On 8/19/09, Thorn Thaler wrote:
> Hi everybody,
>
> I want to add a single contourline to a levelplot. While everything works
> fine if the value at which the line should be drawn is positive, there is an
> error if the value is negative:
>
> library(lattice)
> my.panel <- function(..., at, con
Hi everybody,
I want to add a single contourline to a levelplot. While everything
works fine if the value at which the line should be drawn is positive,
there is an error if the value is negative:
library(lattice)
my.panel <- function(..., at, contour=FALSE, labels=NULL) {
panel.levelplot(
