add quotation mark to a vector in R [duplicate]

Question

This question already has answers here:

Does R have quote-like operators like Perl's qw()? (6 answers)

Closed 5 years ago.

Just wonder if there is any shortcut in R to add the quotation mark to a vector? So it will be like c(lemon, orange, apple) to c("lemon", "orange", "apple") without manually going to each item to change it since sometimes many items can be in a vector. Thanks.

Answer 1

You can try

 as.character(quote(c(lemon, orange, apple)))[-1]

Or another option as suggested by @MrFlick in the comments

 as.character(expression(lemon, orange, apple))

Answer 2

v = c("lemon", "orange", "apple")
v = paste0('"', v, '"')
# use cat in this case to see what's "really" there
# print will show the quotes escaped with backslashes
cat(v)
## "lemon" "orange" "apple"