[R] cloud plot has white(transparent?) background

[Karin Lagesen]

I am using the code example from the R graph gallery to look at a
cloud plot:

require(lattice) 
data(iris) 
print(cloud(Sepal.Length ~ Petal.Length * Petal.Width, data = iris, 
            groups = Species, screen = list(z = 20, x = -70), 
            perspective = FALSE,
            key = list(title = "Iris Data", x = .15, y=.85, corner = c(0,1), 
            border = TRUE,
            points = Rows(trellis.par.get("superpose.symbol"), 1:3), 
            text = list(levels(iris$Species))))) 

Now, in the example on the webpage this comes out with a nice gray
background that makes things easier to see. Mine comes out with a
white, potentially transparent background and also the point colors
have changed.

How do I get the nice gray color back?

Thanks!

Karin
-- 
Karin Lagesen, PhD student
karin.lagesen at medisin.uio.no
http://folk.uio.no/karinlag