[R] How to write "%" before superscript?

[Uwe Ligges]

Larsen, Thomas wrote:

> I would like to write atom% 15N in the ylab of a plot - "15" should be
> written as superscript. How do I put "%" into the expression? It does
> not work if I type "%" directly after "atom" in the expression below.
> 
> plot(1:10, ylab = expression(atom^15*N))

expression(atom*"%"^15*N)


Uwe Ligges


> 
> Best regards,
> Thomas Larsen
> 
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