MATLAB Theory for User Defined Functions, Script and Function files, Anonymous Functions| Lecture 15

This lecture contains the following topics:
User-Defined Functions in MATLAB
Comparison Between Script files and Function files
Anonymous Functions in MATLAB
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CREATING A FUNCTION FILE
The Editor Window → New → Function
or The Editor Window → New Script
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Comparison Between Script files and Function files
Both script and function files are saved with the extension .m (that is why they are sometimes called M-files).

The first executable line in a function file is (must be) the function definition line.

The variables in a function file are local. The variables in a script file are recognized in the Command Window.

Script files can use variables that have been defined in the workspace.
Script files contain a sequence of MATLAB commands (statements).

Function files can accept data through input arguments and can return data through output arguments.

When a function file is saved, the name of the file should be the same as the name of the function.

A user-defined function is used in the same way as a built-in function. It can be used (called) in the Command Window, in a script file, or in another function.
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Anonymous Functions

An anonymous function is a simple (one-line) user-defined function that is defined without creating a separate function file (m-file).

Simple mathematical expression has to be calculated many times within a program, MATLAB provides the option of using anonymous functions.

Anonymous functions can be constructed in the Command Window, within a script file, or inside a regular user-defined function.

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OTHER LECTURES
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