Is it possible to create global variables (objects) of custom classes in Simulink?

Hello,

I have a custom class that returns an object of complex data types, such as structs, variable-data type cell arrays, and AppDesigner classes. I am looking to use this object in multiple MATLAB Fcn blocks to call different methods at different points in my simulation.

Previous Attempts:

Base Workspace - tried initializing object in PreLoadFcn callback but it is recognized as undefined in the MATLAB Fcn block

Model Workspace - initialized the object successfully as object of my custom class, but I get the

error: "Expression 'gObj' for initial value of data 'gObj' must evaluate to logical or supported numeric type."

Any suggestions?

Answer 1

[Yash Sharma]

Hi Roop,

You can take a look at the following Matlab answer to answer your query.

https://www.mathworks.com/matlabcentral/answers/412769-can-i-use-matlab-classes-in-simulink

Hope it helps!

[Roop]

Hi Yash,

Thanks for linking the resources! I had a chance to look through them, but I could never find any functionality that allows me to manipulate the same instance of a class (same object) across multiple MATLAB Fcn Blocks or MATLAB System Blocks.

In all of the linked examples, each block is creating a new instance of the class. Do you have any help regarding this question?