To get the averages, look at ?tapply or ?aggregate To exclude parts of the data look at ?subset
To remove the spaces in the lines around points look at ?matplot and ?plot specifically look for type='o' To add a legend look at ?legend. You may also want to look at the lattice package, using xyplot with panel.superpose may work better for you (or may not). Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare [EMAIL PROTECTED] (801) 408-8111 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Tirrell Sent: Wednesday, May 31, 2006 2:35 PM To: [email protected] Subject: [R] follow-up Hi, I've been able to get the data _of every individual_ into a graph (there are 16 lines), but I have a few more questions... How do I neatly get the average weights of each group (PC3/CO, PC3/FO, FADU/CO and FADU/FO) and make a graph of four lines. How do I exclude the first column (which is each animal's internal description) - there is a spot on the x axis labeled 1 - that is blank and presumably for that. I think that explains why I get 17 "NAs introduced by coercion" in warnings(). How do I add an argument to matplot() telling it to include a legend? How do I instruct R to produce a graph that doesn't leave a space to either side of the data point before the line is drawn? I'll continue trying to work these out. Thanks, Rob [[alternative HTML version deleted]] ______________________________________________ [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 ______________________________________________ [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
