Christopher W. Ryan <cryan <at> binghamton.edu> writes: > > I can't seem to find just what I'm looking for in R help, Everitt and > Hothorn HSAUR, Murrell's book, or the R graphics gallery at > http://addictedtor.free.fr/graphiques/. Probably not looking > efficiently, but anyway, > > If my data look like this: > > > head(data) > cat startyear studentid > 1 other 2001 12 > 2 UHS 2001 17 > 3 Lourdes 2001 10 > 4 Endwell 2001 3 > 5 other 2002 13 > 6 UHS 2002 19 > > > > What is the easiest way to make a line graph like this (made this one in > Stata): > > http://bingweb.binghamton.edu/~cryan/Workload.png > > Thank you.
assuming "studentid" is your students, library(lattice) xyplot(studentid~startyear,groups=cat,auto.key=TRUE,type="l",data=data) (I think -- haven't tested at all) that, or reshape the data to wide format and use matplot. Ben Bolker ______________________________________________ [email protected] 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.
