yy_to_yyyy: Convert two-digit to four-digit years
Description
yy_to_yyyy()
converts two-digit years to four-digit years.
Usage
yy_to_yyyy(x, cutoff_2000 = 68L)
Arguments
- x
An integer vector of years.
- cutoff_2000
An integer value. Two-digit years smaller or equal to
cutoff_2000
are parsed as though starting with 20
, otherwise parsed as
though starting with 19
.