How to use latex characters in plots?

[patriciagf]

Hi!
I've been using RStudio for a short time and maybe this question is already answered but I'm struggling with it

I need to write latex characters in my plot, i.e. in the labs, for my graphics to look more professional, and i don't know how.

Thanks so much for your help!

[jrkrideau]

Have a look at How can I include Greek letters in my plot labels? | R Code Fragments

[patriciagf]

Thanks!! That's just what i was looking for!

[joels]

The R plotmath expression system can be somewhat cumbersome to use. If you wish, you can directly include Latex in plots using the latex2exp package. For example:

library(latex2exp)
library(tidyverse)

ggplot(mtcars, aes(mpg, hp)) + 
  geom_point() + 
  annotate(geom='text', label=TeX("$\\frac{\\sigma}{\\mu}exp(-\\pi \\phi)$"), 
           y=300, x=22, size=5) +
  theme_bw()
#> Warning in is.na(x): is.na() applied to non-(list or vector) of type
#> 'expression'

^{Created on 2021-05-07 by the reprex package (v1.0.0)}