lattice ltext
Troels Ring wrote:
Dear friends - please give me a hand.
I have a dataset of 40 patients in two groups observed on three
occasions. I only want to plot a line
for each patient in the two groups. I use the ltext function to put the
patient number but fail to make lattice understand the numbers as
unique since apparently it starts all over with 1:20 for each panel
instead of respecting my desires to have 1:20 and then 21:40.
I'm on windows vista, R2.9.2
Best wishes
Troels
score <- runif(120,0,100)
pt <- gl(40,3,120)
times <- rep(c(0,3,6),40)
trt <- gl(2,60,120)
ach <- data.frame(score=score,pt=pt,times=times,trt=trt)
myPanel <- function(x,y,...){
panel.xyplot(x,y,...)
ltext(x-.1,y+1,paste(pt),cex=0.5) }
xyplot(score~times|trt,groups=pt,type=c("p","l"),ach,
panel=myPanel)
You'll need subscripts:
myPanel <- function(x,y,subscripts,groups,...){
panel.superpose(x,y,subscripts,groups,...)
ltext(x-.1,y+1,as.character(groups)[subscripts],cex=0.5)}
xyplot(score~times|trt, groups=pt, type=c("p","l"),
data=ach, panel=myPanel)
-Peter Ehlers
Peter Ehlers University of Calgary