I would appreciate help with constructing regex pattern. I have a character vector such as
vector <- c("r01052", "r0105a2", "r01052a", "r0105a2a")
I would like to create two columns. First, with first 5 characters and if there is a letter after the fifth character => with first 6 characters. Hence, in this case, I would get:
first_column <- c("r0105", "r0105a", "r0105", "r0105a")
Second, with last character and if there is a letter as a last character => with two last characters. Again, in this case, I would get:
second_column <- c("2", "2", "2a", "2a")
Could you help me with constructing regex patterns for str_substract? Note that the provided vector is just an example and individual letters and individual numbers change, the only thing which is constant is the pattern of letters and numbers.