Mark Knecht wrote (09.Sep.2009 at 10:43 -0700): > Sometimes it's the simple things... > > Why doesn't this lag X$x by 3 and place it in X$x1? (i.e. - Na's in > the first 3 rows and then values showing up...) > > The help page does talk about time series. If lag doesn't work on > data.frame columns then what would be the right function to use to lag > by a variable amount? > > Thanks, > Mark > > > X=data.frame(x=seq(1:10)) > X$x1=lag(X$x, 3) > X >
I think the embed function might be helpful for you, embed(1:10 , dimension = 3) Best, AS ______________________________________________ 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.
