[R] levelplot and unequal cell sizes

[Waichler, Scott R]

I am using levelplot() from lattice with grids that have unequal cell
sizes.  This means that the boundary between two cells is not always
half-way between nodes, as levelplot() assumes.  The result is that some
cell sizes are rendered incorrectly, which can be painfully obvious if
using relatively large cells.  Is there any work-around?  I am using the
conditioning capability of lattice and therefore image() would not be a
good way to go.

Thanks, 
Scott Waichler
Pacific Northwest National Laboratory
scott.waichler _at_ pnl.gov