How to save to mat file sequentially using a loop and simout?

Hi everyone!

I'm getting stuck on a simple part of my code. I have a simulink simulation that exports to Workspace two outputs: Fault and Ir. I'm trying to do a loop to automatically run my simulation and save these outputs. Here's the code:

for  i = 1:100
simOut(i) = sim('mymodel');
filename1(i) = 'Fault.mat(i)';
save(filename1)
filename2(i) = 'Ir.mat(i)';
save(filename2)
end

But I'm getting:

Unable to perform assignment because the indices on the left side are not compatible with the size of the right.

How to solve this?

Thank you in advance!

Answer 1

[Harsh]

Hi Gustavo,

The output from “sim” function is an object which should be stored in a cell array. Furthermore the “filename1(i)” and “filename2(i)” in your code will just be strings with values as “Fault.mat(i)” and “Ir.mat(i)” respectively. To dynamically save files depending on the iteration you should use “sprintf” instead. Also the variable name to save needs to be given as input in the “save” function.

Below is the code to save the results from your simulation model:

simOut=cell(100,1); 
filename1=[]; 
filename2=[]; 

for i = 1:100 
        % Run the simulation 
        simOut{i} = sim('mymodel'); 
        % Extract outputs 
        Fault = simOut{i}.Fault; 
        Ir = simOut{i}.Ir; 
        % Save with proper dynamic filename 
        filename1 = sprintf('Fault_%d.mat', i); 
        save(filename1, 'Fault'); 
        filename2 = sprintf('Ir_%d.mat', i); 
        save(filename2, 'Ir'); 
end