Dear R friends, I have a data frame, I need to get a time interval between the two columns. The times are recorded in 24 hour clock. My data frame is called version.one. my commands are: t.s.one<-paste(version.one[,9]) t.s.two<-paste(version.one[,61]) x<-strptime(t.s.one,format="%H:%M") x y<-strptime(t.s.two ,format="%H:%M") y z<-difftime(y,x, units = "mins") z
But now in my z object i have negative numbers. Would you please let me know why? And how can I get rid of this problem? Thanks Mitra [[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.