unique — extract unique components of a vector or matrices
[N [,k]]=unique(M) [N [,k]]=unique(M ,orient)
vector or matrix of numbers or strings
flag with possible values : 1 or "r", 2 or "c"
vector or matrix of numbers or strings
vector of integers
unique(M)
returns a vector which retains the unique entries of M
in ascending order.
unique(M,"r")
or unique(M,1)
returns the unique rows of M
in lexicographic ascending order.
unique(M,"c")
or unique(M,2)
returns the unique columns of M
in lexicographic ascending order.
If required the output argument k
contains the position of the
first encountered unique entries.