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Hello all,
I'm sure this is simple, but is has me stumped this morning...
I have a dataframe with 10K+ repeating names (character) each with an unique associated ID number. I need to simply extract a list of unique instances of these pairs. I can easily grab the unique vector of either one, but cannot think of how to get the other (conditional on uniqueness of the first).
Hope that is clear enough.
Thanks!
Michael W. Slattery
Geologist, Ohio EPA
50 West Town Street, Suite 700
Columbus OH, 43215
michael.slattery@epa.state.oh.us
614-728-1221 (Ph)
614-644-2909 (Fax) |