Data Definition Basics

How to define data, variables, and functions for code generation

Blocks

MATLAB Function	Include MATLAB code in models that generate embeddable C code
MATLAB System	Include System object in model

Reuse the Same Variable with Different Properties
Reuse a variable with different properties when the code generator can determine the properties of each occurrence of the variable.
Eliminate Redundant Copies of Variables in Generated Code
Use coder.nullcopy to indicate that the code generator can allocate memory without initializing it.
Share Data Globally
Use global data with a MATLAB Function block.
Initialize Persistent Variables in MATLAB Functions
Specialized semantics impact the way that a function initializes persistent data.

Data Definition Considerations for Code Generation
Define data in MATLAB^® code intended for code generation.
Variables Definition for Code Generation
Define the class, size, and complexity of variables in MATLAB source code before using them.
Best Practices for Defining Variables for C/C++ Code Generation
Follow guidelines for defining variables in MATLAB code intended for code generation.
Supported Variable Types
Use data types that code generation supports.
Reassignment of Variable Properties
Reassign a variable with a value of different class, size, or complexity.
Code Generation for Complex Data
Use complex data in MATLAB code intended for code generation.
Code Generation for Sparse Matrices
Use sparse matrices in MATLAB code intended for code generation.
Code Generation for Constants in Structures and Arrays
Sometimes the code generator does not recognize constant structure fields or array elements.
Array Size Restrictions for Code Generation
The code generator and the target hardware constrain the maximum number of elements of an array.
Edit and Represent Coder Type Objects and Properties
Command line representation of coder type objects.