[R] bwplot superpose panel.points from another dataframe

[Peter Ehlers]

On 2010-09-27 4:54, Christophe Bouffioux wrote:
> bwplot(v2 ~ v1 | z, data = ex3, layout=c(3,2),
>         pch = "|",
>         par.settings = list(
>         plot.symbol = list(alpha = 1, col = "transparent",cex = 1,pch = 20)),
>         panel = function(x, y){
>              panel.bwplot(x, y)
>              X<- tapply(ex3$v1b, ex3[,c(1,2)], max)
>              Y<- seq(length(unique(ex3[,c(1,2)])))
>              panel.points(X, Y, pch = 17, col = "red")
>              })
>

Perhaps this is what you're trying to achieve:

  bwplot(v2 ~ v1 | z, data = ex3, layout=c(3,2),
        panel = function(x, y){
             panel.bwplot(x, y, pch="|")
             X <- tapply(ex3$v1b, ex3[, 1:2], max)
             Y <- seq(nrow(unique(ex3[, 1:2])))
             panel.points(X, Y, pch = 17, col = "red")
             })

(I didn't see any need for your par.settings.)

I'm not crazy about the way you define X,Y. I think
I would augment the data frame appropriately instead.

   -Peter Ehlers