How to overlay two geom_bar?

Question

I\'m trying to overlay 2 the bars from geom_bar derived from 2 separate data.frames.

dEQ
   lab perc
1  lmP 55.9
2  lmN 21.8
3   Nt  0.6
4 expG          


        

Answer 1

here is an example:

p <- ggplot(NULL, aes(lab, perc)) + 
  geom_bar(aes(fill = "dEQ"), data = dEQ, alpha = 0.5) +
  geom_bar(aes(fill = "LMD"), data = LMD, alpha = 0.5)
p

but I recommend to rbind them and plot it by dodging:

dEQ$name <- "dEQ"
LMD$name <- "LMD"
d <- rbind(dEQ, LMD)
p <- ggplot(d, aes(lab, perc, fill = name)) + geom_bar(position = "dodge")