Jon,
You could create new variables with the combined levels just for the
purpose of plotting.
Assume I have data.frame bpt
str(bpt)
'data.frame': 12 obs. of 2 variables:
$ V1: Factor w/ 3 levels "low","med","high": 1 1 1 1 2 2 2 2 3 3 ...
$ V2: Factor w/ 6 levels "1","2","3","4",..: 1 1 2 2 3
If I have two factors, v1 and v2 and I want to have a stacked bar graph of
the two variables side by side I could do
barplot(cbind(table(v1),table(v2)))
if v1 and v2 have the same number of categories.
If they don't have the same number of categories this won't work.
I'm sure there's a simple s
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