How can I write a simple combination of superscripts and a word in ggplot2 labels?

Question

I would like to write on the x and y axes of the ggplot the following expression: LE flux [W m-1]. My solution is:

xlab(expression("LE flux [W m""~"^{-2}"~]")).

I don't understand why it doesn't work. Appreciate any help!

Answer 1

I think you should do labs(x = expression('blah'))

library(dplyr)
library(ggplot2)

ggplot(mtcars, aes(wt, mpg))+
  geom_point() +
  labs(x = expression('LE flux [W'~ m^-2 ~']'), y = expression('LE flux [W'~ m^-2 ~']'))