I have one column for 'year' and one column for 'day' (julian day) and I want to use these columns to make a 'date' (2002-12-03 or any format is okay). I've found a lot of lubridate
literature on breaking up dates, but am looking for how to put them together.
As simple as it sounds:
year day
2008 1
2008 2
2008 3
2008 4
to
year day date
2008 1 2008-1-1
etc.