Ben-- worked perfectly. Thank you. My first real experience with lattice graphics.
--Chris Christopher W. Ryan, MD SUNY Upstate Medical University Clinical Campus at Binghamton 40 Arch Street, Johnson City, NY 13790 cryanatbinghamtondotedu PGP public keys available at http://home.stny.rr.com/ryancw/ "If you want to build a ship, don't drum up the men to gather wood, divide the work and give orders. Instead, teach them to yearn for the vast and endless sea." [Antoine de St. Exupery] Ben Bolker wrote: > 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 > > ______________________________________________ > 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.