Use sub-/superscript and special characters in legend texts of R plots

Question

I generate a plot for multiple datasets. Each of the datasets should get it\'s own legend, which might contain greek letters, plotmath symbols or sub and superscrition. I\'d lik

Answer 1

Change "legend_texts" to:

# generate legend texts (in a loop)
legend_texts = c(
  as.expression(bquote(Omega^2))
  , as.expression(bquote(Omega%*%10))
)

From the help page for ?legend, the "legend" argument is described as:

a character or expression vector. of length ≥ 1 to appear in the legend. Other objects will be coerced by as.graphicsAnnot.

Output:

Answer 2

Try this:

 legend_texts = expression(
   Omega^2, Omega*10)

 legend(
   "topleft"
   , legend = legend_texts
   , col = c(1:2)
   , pch = c(1:2)
   , lty = 1
   )

I could not tell if you wanted Omega^10 or Omega*10 or Omega%*%10 , but they all would produce acceptable plotmath expressions.