Programming

Calling Functions

This section describes the following topics on how to make function calls:

• What Happens When You Call a Function
• Determining Which Function Is Called
• MATLAB Calling Syntax
• Passing Certain Argument Types
• Passing Arguments in Structures or Cell Arrays
• Calling External Functions
• Running External Programs

What Happens When You Call a Function

When you call a function M-file from either the command line or from within another M-file, MATLAB parses the function into pseudocode and stores it in memory. This prevents MATLAB from having to reparse a function each time you call it during a session. The pseudocode remains in memory until you clear it using the clear function, or until you quit MATLAB.

Clearing Functions from Memory

You can use clear in any of the following ways to remove functions from the MATLAB workspace.

Syntax	Description
clear functionname	Remove specified function from workspace.
clear functions	Remove all compiled M-functions.
clear all	Remove all variables and functions.

Additional Information on Function Handles

Determining Which Function Is Called

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