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Function creates side-by-side boxplots for each factor, a design plot (means), and an interaction plot.
twoway.plots(Y, fac1, fac2, COL = c("#A9E2FF", "#0080FF"))
response variable
factor one
factor two
a vector with two colors
oneway.plots, checking.plots
oneway.plots
checking.plots
# NOT RUN { with(data = TireWear, twoway.plots(Wear, Treat, Block)) # }
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