[R] expression in lattice

[Martin Henry H. Stevens]

After checking the usual archives (Baron search engine) I came up nothing.
It appears that ylab=expression() doesn't work in lattice? How do I put 
superscripts in ylab?
Many Thanks,
Hank

Martin Henry H. Stevens, Assistant Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056

Office: (513) 529-4206
Lab: (513) 529-4262
FAX: (513) 529-4243
http://www.muohio.edu/~botcwis/bot/henry.html

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