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Please note that the recommended version of Scilab is 6.0.1. This page might be outdated.
See the recommended documentation of this function

Scilab Help >> Elementary Functions > Set operations > unique

unique

extract unique components of a vector or matrices

Calling Sequence

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

Arguments

M

vector or matrix of numbers or strings

orient

flag with possible values : 1 or "r", 2 or "c"

N

vector or matrix of numbers or strings

k

vector of integers

Description

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.

Examples

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

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

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

A = [0,0,1,1;
     0,1,1,1;
     2,0,1,1;
     0,2,2,2;
     2,0,1,1;
     0,0,1,1];
T='x'+string(A);

//unique rows

[m,k]=unique(A,'r')
unique(T,'r')

//unique columns
[m,k]=unique(T,'c')
unique(A,'c')

See Also

  • members — count (and locate) in an array each element or row or column of another array
  • union — extract union components of a vector
  • intersect — returns the vector of common values of two vectors
  • gsort — sorting by quick sort algorithm
  • lex_sort — lexicographic matrix rows sorting
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Last updated:
Wed Apr 01 10:13:53 CEST 2015