valid_reg: Match all valid car registration plates
In tjtnew/usefulR: Useful R functions

Description Usage Arguments Details Value

Matches plates of the following format and returns their positional index - dateable plates (1963 onwards) - 2 letters, 2 numbers, 3 letters - 1 letter, 1 to 3 numbers, 3 letters - 3 letters, 1 to 3 numbers, 1 letter

1	valid_reg(x)

`x`	character vector of registrations

- dateless plates (pre 1963) - 1 to 4 numbers, 1 to 2 letters - 1 to 3 numbers, 1 to 3 letters - 1 to 2 letters, 1 to 4 numbers - 1 to 3 letters, 1 to 3 numbers

indices of x that match a valid registration pattern

tjtnew/usefulR documentation built on May 11, 2019, 8:28 p.m.