Due in class, Wednesday 14 Oct.
Continue to practice your function writing and plyr skills with the function and plyr drills.
Obviously, all the answers are there so how much you get out of this exercise is up to you. I would strongly recommend that you try each problem before looking at the answer.
Graded out of fifteen. You can get 1 point per 3 completed drills, or 3 points for each drill for which you suggest a significantly better answer (with justification).
One point will be deducted for each of the following style violations: