How do I get two levels of grouping for in a lattice panel function?
To paraphrase your sig: "Rhelp answers are like a trumpet - if you don't put any code and data into them, you don't get anything out of it."
-- "Life is like a trumpet - if you don't put anything into it, you don't get anything out of it." <
David Winsemius, MD West Hartford, CT
Yes, and furthermore: 1. See http://addictedtor.free.fr/graphiques/ for many examples and code therefor, which is likely to get you very close to what you want. 2. You do not seem to have made much of an effort to learn what you need to know on your own, as it appears that this is basic lattice functionality. Aside from the man page, look for lattice tutorials online (perhaps starting on CRAN) or get the book by Deepayan Sarkar, lattice's author, which is comprehensive and full of examples. -- Bert
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