Text labels outside ggplot piechart

Question

how do I put a comment outside a ggplot piechart? Ideally in the corner of a window. Any operations including cartesian coordinates somehow ruin the plot. I just need a simple comment about the source of data.

TIA

Answer 1

You can add a labs function to your ggplot and set the caption argument to your desired text. The caption will show up in the lower right by default. For example:

library(ggplot2)

ggplot(mtcars, aes(mpg, cyl))+
  geom_point() +
  labs(caption="Source: My Work")