# clearfun

Clear an built-in function.

## Syntax

* l = clearfun(function\_name)
* l = clearfun(function\_handle)

## Input argument

* function\_name - a string: function name.
* function\_handle - a function handle.

## Output argument

* l - a logical

## Description

**clearfun** clears built-in.

## Example

```matlab
cos(3)
a = clearfun('cos')
cos(3)

sin(3)
b = clearfun(str2func('sin'))
sin(3)
```

## See also

[feval](feval).

## History

| Version | Description     |
| ------- | --------------- |
| 1.0.0   | initial version |

## Author

Allan CORNET
