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## Removing Rows or Columns from a Matrix

The easiest way to remove a row or column of a matrix is setting that row or column equal to a pair of empty square brackets `[]`. For example, create a 4-by-4 matrix and remove the second row.

`A = magic(4)`
```A = 4×4 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1 ```
`A(2,:) = []`
```A = 3×4 16 2 3 13 9 7 6 12 4 14 15 1 ```

Now remove the third column.

`A(:,3) = []`
```A = 3×3 16 2 13 9 7 12 4 14 1 ```

You can extend this approach to any array. For example, create a random 3-by-3-by-3 array and remove all of the elements in the first matrix of the third dimension.

```B = rand(3,3,3); B(:,:,1) = [];```

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