[R] lattice dotplot labelling median and mean values for each panel

[maxbre]

By considering this reproducible example

#start code
library(lattice)

dotplot(variety ~ yield | site, data = barley, 
        layout = c(1,6),
        index.cond= function(x,y){median(x)},
        panel = function(x,y,...) { 
          panel.dotplot(x,y,...) 
          median.values <- median(x) 
          panel.abline(v=median.values, col.line="red")
          mean.values<-mean(x)
          panel.abline(v=mean.values, col.line="blue")
          #panel.text()  #?
        }) 

#end code

I would like to add a label showing respectively the median (red vertical
line) and the mean (blue vertical line)  for each panel and possibly tweak
the label positions so that they do not overlap;
I think to understand it has something to do with panel.text() but I can’t
properly set it to work: any help for this?

thanks

max




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