Hello,
	    I have a shingle A and B. A has 5 levels and B has 4 levels.  
Also, I have 8
levels of a factor C.  I wish to xyplot( x ~ y | C *A *B,data=data),

I think this is how the lattice conditioning works:
If i'm not mistaken, all possible combinations of C,A,B
, a subset of the data is accordingly taken and x~y is plotted.   
However, I
have empty sets for some levels and these are plotted as empty panels.
(e.g for A=1, there are only 2 levels of B).

(I saw the solution A:B on the mailing list, which does not work in my
case, since I'd like the multi-level strip titles.)

Is there a way to solve this? Also, each level of C appears in exactly  
one
combination of A and B (the combinations that appear in the data set,
not the ones produced by lattice)

Kind regards Saptarshi


Saptarshi Guha | saptarshi.guha@gmail.com | http://www.stat.purdue.edu/~sguha



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