Function Handles - MATLAB & Simulink (original) (raw)

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Variables that allow you to invoke a function indirectly

A function handle is a MATLAB® data type that represents a function. A typical use of function handles is to pass a function to another function. For example, you can use function handles as input arguments to functions that evaluate mathematical expressions over a range of values.

Function handles can represent either named or anonymous functions. To create a function handle, use the @ operator. For example, create a handle to an anonymous function that evaluates the expression _x_2 –_y_2:

f = @(x,y) (x.^2 - y.^2);

For more information, see Create Function Handle.

Functions

Topics

• Create Function Handle
  Use a function handle to create an association to a named function or an anonymous function. Then, you can indirectly call the representative function.
• Pass Function to Another Function
  You can use function handles as input arguments to functions that evaluate mathematical expressions over a range of values, such as integral and fzero.
• Parameterizing Functions
  This topic explains how to store or access extra parameters for mathematical functions that you pass to functions such as fzero, ode45, or integral.
• Call Local Functions Using Function Handles
  If a function returns handles to local functions, you can call the local functions outside of the main function. This approach allows you to have multiple, callable functions in a single file.
• Compare Function Handles
  The result of comparing equality of function handles depends on what the handle represents and when you created it.