[R] barplots of several variables with different number of categories

[jon waterhouse]

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 solution?

Thanks,

Jon

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