[R] Is there a function to test if all the elements in a vector are unique

Ista Zahn istazahn at gmail.com
Tue Dec 1 04:47:26 CET 2009

See ?duplicated. But really I don't see anything wrong with your approach.


On Mon, Nov 30, 2009 at 10:42 PM, Peng Yu <pengyu.ut at gmail.com> wrote:
> length(unique(c(1,2,2)))==length(c(1,2,2))
> I use the above test to test if all the elements in a vector are
> unique. But I'm wondering if there is a convenient function to do so
> in R library.
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Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology

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