utf8 code

 http://www.ltg.ed.ac.uk/~richard/utf-8.cgi

Choose Character, enter the characters to convert in the text box;

Example •, will give you:

Character	•
Character name	BULLET
Hex code point	2022
Decimal code point	8226
Hex UTF-8 bytes	E2 80 A2
Octal UTF-8 bytes	342 200 242
UTF-8 bytes as Latin-1 characters bytes	â <80> ¢

Then:

x <- "\u2022"

print(x)

[1] "•"