Hi, Try this: dat1<-read.table(text=" id date a b c y 1 1 8/6/2008 Red 15 B 22 2 1 8/6/2008 Green 15 B 22 ",sep="",header=TRUE) dat1$date<-with(dat1,as.factor(date)) dat1 id date a b c y 1 1 8/6/2008 Red 15 B 22 2 1 8/6/2008 Green 15 B 22 is.factor(dat1$date) [1] TRUE A.K.
----- Original Message ----- From: Yolande Tra <yolande....@gmail.com> To: r-help@r-project.org Cc: Sent: Friday, July 20, 2012 10:44 AM Subject: [R] convert date to a factor Hello, I would like to convert date as a factor to represent time in a repeated measure situation in the following code. How would I do that? > d <- read.csv(file.path(dataDir,"data.csv"), as.is=T,stringsAsFactors = FALSE) > d[1:2,] id date a b c y 1 1 8/6/2008 Red 15 B 22 2 1 8/6/2008 Green 15 B 22 Thank you, Y [[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.