Displaying a greater than or equal sign

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An alternative to using expressions is Unicode characters, in this case Unicode Character ‘GREATER-THAN OR EQUAL TO’ (U+2265). Copying @mnel’s example

.d <- data.frame(a = letters[1:6], y = 1:6)

ggplot(.d, aes(x=a,y=y)) + geom_point() + 
    scale_x_discrete(labels = c(letters[1:5], "\u2265 80"))

Unicode is a good alternative if you have trouble remembering the complicated expression syntax or if you need linebreaks, which expressions don’t allow. As a downside, whether specific Unicode characters work at all depends on your graphics device and font of choice.

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