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2010 Aug 13
2
Lattice xyplots plots with multiple lines per cell
Hello,
I need to plot the means of some outcome for two groups (control vs
intervention) over time (discrete) on the same plot, for various subsets
such as gender and grade level. What I have been doing is creating all
possible subsets first, using the aggregate function to create the means
over time, then plotting the means over time (as a simple line plot with
both control & intervention