Dear R Users,
I have an xyplot() where different plotting symbols are used for subgroups (originally used within S-Plus, but hopefully itīs also applicable to R users).
How can I fit separate regression lines for every subgroup? So far, I can only plot the overall fitted line.
The code looks like this:
trellis.device()
sps<-trellis.par.get("superpose.symbol")
sps$pch<-1:7
trellis.par.set("superpose.symbol",sps)spl <- trellis.par.get("superpose.line") ps$lty <- 1:7 trellis.par.set("superpose.line",spl) xyplot(a~b|factor+treatment,
groups=external,data=ownframe,layout=c(2,2),
panel=function(x,y,subscripts,...){panel.superpose(x,y,subscripts,...);panel.lmline(x,y)})
Thank you very much for your help!
Regards Christioph
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