Using italic() with a variable in ggplot2 title expression

Question

When I make a map using ggplot2 and attempt to italicize part of the figure title using a combination of expression() and italic() usi

Answer 1

bquote or substitute should work,

 a = 'text' 
 plot(1,1, main=bquote(italic(.(a))))
 plot(1,1, main=substitute(italic(x), list(x=a)))