[R] Lattice: reasons for not passing subscripted "col", "pch", "lty", "fill" to panel functions

From: Vitalie Spinu <vitosmail_at_rambler.ru>
Date: Thu, 03 Jul 2008 12:45:49 +0200

Dear UseRs!

I am really amazed by lattice capabilities but one thing is really beyond my understanding.
I would like to have conditional plots with points inside each panel colored by groups "gr1" and "pched" by "gr2":

xyplot(A~B|C,myD,col=gr1,pch=gr2) #this makes sense for me

But this does not work, because "col","pch","lty","fill" etc. are passed directly to panel function and not subscripted by conditional variable C. The result is that the same truncated vectors col,pch,lty are used for all panels.

I know I can write something like this to overcome the problem:



but is so clumsy :(.

Isn't it possible to have panel.XUZ(x,y,...,col=col[subscritps],...) or something like that? And dispense whith "groups" variable whatsoever?

Sorry if I missed something.

Many thanks,

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