Karin Lagesen <[EMAIL PROTECTED]> wrote in
news:[EMAIL PROTECTED]:
> 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$Species)))))
>
> Now, in the example on the webpage this comes out with a nice gray
> background that makes things easier to see. Mine comes out with a
> white, potentially transparent background and also the point colors
> have changed.
>
> How do I get the nice gray color back?
I think the grey obscures the plot, but with some searching of the help
files, displaying the rather extensive list from
trellis.par.get(name = NULL) ... and then finding "Graphical
Parameters for Trellis Displays", this seems to do what's desired, ...
background <- trellis.par.get("background")
background$col <- "grey"
trellis.par.set("background", background)
> 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$Species))
+ )))
(I initially tried ...
trellis.par.set(background$col, "grey") #fails)
--
David Winsemius
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