How to add a horizontal bar

[kongdd]

Dear @clauswilke

Could you give some guidance how to add a horizontal bar in a variable, just like \bar(x) in latex?
Thanks very much!

Dongdong

[clauswilke]

I don't think that possible currently, unfortunately.

[teunbrand]

You can add the unicode overline \u0305 after the character that needs it.

library(ggplot2)
library(ggtext)

ggplot() +
  annotate(
    "richtext",
    x = 1, y = 1, label = "Fooba\u0305r",
    size = 10
  )

^{Created on 2023-04-21 with reprex v2.0.2}