[R] lattice background color

[Bliese, Paul D MAJ WRAIR-Wash DC]

I'm sure there is a simple answer to this question, but it stumps me so far.

I've been using R to create graphic images and paste them into other
programs (Word, PowerPoint). 

Recently, I've been using lattice (wonderful package), but I can't figure
out how to create graphs in lattice that don't have a background color --
that is, my graphs carry over the grey background if I use the default.  I
can change the background color to white, and as long as I paste the picture
into a white document everything is fine, but that only works for white
documents.

Any ideas on how to get a NULL background color.  Note that the non-lattice
graphics do not carry over the background color.  The following simple
solution does NOT work:

> trellis.device(bg=NULL)


Using Windows 2000, and R 1.5.0. with the default lattice package.

Paul
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