Hi
Without a reproducible example I am only guessing
Try this
xyplot(threshold ~ age |frequency.a, data=subset(rage !is.na(threshold} &
!is.na(age)),
groups = HL,
cex=0.5,
layout=c(7,4),
par.strip.tex=list(cex=0.8),
xlab="Age (years)",
ylab="Threshold
I perhaps should have added a stronger warning here; note that the model
fitting in my previous post (below) uses explicit initial breakpoints for
segmented (specifically, c(30,60) at line 1 of the get.segments() ). if you
know where yours are, substitute them there. Otherwise, you'd need to us
There isn't an abline method for segmented, and even if there were you'd need
segments() for a segmented line plot. You're going to have to roll your own.
That will need a function to extract the break locations and predicted values
at those points
I don't have your data, so I can't do one spe
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