Hi,
Now i am dealing with longitudinal data set and I want to see the rough
marginal plot for 2 variables separately.
I found the code from one example here,
reading <-
read.table("http://www.ats.ucla.edu/stat/R/examples/alda/data/reading_pp.txt";,
header=T, sep=",")
reading[reading$id %in% c(4, 27, 31, 33, 41, 49, 69, 77, 87), ]
xyplot(piat~age | id
, data=reading[reading$id %in% c(4, 27, 31, 33, 41, 49, 69, 77, 87),
],panel=function(x,y,*subscripts*){
panel.xyplot(x, y, pch=16)
panel.lmline(x,y, lty=4)
panel.xyplot(reading$agegrp*[subscripts]*, y, pch=3)
panel.lmline(reading$agegrp*[subscripts]*,y)
}
, ylim=c(0, 80), as.table=T, *subscripts*=T)
I just don't know what the subscripts for and the meaning of that.
Can someone kindly let me know how it works.
Thanks
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