meanTraces is too hard

[raacampbell]

The students spent too long on the loop in meanTraces. Even after completing it correctly, it became obvious that many of them didn't understand what they were doing. A big contributing factor to this is that they aren't running the code as they write it. So they aren't correcting errors or examining what the variables are.

Probably we should give them a completed meanTraces. Instead, they will focus on more easy stuff. During the preceding day's MATLAB tutorial we should set up the exercises in a way that encourages (requires?) them to get into the habit of moving baking and forth between editing and running.

[DylanMuir]

An alternative is to provide them with de-randomised data, so meanTraces becomes very simple.