[R] Labeling points with xYplot

[John Poulsen]

Hello R-Users,

I am trying to label points on an xYplot.  I can label the points, but 
then I lose the error bars.  I suspect that I should be using 
panel.xYplot rather than panel.xyplot, but that didn't work either...

Can anybody help me out?  Example code is below.  First xYplot has error 
bars, second tries to label the points and the bars disappear.

Thanks,
John


a=c(1:4)
b=rnorm(4,15,5)
blab=b+1

xYplot(Cbind(b, b-1.5, b+1.5)~a,
        ylim=c(0,max(b)+3))

xYplot(Cbind(b, b-1.5, b+1.5)~a, ylim=c(0,max(b)+3),
        panel=function(x,y,...){
          panel.xyplot(x,y,...)
          ltext(x=list(1,2,3,4),
                y=list(13,14,15,16),
                labels=list("A","B","C","D"), pos=2)})