Simulink: Can't change model workspace variables using setVariable

Paul

2022 10 31

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I'm running a Simulink model programmatically using parsim. I pass input data into a series of SimulationInput objects using the setVariable function, but when I run my model using parsim the model workspace isn't using the values I passed in. What gives?

for index = 1 : length(inputs)

simIn = Simulink.SimulationInput('MySimulation');

simIn = setVariable(simIn, "RefractTimeConstant",simulationParameters.RefractTimeConstant(index),"Workspace",'MySimulation');

simulationInputConfigs(end+1) = simIn;

end

simOuts = parsim(simulationInputConfigs, 'ShowSimulationManager', 'on');

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Björn Erik 2022-12-29

编辑：Björn Erik 2022-12-29

Did you find a solution to this? I have the exact same problem.. I'm trying to use the variable in a matlab-script in my simulinkmodel. Maybe that is the problem?

Paul 2022-12-29

在 MATLAB Online 中打开

I'm not the OP, just have the same username.

I ran this code in 2022a in the Live Editor and it worked fine. Note that I'm using sim, not parsim, though the OP said he had the same problem with sim and parsim. Also, I wan't sure how the variable simulationInputConfigs was initialized, so I didn't use it. The model mysim is just a Constant 1, sent through a Gain, where the Gain parameter is theGain (I hope that's clear). Also, in mysim I do not have the variable theGain defined in the model workspace. The output of the Gain block goes To Workspace. The end result is that y had the values 1:5, as expected.

Gains = 1:5;
for index = 1 : 5
    simIn(index) = Simulink.SimulationInput('mysim');
    simIn(index) = setVariable(simIn(index), "theGain",Gains(index),"Workspace",'mysim');
%    simulationInputConfigs(end+1) = simIn;
end
% check output for the expected result.
simOuts = sim(simIn, 'ShowSimulationManager', 'on');
for ii = 1:5
    y(ii) = simOuts(ii).y.Data(end);
end