Add textbox to facet wrapped layout in ggplot2

Question

I am aware that one is able to annotate a plot created by ggplot2 or even to combine large and small viewports, as is documented in the ggplot2-book. However, it seems that

Answer 1

Since ggplot2 2.2, I've used the caption option instead. You might want to give that a try.

library(tidyverse)

ggplot(data = mtcars, 
            mapping = aes(y=mpg, x=wt)) +
  geom_point() +
  facet_wrap(c("gear", "cyl"), labeller = "label_both") +
  labs(title = "mtcars analysis",
       subtitle = "This is a subtitle \n",
       caption = "\n Note: This analysis compares the number of gears and cylinders", 
       x = "weight", y = "mpg")

And here's what you'd get:

I hope that helps you.