about x- or y-axis

[lily li]

Hi ggplot2 users,

How to have superscript in x- or y-axis? For example, R2 in the x-axis. I tried various ways, but it didn't work. Thanks for your help.

+xlab(expression(paste('R^{2}')))

[Ben Bolker]

dd <- data.frame(x=1:4,y=1:4)
ggplot(dd,aes(x,y))+geom_point()+labs(x=expression(R^2))

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