h\u0131zl\u0131 olacakt\u0131r.<\/span><\/p>\n A\u015fa\u011f\u0131daki e\u011fitimlerde R’de di\u011fer ortak g\u00f6revlerin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r:<\/span><\/p>\n R’de yuvalanm\u0131\u015f If Else ifadesi nas\u0131l yaz\u0131l\u0131r?<\/a> R taban\u0131ndaki ifelse() i\u015flevi, tarih nesnelerini varsay\u0131lan olarak say\u0131sal nesnelere d\u00f6n\u00fc\u015ft\u00fcr\u00fcr. Bunun olmas\u0131n\u0131 \u00f6nlemek i\u00e7in alternatif olarak a\u015fa\u011f\u0131daki y\u00f6ntemlerden birini kullanabilirsiniz: Y\u00f6ntem 1: Base R’de as.character() i\u015flevini kullan\u0131n df$date <- as. Date (ifelse(df$date < ‘ 2022-01-20 ‘, as. character (df$date+5), as. character (df$date))) Y\u00f6ntem 2: dplyr’de if_else() i\u015flevini kullan\u0131n df$date <- if_else(df$date < ‘ 2022-01-20 […]<\/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-3899","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\n df$date <- as. Date<\/span> (ifelse(df$date < ' 2022-01-20<\/span> ',\n as. character<\/span> (df$date+5),\n as. character<\/span> (df$date)))<\/strong><\/pre>\n df$date <- if_else(df$date < ' 2022-01-20<\/span> ', df$date+5, df$date)<\/strong><\/pre>\n df$date <- fifelse(df$date < ' 2022-01-20<\/span> ', df$date+5, df$date)<\/strong><\/pre>\n #create data frame<\/span>\ndf <- data. frame<\/span> (date=as. Date<\/span> (c('2022-01-05', '2022-01-17', '2022-01-22',\n '2022-01-23', '2022-01-29', '2022-02-13')),\n sales=c(22, 35, 24, 20, 16, 19))\n\n#view data frame\n<\/span>df\n\n dirty date\n1 2022-01-05 22\n2 2022-01-17 35\n3 2022-01-22 24\n4 2022-01-23 20\n5 2022-01-29 16\n6 2022-02-13 19\n<\/strong><\/pre>\n \u00d6rnek 1: R Taban\u0131nda as.character() i\u015flevini kullan\u0131n<\/strong><\/span><\/h2>\n
#if date is before 2022-01-20 then add 5 days<\/span>\ndf$date <- as. Date<\/span> (ifelse(df$date < ' 2022-01-20<\/span> ',\n as. character<\/span> (df$date+5),\n as. character<\/span> (df$date)))\n\n#view updated data frame<\/span>\ndf\n\n dirty dates\n1 2022-01-10 22\n2 2022-01-22 35\n3 2022-01-22 24\n4 2022-01-23 20\n5 2022-01-29 16\n6 2022-02-13 19\n<\/strong><\/pre>\n \u00d6rnek 2: dplyr’de if_else() i\u015flevini kullan\u0131n<\/strong><\/span><\/h2>\n
library<\/span> (dplyr)<\/span>\n\n#if date is before 2022-01-20 then add 5 days<\/span>\ndf$date <- if_else(df$date < ' 2022-01-20<\/span> ', df$date+5, df$date)\n\n#view updated data frame<\/span>\ndf\n\n dirty date\n1 2022-01-10 22\n2 2022-01-22 35\n3 2022-01-22 24\n4 2022-01-23 20\n5 2022-01-29 16\n6 2022-02-13 19\n<\/strong><\/pre>\n \u00d6rnek 3: data.table’da fifelse() i\u015flevini kullan\u0131n<\/strong><\/span><\/h2>\n
library<\/span> (data.table)<\/span>\n\n#if date is before 2022-01-20 then add 5 days<\/span>\ndf$date <- fifelse(df$date < ' 2022-01-20<\/span> ', df$date+5, df$date)\n\n#view updated data frame<\/span>\ndf\n\n dirty dates\n1 2022-01-10 22\n2 2022-01-22 35\n3 2022-01-22 24\n4 2022-01-23 20\n5 2022-01-29 16\n6 2022-02-13 19\n<\/strong><\/pre>\n Ek kaynaklar<\/strong><\/span><\/h2>\n
R’de bir vaka ifadesi nas\u0131l yaz\u0131l\u0131r<\/a>
R’de veri \u00e7er\u00e7evesine birden fazla s\u00fctun nas\u0131l eklenir<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"