Hello my friend from Germany, I think I can help you with your Matlab exercise, I'm on my 4th year graduation in electrical engineering, so I've been passed through a lot of the courses that use Matlab and some others programming languages. I already done courses like Signals and Systems, Linear Systems Control and Signal Processing, Data Structure and algorithms, so I'm very comfortable in work with Matlab. If you see that I'm the right person to work with you, talk to me. Hope to hear from you soon! Cheers!