On Fri, Jul 16, 2010 at 12:38 PM, Erin Hodgess <erinm.hodg...@gmail.com> wrote: > I have several data sets, which begin early in 2002 and run until > yesterday. They do not have observations every day. For example: >> xd1[1:10] > 2002-02-25 2002-02-26 2002-02-28 2002-03-01 2002-03-04 2002-03-05 2002-03-07 > 7 8 1 9 12 3 5 > 2002-03-08 2002-03-11 2002-03-12 > 7 10 5 >> > > > I want to set up zoo series which has every day from 2002-01-01 > through yesterday. There should be zeros on the "non appearing" dates > and the previously seen values on the appearing dates. > > I've tried union and merge, but they didn't seem to work correctly. >
Try this: z <- zoo(c(7, 8, 1, 9, 12, 3, 5, 7, 10, 5), as.Date(c("2002-02-25", "2002-02-26", "2002-02-28", "2002-03-01", "2002-03-04", "2002-03-05", "2002-03-07", "2002-03-08", "2002-03-11", "2002-03-12"))) dd <- seq(start(z), end(z), "day") merge(z, zoo(,dd), fill = 0) Please try displaying your data using dput to make it easier to copy it into R. For example, dput(z) ______________________________________________ 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.