See last line to every message on r-help which in particular asks for reproducible code and in this case means include date and count. Note ?dput
This work for me: library(lattice) tt <- as.POSIXct(Sys.Date() + 1:10) y <- seq_along(tt) xyplot(y ~ tt) as does this: library(zoo) xyplot(zoo(cbind(y, y, y), tt)) On Mon, Sep 14, 2009 at 4:41 PM, Larry White <ljw1...@gmail.com> wrote: > Hi, > I'm trying to do something simple (I think) with lattice graphics. I want > to have three xyplots in a single column, where the x axis for the three is > a date range and the y axes are numeric. > > I tried doing the first chart, and ran into a problem. When I enter: > > xyplot (date ~ count) > > I get a well formed plot with the date on the y axis, but when I enter: > > xyplot (count ~ date) > > I get: "Error in as.POSIXct.default(X[[2L]], ...) : > do not know how to convert 'X[[2L]]' to class "POSIXlt" > > Is there a way to create an xyplot with the dates on the x axis? > > Thank you. > > Larry > > [[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. > ______________________________________________ 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.