unique

  • unique(X) returns X values in ascending order and without duplicates
  • [Y, ix, iy] = unique(X) with ix and iy satisfying Y = X(ix) and X = Y(iy)
  • unique(X, 'stable') returns X values in the same order as X and without duplicates

Examples

> X = [5 2 3 2 2 4]'#

	5
	2
	3
	2
	2
	4

> [Y, ix, iy] = unique(X)

> Y#

	2
	3
	4
	5
			
> ix#

	2
	3
	6
	1

> iy#

	4
	1
	2
	1
	1
	3	

>> unique(X, 'stable')#

	5
	2
	3
	4	

> t = table([2;1;2], [9.1;8;9.1], 'Rownames', {'Marie'; 'John'; 'Lewis'}, 'Variablenames', {'ID','Score'})

> unique(t)#
                ID            Score
    John         1                8
    Marie        2              9.1

Resources

See also

sort | sortrows