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

Question

Roop 2024-7-18

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https://ww2.mathworks.cn/matlabcentral/answers/2138481-is-it-possible-to-create-global-variables-objects-of-custom-classes-in-simulink

编辑： Roop 2024-8-5，13:25

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?

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Answer 1

Yash Sharma 2024-8-5，9:45

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https://ww2.mathworks.cn/matlabcentral/answers/2138481-is-it-possible-to-create-global-variables-objects-of-custom-classes-in-simulink#answer_1494636

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!

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Roop 2024-8-5，13:24

编辑：Roop 2024-8-5，13:25

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?

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