Hi Marion, Try this:
set.seed(123) mydf=data.frame(trips=rpois(10,5), matrix(rnorm(10*5),ncol=5)) mydf sapply(mydf[,-1],rep,mydf[,1]) HTH, Jorge On Wed, May 7, 2008 at 11:41 PM, <[EMAIL PROTECTED]> wrote: > > > Hi, > > I have a data matrix in which there are 1000 rows by 30 columns. The > first > column of each row is a numeric indicating the number of trips taken to a > particular location with location attributes in the following column > entries for > that row. > > I want to repeat each row based on the number of trips taken (as indicated > by > the number in the first column)...i.e., if 1,1 indicates 4 trips, I want > to > replicate row 1 four times, and do this for each entry of column 1. > > I have played with rep command with little luck. Can anyone help? This is > probably very simple. > > Thank you, > > mw > > > Marion Wittmann, Ph.D. candidate > Environmental Science and Management > University of California > Santa Barbara, CA 93106-5131 > > ______________________________________________ > 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. [[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.
