How do I programmatically change the subsystem reference in a Simulink model on MacOS using MATLAB R2022b?

I am running a Simulink model from MATLAB script on MacOs 12.x with MATLAB R2022b.

I'm using a model with subsystems which need to be changed based on my requirements for my project. I have two subsystems called "product_2" and "product_3" that I'd like to switch between without opening Simulink.

Is there a way to change the subsystem in the Simulink model without manually changing from the GUI?

Answer 1

[MathWorks Support Team]

One way to change the subsystem reference in the MATLAB editor is by using the “set_param” function in this way:

set_param(path_subsys_ref,'ReferencedSubsystem',subsys_var);

where "path_subsys_ref" is the path to Subsystem Reference / name of the Simulink model, and "subsys_var" is the desired Subsystem file name. In this case, the "path_subsys_ref" would be "test_model" and "subsys_var" would be both "product_2" and "product_3".

As an example, here is some code that would help with programmatically changing the Subsystem Reference:

simIn = Simulink.SimulationInput("test_model");

load_system("test_model")

set_param('test_model/Subsystem Reference','ReferencedSubsystem','product_2'); %Select model name, then the block reference

out = sim(simIn);

out.simout.Data