Pie charts in ggplot2 with variable pie sizes

Question

I\'ve tried various ways to get a facet_grid of pie charts in ggplot2 to vary width/radii according to another variable (strength).

geom_bar accepts wid

Answer 1

Do you mean like this?

ggplot(mydata, aes(x=strength/2, y = val, fill = widget, width = strength)) +
  geom_bar(position="fill", stat="identity") + 
  facet_grid(side1 ~ side2) + 
  coord_polar("y") + 
  opts(axis.text.x = theme_blank())