MATLAB: Can’t save Simulink simulation results after changing parameter

MATLABparametersimulinkvariation

Hey everybody,

so I have a Simulink simulation where I vary a parameter

for i=1:length(parameter)
 Input_var=parameter(i)
 sim(modelname)     
 simout_store(:,i)=simout(:,1) %simout is a "to workbench" output in the simulation
end

But all I get is this error "Subscripted assignment dimension mismatch." How can I fix this? I just want to save the results after every simulation before it gets overridden

Best Answer

Use a cell array

simout_store{i}=simout(:,1)

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Probably sim_out is sometimes empty. You cannot store empty results in a numeric array. Use a cell array instead.

sim_out_store{i} = sim_out(:,1);

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Yes, this is possible using the set_param function. Note that the powergui block changed in R2015a (I believe) to be more "Simulink-like", so I'm working off the latest version when I tried this out.

To change the model's stop time is a global model setting, so you can do something like:

>> modelName = 'myModel';
>> load_system(modelName);
>> set_param(modelName,'StopTime','50')

To change the powergui block properties, you have to use the block name. For example:

>> blockName = 'myModel/powergui'; % You can obtain this by selecting the block and typing gcb
>> set_param(blockName,'SimulationMode','Discrete')
>> set_param(blockName,'SolverType','Tustin/Backward Euler (TBE)')
>> set_param(blockName,'SampleTime','1e-6')

- Sebastian

Best Answer

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