intersect

Returns the elements that are common to two sets, without duplication.

Syntax

intersect(a,b)

intersect(a,b,'sorted')

intersect(a,b,'stable')

intersect(a,b,'rows')

[c,ia,ib] = intersect(a,b)

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

c: The intersection of a and b.
ia, ib: a(ia) and b(ib) are indiex vectors such that a(ia) = c and b(ib) = c.

Single return case:

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

ans = [Matrix] 2 x 1
1
2

Multi-return case:

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

c = [Matrix] 2 x 1
1
2
ia = [Matrix] 2 x 1
1
5
ib = [Matrix] 2 x 1
3
4

Multi-return case with rows option:

intersect([1,5,2;6,2,6],[9,0,1;6,2,6],'rows')

ans = [Matrix] 1 x 3
6  2  6

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