Displaying 1 result from an estimated 1 matches for "earlydata".
2004 Dec 02
6
dropping rows
Hi!
Sorry for asking a trivial questions, but I can't seem to figure this out.
I have a dataframe called master containing 30-odd variables.
In this dataframe, I have observations across these 30 variables from
1930 to 2003 (I've made a "year" variable). How can I drop all rows for
which the year is less than 1960? I'm assuming something with ifelse()
but I can't