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

[Peter Dalgaard]

"Larsen, Thomas" <thl at dmu.dk> writes:

> 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))

How about expression("atom%"^15*N) ?

 
> Best regards,
> Thomas Larsen
> 
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> 
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