Hi Ruser
I'm trying to replicate some SAS code. I have to add a spline to my
longitudinal spaghetti plot.
I have the plot, but I can't add the spline, a overall trend line. In
the SAS code they use the command 'I=SM50S' and I would prefer
something similar. I’m using R 2.10.1 on windows XP…
I have made this working example.
tolerance.pp <- read.table("http://www.ats.ucla.edu/stat/R/examples/alda/tolerance1_pp.txt
", sep=",", header=T)
# install.packages("lattice", dep = T)
library(lattice)
xyplot(tolerance ~ age, groups = id, data=tolerance.pp, type = "l")
This is where I want to add a overall spline.
Hope someone out there can figure this out.
Thanks
Eric
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