On Tue, May 8, 2012 at 12:14 PM, Apoorva Gupta <apoorva.ni...@gmail.com> wrote: > I have checked that. It allows me to get the t-1, t-2 value but not the t+1 > value. > Is there any other way of achieving this other than using the plm package? > It would be easier to help if you provided a minimal reproducible example, as requested in the posting guide. Have you tried diff(x, lag = -1, ...)
or lag(x, k = -1, ...) Perhaps this does what you want. Regards Liviu ______________________________________________ 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.