MATLAB提供各种函数集合运算，如集，交集和测试组成员等。
下表显示了一些常用的设置操作：
| 函数 | 描述 |
|---|---|
| intersect(A,B) | Set intersection of two arrays; returns the values common to both A and B. The values returned are in sorted order. |
| intersect(A,B,'rows') | Treats each row of A and each row of B as single entities and returns the rows common to both A and B. The rows of the returned matrix are in sorted order. |
| ismember(A,B) | Returns an array the same size as A, containing 1 (true) where the elements of A are found in B. Elsewhere, it returns 0 (false). |
| ismember(A,B,'rows') | Treats each row of A and each row of B as single entities and returns a vector containing 1 (true) where the rows of matrix A are also rows of B. Elsewhere, it returns 0 (false). |
| issorted(A) | Returns logical 1 (true) if the elements of A are in sorted order, and logical 0 (false) otherwise. Input A can be a vector or an N-by-1 or 1-by-N cell array of strings. A is considered to be sorted if A and the output of sort(A) are equal. |
| issorted(A, 'rows') | Returns logical 1 (true) if the rows of two-dimensional matrix A are in sorted order, and logical 0 (false) otherwise. Matrix A is considered to be sorted if A and the output of sortrows(A) are equal. |
| setdiff(A,B) | Set difference of two arrays; returns the values in A that are not in B. The values in the returned array are in sorted order. |
| setdiff(A,B,'rows') |
Treats each row of A and each row of B as single entities and returns the rows from A that are not in B. The rows of the returned matrix are in sorted order.
The 'rows' option does not support cell arrays. |
| setxor | Set exclusive OR of two arrays |
| union | Set union of two arrays |
| unique | Unique values in array |
创建一个脚本文件，并键入下面的代码：
a = [7 23 14 15 9 12 8 24 35]
b = [ 2 5 7 8 14 16 25 35 27]
u = union(a, b)
i = intersect(a, b)
s = setdiff(a, b)
当您运行该文件，它会产生以下结果：
a =
7 23 14 15 9 12 8 24 35
b =
2 5 7 8 14 16 25 35 27
u =
Columns 1 through 11
2 5 7 8 9 12 14 15 16 23 24
Columns 12 through 14
25 27 35
i =
7 8 14 35
s =
9 12 15 23 24 