Hello, I have data of 60users(each user data has different no. Of rows but same no. Of columns)and I have to split each user data into training and test set in 60,40% randomly and then combine all training data(of 60 users)in one matrix and all test data(of 60 users)in another matrix. I am using dividerand to split for each user. Can anyone please suggest how to use loop to do this task efficiently?