setdiff

Returns the subset of the first set that does not belong to the second set.

Syntax

setdiff(a,b)

setdiff(a,b,'sorted')

setdiff(a,b,'stable')

setdiff(a,b,'rows')

[c,ia] = setdiff(...)

a,b: The sets whose difference is to be formed.; Type: double | integer | char | string | logical | struct | cell; Dimension: scalar | string | vector | matrix
'sorted' (Default): Returns elements of the difference set in ascending order.; Type: string
'stable': Returns elements of the difference set in their original order.; Type: string
'rows': Returns the difference set of rows as opposed to the elements.; Type: double | integer | char | string | logical | struct | cell; Dimension: scalar | string | vector | matrix

Single return case:

setdiff([1,5,2;6,2,6],[9;0;1;2])

ans = [Matrix] 2 x 1
5
6

Multi-return case:

[c,ia]=setdiff([1,5,2;6,2,6],[9;0;1;2])

c = [Matrix] 2 x 1
5
6
ia = [Matrix] 2 x 1
3
6

Single return case: with 'rows' option:

setdiff([1,5,2;6,2,6],[1 2 6],'rows')

ans = [Matrix] 2 x 3
1  5  2
6  2  6

When repeated elements occur in an input, the last index will be used.