[R] coplot question

[derek@nemac]

In R I have 3 variables x,y and z that contain:

|     x  y   z
[1,]  1  12  122
[2,]  1  13  113
[3,]  1  11  111
[4,]  3  13  123
[5,]  4  14  134
[6,]  5  15  155|

I am creating a coplot with the following syntax:

|given.depth<-  co.intervals(z,  number=3,  overlap=.1)
coplot(x~y|z,pch=19,col="red",cex=1.5,given.values=given.depth)|

The resulting plot however has has bars in the conditional variable that 
don't cover all of the values of x and y at x=4, 7=14, and z=134

Thanks,
Derek

-------------- next part --------------
A non-text attachment was scrubbed...
Name: Rplot.png
Type: image/png
Size: 6470 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20130206/cb3241bc/attachment.png>