How can I get signal dimensions in Simulink model

Question

I have a question.

After simulate a simulink model I need to get signal dimensions of each line using MATLAB command.

I get line handles by following

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Answer 1

You can solve it the following way.

1. Enable signal logging for the desired signals (Properties). For example set the name to custom and signalone.
2. If you actually don't want to log the signal, set Limit data points to last to 1, so you avoid storing unused data.
3. Go to SImulink preferences and enable signal logging, default output name is logsout
4. after simulation you'll get a dataset logsout in your workspace

now evaluate this dataset as follows:

% returns data, if data limit is set to 1 it's a coloumn 
% vector with just the last value
data = logsout.get('signalone').Values.Data

you can now just use the size of this vector and you know the dimension of the signal

[~,dim]=size(data)

or in one line:

[~,dim]=size(logsout.get('signalone').Values.Data)

If you have a a lot of signals and you want to evaluate them at once, give your signals convenient output-names and use a loop for iterating through a string vector with all your signal names.

As you say you want the dimensions of "all" (are you sure?) signals I think it is more convenient to just check "Enable signal logging" in each signal property and do all further definitions in the Simulink preferences where you have a list to manage all signals.