Variable width bars in ggplot2 barplot in R

Question

I'm trying to produce a barplot with bar widths determined by an integer variable (sample size). Adding "width = variableName" doesn't seem to work. Is there an established way of doing this? Here's some dummy data and code. I want the bar widths to be a function of variable d in this example.

dat <- data.frame(a=c("A", "B", "C"), b=c(0.71, 0.94, 0.85), d=c(32, 99, 18))

ggplot(dat, aes(x=a, y=b, fill=a)) +  
geom_bar(colour="black", size=.3) + 
theme_bw()

chl · Accepted Answer · 2011-05-10 11:01:31Z

43

How about using width= after rescaling your d vector, say by a constant amount?

ggplot(dat, aes(x=a, y=b, width=d/100)) + 
  geom_bar(aes(fill=a), stat="identity", position="identity")

enter image description here

answered May 10, 2011 at 11:01

chl

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4 Comments

Steve Over a year ago

@chi: that's great, thanks a lot. I'd already tried this approach, but without the 'stat' and 'position' arguments it didn't affect the bar widths.

fstevens Over a year ago

Is it possible to add the width of the bars in the legend ?

Felipe Gerard Over a year ago

THANK YOU! I was missing the position argument :)

Skyler Over a year ago

how would you apply this to percent charts such the answer for stackoverflow.com/questions/46984296/…

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