Hi Ryotaro,
私は日本語がネイティブではないので、この質問に英語で答えてみます。 ご理解のほどよろしくお願いいたします。
I understand that you are trying to save a ‘LSTM’ model to a ‘mat’ file for using it with the ‘Stateful Predict’ block in Simulink. Once you have finished training your model using the ‘trainNetwork’ function, you can directly save your model using the 'save' function. Following is a sample code to perform the given task:
net = trainNetwork(features,responses,layers,options);
save('lstm_model.mat', 'net'); % Saves the model as 'mat' file
loadedModel = load('lstm_model.mat');
net1 = loadedModel.net; % For loading the model in MATLAB
Once the model is saved, you can use it with the 'Stateful Predict' block of Simulink.
You can read more about the 'save' function here:
Hope this helps!