unique

unique — extract unique components of a vector

Calling sequence

[N, [k]]=unique(M)

`M`	: vector of real numbers or strings
`N`	: vector of real numbers or strings
`k`	: vector of integers

unique(M) returns a vector which retains the unique entries of M in ascending order.

If required the output argument k contains the position of the first encountered unique entries.



M=round(2*rand(20,1));

unique(M)
[N,k]=unique(M)

unique(string(M))
[N,k]=unique(string(M))