[R] Can this be done in ggplot?

[Axel Urbiz]

Hi,

I need to bars to display in order based on the values of "v" within each
group "g". Is this possible?

library(ggplot2)
set.seed(1)
df <- expand.grid(g = 1:4, f = factor(c("a", "b", "c")))
df <- df[-1, ] # some factors are not present in certain groups
df$v <- runif(nrow(df))

ggplot(df, aes(x = g, y = v, fill = f)) +
  geom_bar(position="dodge", stat = "identity")

Thanks,
Axel.

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