CODEWITHSUNDEEP
runicode
Lenna
Lenna

Reputation: 1465

Unicode character with superscript

I have an R plot with an axis of dimension squared Angstroms.

I can create the correct Angstrom symbol with Unicode like so:

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

Label with correct Angstrom symbol

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"*^"

Currently I am using a typographically incorrect hack:

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

Label with incorrect ring(A) symbol

(Note that the ring over the A is too large)

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

Note: I've looked at this question but it concerns direct use of the unicode character rather than the backslash representation.

Upvotes: 2

Views: 1616

Answers (1)

hadley
hadley

Reputation: 103938

I think the cleanest way is probably:

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

Upvotes: 2

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