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...;,"c") Row2: Costs as functions of x and y, and conditioned on, again the same event factor("a","b","c") I tried the following: windows(); par(mfrow=c(3,1)); levelplot(z ~ x*y|events, probDat); levelplot(z ~ x*y|events, daysDat); levelplot(z ~ x*y|events, costDat); It does not do what I want. It replace the previous plot every time I call a new levelplot. I can't put them into the same matrix and plot them all at once because the scale of each data type is very different, i.e.g probability=c(0,1), days=c(0,10), etc. I'm wondering if you could sugge...