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(...)
Inputs
- a,b
- The sets whose difference is to be formed.
- 'sorted' (Default)
- Returns elements of the difference set in ascending order.
- 'stable'
- Returns elements of the difference set in their original order.
- 'rows'
- Returns the difference set of rows as opposed to the elements.
Outputs
- c
- The subset of a not belonging to b.
- ia
- The index vector such that a(ia) = c.
Examples
setdiff([1,5,2;6,2,6],[9;0;1;2])
ans = [Matrix] 2 x 1
5
6
[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
setdiff([1,5,2;6,2,6],[1 2 6],'rows')
ans = [Matrix] 2 x 3
1 5 2
6 2 6
Comments
When repeated elements occur in an input, the last index will be used.