How to add alpha, beta (Greek symbols) in R plots title

Question

I want to add Greek symbols (e.g., α, β) to the plot title. How to display these symbols in R? Is there any function for it?

Answer 1

You can use the expression() function to include Greek letters in titles and labels of R plots. If you want additional characters along with the Greek letters, you can use the paste() function.

Here is an example to show alpha and beta in the title of a histogram:

> points <- rnorm(100)

> hist(points, breaks = 10, main = expression(paste("display ", alpha/beta)))