MATLAB Function Reference |

MATLAB data type that is a handle to a function

**Syntax**

handle = @function

**Description**

```
@function
```

returns a handle to the specified MATLAB function.

A function handle is a MATLAB data type that captures all the information about a function that MATLAB needs to execute, or *evaluate*, it. A function handle is typically passed in an argument list to other functions. These other functions then use the handle as a means to call the function for whom the handle was constructed.

Because many MATLAB functions are overloaded, a function handle often maps to a number of code sources (e.g., built-in code, M-files), that implement the function. A function handle stores the context of all of these overloaded sources, or *methods*, if they are on the MATLAB path at the time the handle is created.

You evaluate a function handle using the MATLAB `feval`

command. If you pass a function handle as an argument into another function, then the receiving function must use `feval`

to evaluate the function. When you evaluate an overloaded function handle, MATLAB selects and executes one of the overloaded methods whose context is stored in the handle.

As a standard MATLAB data type, a function handle can be manipulated and operated on in the same manner as other MATLAB data types.

Function handles enable you to:

- Pass a function reference to another function within the handle
- Reduce the number of files that define your functions
- Improve performance in repeated operations
- Ensure reliability when evaluating functions

**Examples**

The following example creates a function handle for the `humps`

function and assigns it to the variable, `fhandle`

.

fhandle = @humps;

Pass the handle to another function in the same way you would pass any argument. This example passes the function handle just created to `fminbnd`

, which then minimizes over the interval [0.3, 1].

x = fminbnd (@humps, 0.3, 1) x = 0.6370

**See Also**

`str2func`

, `func2str`

, ```
functions
```

function | functions |