[R] how to get unique vectors

Jason Liao jg_liao at yahoo.com
Wed Dec 19 22:53:31 CET 2001

First, happy holidays, everyone! Thanks to the R team for bringing out
1.4 before the new year.

I have 10000 integer triplets stored in A[1:10000, 1:3]. I would like
to find the unique triplets among the 10000 ones with possible
duplications. What is the easiest way for this. I know the function
unique(), which apply to a vector, not the 10000*3 array in my problem.

Thanks in advance.


Jason G. Liao, Ph.D.
Division of Biometrics
UMDNJ School of Public Health
335 George Street, Suite 2200
New Brunswick, NJ 08903-2688
phone (732) 235-9748, fax (732) 235-9777


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