On 12/06/2008, at 4:08 PM, Martin Morgan wrote:
I think this works -- 'custom' variables get sent to the panel
function, where they're picked up and used for making garish plots.
barchart(y ~ x | f, data=X,
mycolors=rainbow(length(levels(X$f))),
panel=function(..., mycolors) {
col <- mycolors[panel.number()]
panel.barchart(..., col=col)
})
Yew bewdy!!! Works like a charm. Thanks very much.
(I had ***tried*** using panel.number() --- but didn't
get the syntax right, got error messages, and gave up.
Oh me of little faith!)
Thanks also to Gabor Grothendieck who came up with a slightly
less elaborate version of Martin's idea.
cheers,
Rolf
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