R help - Jun 2009 - question about adding plots in a grid (lattice package)

Hello!
I am starting to use the lattice package. I generated an xyplot  
conditioned on a factor that has three levels: hence I get three plots  
in three panels spaces and one is left empty. I would like to add a  
plot to the empty panel space. Is it possible?
Thank you

On 6/16/09, Marion Dumas <mariouka at gmail.com>
wrote:
> Hello!
>  I am starting to use the lattice package. I generated an xyplot
conditioned
> on a factor that has three levels: hence I get three plots in three panels
> spaces and one is left empty. I would like to add a plot to the empty panel
> space. Is it possible?
Yes. The easiest way depends on what you would like to add. If it's
another lattice plot, then use the 'split' or 'position'
arguments in
?print.trellis. More generally, you can set up a grid viewport there
and add whatever you need (for base graphics, you would need the
gridBase package).

-Deepayan