R help - Jun 2008 - Panel-specific colours in barchart, lattice package --- thanks.

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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