[R] xyplot() with discontinuous x-axis variable

[Rich Shepard]

On Fri, 6 Sep 2013, S Ellison wrote:

> #Test data
> ym <-as.data.frame(expand.grid(Y=c(2004:2006, 2010:2012), A=1:4)) #A is an arbitrary variable to give us some panels.
> ym$x <- runif(nrow(ym))
>
> library(lattice)
>
> #Plots without, andf with, a groups argument
>
> xyplot(x~Y|A, data=ym, type="l")
> xyplot(x~Y|A, data=ym, type="l", groups=ym$Y<2007)
>
> Is that what you had in mind?

   Yes, it is. Thanks very much for the lesson is using groups.

Rich