by considering this example from barley dataset
#code start
dotplot(variety ~ yield | site, data = barley,
scales=list(x=list(log=TRUE)),
layout = c(1,6),
panel = function(...) {
panel.dotplot(...)
#median.values <- tapply(x, y, median) # medians for each
variety
#panel.abline(v=median.values, col.line="red") # but this is not
working!
#panel.curve(...) # how to properly
set this?
}
)
#code end
I want to plot as a reference vertical line the medians for each panel
I’ve been reading in
https://stat.ethz.ch/pipermail/r-help/2009-January/185384.html
that it’s not possible with panel.abline() and it’s probably necessary to
use panel.curve() instead; unfortunately I can’t figure (manage) how, any
help for this?
thank you
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