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rggplot2unicode

Save unicode characters to .pdf in R

I would like to save specific unicode characters to a pdf file with ggsave.

Example code

library(ggplot2)

ggplot() +
  geom_point(data = data.frame(x=1, y=1), aes(x,y), shape = "\u2191") +
  geom_point(data = data.frame(x=2, y=2), aes(x,y), shape = "\u2020")

ggsave("test.pdf", plot = last_plot()), width = 40, height = 40, units = "mm")

However, when saving the .pdf the unicode characters are transformed to three dots...

Attempts to fix it

  1. I tried to use the cairo_pdf device in ggsave -> didn't work.
  2. Used this post to plot the unicode characters, but didn't quite understand it...

Question

How do I use both unicode characters in a pdf?

> sessionInfo()
R version 3.6.2
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Catalina 10.15.5
Solution

  • This seems to work on my mac:

    library(tidyverse)

quartz(type = 'pdf', file = 'test.pdf')

ggplot() +
    geom_point(data = data.frame(x=1, y=1), aes(x,y), shape = "\u2191") +
    geom_point(data = data.frame(x=2, y=2), aes(x,y), shape = "\u2020")

    Using the suggestion from here: https://stackoverflow.com/a/44548861/1827