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How to Create a Function in MATLAB: A Complete Guide
MATLAB functions are the backbone of clean, reusable code. Whether you're processing data, running simulations, or automating calculations, knowing how to write a proper function separates scattered scripts from organized, maintainable work. Here's everything you need to understand how MATLAB functions are structured — and what shapes how they behave in practice.
What Is a MATLAB Function?
A function in MATLAB is a block of code that accepts inputs, performs operations, and returns outputs. Unlike a script, which runs in the base workspace and shares variables globally, a function has its own isolated workspace. Variables created inside a function don't bleed into the rest of your environment unless explicitly returned.
This isolation is a feature, not a limitation — it makes functions predictable, testable, and safe to reuse across projects.
The Basic Syntax of a MATLAB Function
Every MATLAB function follows a consistent structure: