[R] dropping rows
t.muhlhofer at lse.ac.uk
Thu Dec 2 01:31:03 CET 2004
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 quite figure it out.
I would appreciate a suggestion of some syntax.
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