MATLAB Function Reference |

Find set intersection of two vectors

**Syntax**

**Description**

```
c = intersect(A, B)
```

returns the values common to both A and B. The resulting vector is sorted in ascending order. In set theoretic terms, this is `A`

B. A and B can be cell arrays of strings.

```
c = intersect(A, B, 'rows')
```

when `A`

and `B`

are matrices with the same number of columns returns the rows common to both `A`

and `B`

.

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

also returns column index vectors `ia`

and `ib`

such that `c = a(ia)`

and `c = b(ib)`

(or `c = a(ia,:)`

and` c = b(ib,:)`

).

**Examples**

A = [1 2 3 6]; B = [1 2 3 4 6 10 20]; [c, ia, ib] = intersect(A, B); disp([c; ia; ib]) 1 2 3 6 1 2 3 4 1 2 3 5

**See Also **

`ismember`

, `issorted`

, `setdiff`

, `setxor`

, `union`

, `unique`

interpstreamspeed | intmax |

© 1994-2005 The MathWorks, Inc.