[R] variable pattern

Jan Seidel jan_seidel at gmx.de
Mon Feb 5 19:11:58 CET 2001

Suppose I've got p vectors x1, ..., xp each of length n merged in a (n x
p)-matrix X. 
Now I want to calculate the number of distinct values of row-vectors
(x_i1, ..., x_ip).
Is there a way to do this in R? Thanks in advance,

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