How can I access to the Model Workspace from my Simulink file from a Matlab function block

I have created a function in a .m file which is used in a Matlab Function Block inside a Simulink model. There is a parameter that the .m function uses which is created in the Model Workspace, since it is impossible to connect that variable to a constant block, how can I access to the Model Workspace to extract the variable I want for my .m function?

[Laurenz Frederik Bareiß]

did you find a solution for that? I'm currently facing exactly the same problem...

cheers :)

[Pablo Díez]

Hi Laurenz,

Yes, you need to define the Model Workspace.

Check this link: https://es.mathworks.com/help/simulink/slref/simulink.modelworkspace.html

Then, use getVariable to extract the variables you want.

[Dimuthu Arachchige]

getVariable is not identified in the Matlab function block in simulink. Also the workspace varible. How to solve these issues?

Answer 1

[Fangjun Jiang]

In the MATLAB Function block, click "edit data", add a data "MyVar", specify it as a "parameter" of the MATLAB Function block.

In the Simulink model's "Model Workspace", make sure there is a variable called "MyVar", then you are all set.

For a Simulink model parameter, it always looks for it first in the "Model Workspae" and then the "base workspace".

[Dimuthu Arachchige]

Can we define a structure variable as a parameter? Because I am trying to read the stereoParameters for image rectification and it is not a scalar. I tried to define the structure varible as you suggested, but got an error.

Model Error:

Expression 'stereoParams' for initial value of data 'stereoParams' must evaluate to logical or supported numeric type.

[FEDERICO]

I love you