flipud (MATLAB Functions)

MATLAB Function Reference

flipud

Flip matrices up-down

Syntax

```
B = flipud(A)
```

Description

B = flipud(A) returns A with rows flipped in the up-down direction, that is, about a horizontal axis.

If A is a column vector, then flipud(A) returns a vector of the same length with the order of its elements reversed. If A is a row vector, then flipud(A) simply returns A.

Examples

If A is the 3-by-2 matrix,

```
A =
    1    4
    2    5
    3    6
```

then flipud(A) produces

```
    3    6
    2    5
    1    4
```

If A is a column vector,

```
A =
    3
    5
    7
```

then flipud(A) produces

```
A =
    7
    5
    3
```

Limitations

The array being operated on cannot have more than two dimensions. This limitation exists because the axis upon which to flip a multidimensional array would be undefined.

See Also

flipdim, fliplr, rot90

fliplr floor