[R] adding value labels on Interaction Plot

[David Winsemius]

See if this helps. After your code, submit this to R:

with(d, text(xx[xx==3],zz[xx==3],paste("3, ",zz[xx==3])))

After that has convinced you that xx and zz are being used properly,   
you can try the more general approach:

with(d, text(xx,zz,paste(xx, " , ", zz)))

I would have used ZZ rather than "Y Label" on the y axis, because yy  
is being used as a grouping parameter and the plotted value is really zz

-- 
David Winsemius

On Mar 4, 2009, at 11:52 AM, Dimitri Liakhovitski wrote:

> 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
>
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