How to dynamically change Simulink variables from MATLAB App Designer after simulation is initiated

I have designed an app using the MATLAB App Designer that has a slider. I would like to assign the value of the slider in the app to a variable in my Simulink model. I have tried using

assignin('base', 'variableName', sliderValue);

in the function SliderValueChanged(), however while I can see that the value of variableName changes in the MATLAB workspace, it does not change in the Simulink model: a constant block set equal to variableName remains at the value of variableName at t=0 s is used for all time). Is there a way to have the Simulink model update variableName after model execution has begun?

Answer 1

[Jon]

You should be able to use set_param, for this purpose.

So for example:

 set_param('mymodel/Gain','Gain',num2str(11))

[Daniel Williams]

Thank you Jon, this worked.

[Jon]

That's great, thanks for letting me know.