[R] Labeling points with xYplot

[John Poulsen]

Yes, using panel.xYplot is the best thing to do.  I couldn't get it to 
work, which probably means I was specifying it incorrectly.  I would be 
very happy if someone had an example of how to do it.

Thanks again -- John

Frank E Harrell Jr wrote:
> John Poulsen wrote:
>> 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)})
> 
> One of the purposes of xYplot is to use panel.xYplot
> Frank
>