On Sep 15, 2011, at 12:27 PM, bby2...@columbia.edu wrote:
I have two variables, both numerical. I would like to find the
unique values of the pairs, in other words, unique coordinates if I
were to plot them.
I also need to know how many pairs there are, but I guess I can use
length() if I can somehow isolate the unique pairs first?
?duplicated
dfrm[ !duplicated(dfrm), ]
# Would give the unique pairs.
--
David Winsemius, MD
West Hartford, CT
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