Hi: Perhaps this is what you were looking for:
densityplot(Age ~ Year, data = ages, group = ID, plot.points = FALSE) HTH, Dennis On Thu, Jan 21, 2010 at 7:30 AM, Yi Du <abraham...@gmail.com> wrote: > Hi, > > > I have a data set about age from 2006 to 2009 for certain individual. I > would like to draw the kernel density estimation to age for each year. But > I > don't know how to draw the different plots in one graph. > > The data looks like: > Year ID Age > 2006 1 20 > 2006 2 30 > 2007 1 21 > 2007 2 31 > 2008 1 22 > 2009 1 23 > > I first use hist(age) to draw the histogram for age, then use > lines(density(age)) to draw its kernel. But since I need to draw the four > years kernel for age in one graph, I don't need the hist. I also tried the > package lattice of kernelplot, But I still don't know how to draw the four > years kernel in one graph. Also, I don't need the rug(age) in kernelplot, > how can I delete it? > > Thanks. > > -- > Yi Du > > [[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. > [[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.
