How to generate a boxplot graph with whisker by ggplot

tidyverse
4

Hi there,

If you add stat_boxplot(geom = 'errorbar') you'll get what you want. Compare a (your code) to b (your code augmented with stat_boxplot() ) below:

library(tidyverse)
library(gridExtra)
#> 
#> Attaching package: 'gridExtra'
#> The following object is masked from 'package:dplyr':
#> 
#>     combine

a <- ggplot(data=mpg, mapping=aes(x=class, y=hwy)) + geom_boxplot()
b <- ggplot(data=mpg, mapping=aes(x=class, y=hwy)) + geom_boxplot() + stat_boxplot(geom = 'errorbar')

grid.arrange(a, b, nrow = 2)

Created on 2018-10-04 by the reprex package (v0.2.0).

Hope this helps!

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