[R] adding value labels on Interaction Plot

[Dimitri Liakhovitski]

Hello - and sorry for what might look like a simple graphics question.

I am building an interaction plot for d:

d=data.frame(xx=c(3,3,2,2,1,1),yy=c(4,3,4,3,4,3),zz=c(5.1,4.4,3.5,3.3,-1.1,-1.3))
d[[1]]<-as.factor(d[[1]])
d[[2]]<-as.factor(d[[2]])
print(d)

interaction.plot(d$xx, d$yy, d$zz,
  type="b", col=c("red","blue"), legend=F,
  lty=c(1,2), lwd=2, pch=c(18,24),
  xlab="X Label",
  ylab="Y Label",
  main="Chart Label")

I am trying and not succeeding in adding Y values (value labels in
Excel speak) near the data points on 3 lines of the graph.
I understand that I might have to use "text". But how do I tell text
to use the actual coordinates of the dots on the lines?


Thank you very much!

-- 
Dimitri Liakhovitski
MarketTools, Inc.
Dimitri.Liakhovitski at markettools.com