How do I display simulink simulation data as a table

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I would like to generate a simple table with the data from a Simulink simulation. Basically just a table with column labels in the top row, time in the first column and the data from logged values in each column. How do I generate this table?

I just want my model to put out something I can read from in Matlab easily to generate other tables. I have been using the export function in the simulink data inspector to get the data to excel, but I would like to move to dealing with the tables in Matlab as I have to run a bunch of simulations simultaneously and compile the data from multiple simulations into tables.

I am struggling finding ways to reference the data from simulink output in codes to write scripts to generate the tables that I want and at this point can't seem to reference the output data.

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Answer 1

Ayush Modi 2024-4-12

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Hi Dieter,

I understand you want to get the output of simulink model in the MATLAB workspace, so that you can create a table from that data.

Please refer to the following MathWorks documentation for information on how to save or log the simulation data to the workspace:

https://www.mathworks.com/help/simulink/ug/export-simulation-data-1.html

Once you have the data in the workspace, here is how you can create a table with the specified requirement:

% Assuming your data is logged to a variable named 'logsout'
% and you want to create a table with time and these signals
% tout is the time output from the simulation data
% Initialize a table with the time column
T = table(tout, 'VariableNames', {'Time'});
% Loop through each element in the dataset to add it to the table
for i = 1:logsout.numElements
    % Get the signal name
    signalName = logsout.getElement(i).Name;
    
    % Get the signal data
    signalData = logsout.getElement(i).Values.Data;
    
    % Add the data as a new column in the table
    T.(signalName) = signalData;
end
% Now, T is a table with time and all your logged signals

Hope this helps!

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Dieter 2024-4-16

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Thank you so much for your help. I think I am getting closer. I have it somewhat working but it stops for some reason on the 8th column and doesn't continue to the final column (Column 186). I had to make some mods to call up the right locations but I think I have done essentially what you have said.

It seems there is a mismatch in the number of rows and the height of the table but I can do it manually if I just put the number in as 8 instead of having the loop calculate it. Any idea why it would stop here?

Error using . (line 507)

To assign to or create a variable in a table, the number of rows must match the

height of the table.

Error in TableGenerationScript (line 11)

T.(signalName)=signalData;

Here's the code:

%Generate a table with a time column and the variable name set to time.
Time=out.tout
Data = table(Time, 'VariableNames', {'Time'});
%Loop through each dataset element to add it to the table
for i=1:out.logsout.numElements
    %Get signal name
    signalName=out.logsout.getElement(i).Name;
    %Get signal data
    signalData=out.logsout.getElement(i).Values.Data;
    %Add the data as a new column in the table
    Data.(signalName)=signalData;
end

Dieter 2024-4-17

I resolved the second issue. Thanks for the help. Turned out I had different vector formats being put out from signal converters and once I set those all to 1-D array this method worked perfectly.

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