Special characters and superscripts on plot axis titles

Question

I am trying to make a y-axis title with both a special character and a superscript. I am able to do this, but I want the closing parentheses not to be superscripted. And t

Answer 1

This solves the problem of the super-scripted closing parenthesis:

# reproducible data
plates <- data.frame(WatexCl = rnorm(100), ConcuM = rnorm(100), Depth = rnorm(100))

# alter the default plot margins so the 
# superscript in the y-axis label is completely displayed
par(mar=c(5,5,4,2))

# draw the plot
plot(WatexCl ~ ConcuM, data = plates,
     col = as.numeric(1), 
     pch = as.numeric(Depth), 
     xlab = bquote("Concentration Cl ("*mu~"moles/g dry wt)"), 
     ylab = bquote("Average Conc of S- on plates ("~mu~"Moles/cm"^"2"*")"))