R plot label with superscript as first character

user_8665021 0
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I am using R plots to plot isotopic data. I want to have an axis label with a superscript as the first character. I have tried to do it the same way as for superscripts on the second caracter but get the following error

x<-seq(0,10) y<-seq(0,10) plot(x, y, ylab=expression(paste(^87,'Sr/',^'86','Sr')))

Error: unexpected '^' in "plot(x, y, ylab=expression(paste(^"

Thanks for your help.

superscript plot r
2 Answers

The trick is to put an empty string at the start: 

ylab=expression(text=''^87*'Sr/'^86*'Sr'))
user_77274290

This command worked for me:

ylab(expression(~''^{"87"}~Sr/~''^{"86"}~Sr))
user_198843530
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