Also see Hadley Wickham's reshape package for more bells & whistles. -- HTH! Jim Porzak Loyalty Matrix Inc.
On 9/8/05, Thomas Lumley <[EMAIL PROTECTED]> wrote: > > This is what reshape() does. > > -thomas > > On Thu, 8 Sep 2005, Marc Bernard wrote: > > > Dear All, > > > > I would be grateful if you can help me. My problem is the following: > > I have a data set like: > > > > ID time X1 X2 > > 1 1 x111 x211 > > 1 2 x112 x212 > > 2 1 x121 x221 > > 2 2 x122 x222 > > 2 3 x123 x223 > > > > where X1 and X2 are 2 covariates and "time" is the time of observation and > > ID indicates the cluster. > > > > I want to merge the above data by creating a new variable "X" and "type" > > as follows: > > > > ID time X type > > 1 1 x111 X1 > > 1 2 x112 X1 > > 1 1 x211 X2 > > 1 2 x212 X2 > > 2 1 x121 X1 > > 2 2 x122 X1 > > 2 3 x123 X1 > > 2 1 x221 X2 > > 2 2 x222 X2 > > 2 3 x223 X2 > > > > > > Where "type" is a factor variable indicating if the observation is related > > to X1 or X2... > > > > Many thanks in advance, > > > > Bernard > > > > > > --------------------------------- > > > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@stat.math.ethz.ch mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide! > > http://www.R-project.org/posting-guide.html > > > > Thomas Lumley Assoc. Professor, Biostatistics > [EMAIL PROTECTED] University of Washington, Seattle > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html