Unicode superscript character

Question

I have an R plot with the axis of the squared squared squares.

I can create the correct Angstrom character using Unicode, for example:

plot.new() text(x=0.5, y=0.8, labels="Interface area (\uc5)") 

Both of my attempts to add a superscript result in errors:

 plot.new() text(x=0.5, y=0.6, labels=expression("Interface area ("*\uc5^2*")")) # Error: unexpected input in "text(x=0.5, y=0.6, labels=expression("Interface area ("*\" plot.new() text(x=0.5, y=0.5, labels=expression("Interface area (\uc5"*^2*")")) # Error: unexpected '^' in "text(x=0.5, y=0.5, labels=expression("Interface area (\uc5"*^" 

I am currently using a typographically incorrect hack:

 plot.new() text(x=0.5, y=0.7, labels=expression("Interface area ("*ring(A)^2*")")) 

(Note that the ring over A is too large)

Can I correct my expression () syntax to use unicode backslash and superscript characters?

Note. I looked at this question , but it concerns the direct use of the Unicode character, not the representation of the backslash.

Answer 1

I think the cleanest way:

 plot.new() text(0.5, 0.7, labels = quote("Interface area " * (Å ^ 2)))