Hi,
library(car) set.seed(25) x1<- data.frame(id=sample(1:8,8,replace=FALSE),f1=LETTERS[1:8]) x1$id<-recode(x1$id,'5=1;6=2;7=3;8=4') x1 # id f1 #1 4 A #2 1 B #3 1 C #4 3 D #5 2 E #6 3 F #7 2 G #8 4 H A.K. ----- Original Message ----- From: Hui Du <hui...@dataventures.com> To: "r-help@r-project.org" <r-help@r-project.org> Cc: Sent: Monday, May 6, 2013 5:29 PM Subject: [R] replace data by a rule Hi All, I have data set like x = data.frame(id = 1:8, f1 = LETTERS[1:8]) I want to replace id 5, 6, 7, 8 by 1, 2, 3, 4 respectively. e.g the map is ID-1 ID-2 5 1 6 2 7 3 8 4 I have lots of data and rules. How to do it in a few lines rather than do them one by one like: x[x$id == 5,]$id = 1 x[x$id == 6,]$id = 2 etc. Thanks. HXD [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
