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myfun <- function(x){
  plot(x = 1, y = 1, main = expression(paste(delta, "title ", x)))
}

myfun(3)

I'm using paste to pass in the x variable for my plot title. However, because I also have a mathematical symbol, delta, in the mix, I'm using expression on top of paste. However, this causes the variable x to not appear in the plot title.

Edit:

plot(x = 1, y = 1, main = bquote(paste(delta, "title ", .(x)))) solves the problem!

However, the same approach did not work for boxplot(x = 1, y = 1, main = bquote(paste(delta, "title ", .(x)))).

Improve this question
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  • 1
    Try using bquote and wrap in .( ) like this: plot(x = 1, y = 1, main = bquote(paste(delta, "title ", .(x)))) ... see this answer...or this one... Commented Jun 8, 2020 at 2:44
  • Thank you. I was wondering if there's a similar solution for boxplot instead of plot? I've edited the question. Commented Jun 8, 2020 at 2:50
  • 1
    boxplot(...) (no main), then add title(bquote(...)). Commented Jun 8, 2020 at 3:01
  • 1
    try splitting up the title as suggested here and by @r2evans Commented Jun 8, 2020 at 3:01
  • 1
    or just boxplot(1, 1, main = bquote(expression(paste(delta, " title ", .(x))))) Commented Jun 8, 2020 at 3:01
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