Not a function. Clears the Command window workspace. Prompts for a numerator and denominator, but doesn't tell you that they are not the numerator and denominator of the overall system to be tested. No use of MATLAB vectorization. Requires the Control Toolbox, but doesn't say so. And so on...
Instead of submitting three different routh codes, the author should zip them together and make them one (questionable) submission.
