MATLAB Function Reference |

Return time elapsed between date vectors

**Syntax**

**Description**

```
e = etime(t2, t1)
```

returns the time in seconds between vectors `t1`

and `t2`

. The two vectors must be six elements long, in the format returned by `clock`

:

**Examples**

Calculate how long a 2048-point real FFT takes.

**Limitations**

As currently implemented, the `etime`

function fails across month and year boundaries. Since `etime`

is an M-file, you can modify the code to work across these boundaries if needed.

**See Also**

errordlg | etree |

© 1994-2005 The MathWorks, Inc.