levelplot add line

R folks,

I can't seem to find the instructions in the help files for the lattice 
package that explain how to add lines, such as with lines() or ?, to a 
levelplot.  I'd be grateful if someone could point me in the proper direction.

Cheers,

Jeff

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Jeff Jorgensen

Center for Limnology                             jcjorgensen at wisc.edu
University of Wisconsin Madison           ph (608) 263-2304
680 North Park Street                           fx (608) 265-2340
Madison, Wisconsin 53706                http://limnology.wisc.edu

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