Separate a line with a plus sign (+)

Question

I have a line in a data frame: "(1)+(2)"

I want to separate with the separator "+", so that I get one element like the (1)rest like (2), therefore, keeping the parentheses. I used strsplit, but it does not save the brackets.

Answer 1

Using

strsplit("(1)+(2)", "\\+")

or

strsplit("(1)+(2)", "+", fixed = TRUE)

The idea of ​​using strsplit("(1)+(2)", "+")does not work, because unless otherwise specified, the argument splitis a regular expression, and the character +is special in regex. Other characters who also need special care,

• ?
• *
• .
• ^
• $
• \
• |
• { }
• [ ]
• ( )