1. Watch the Introduction to Writing Your Own Functions in R video:
2. Do Writing Functions
3. Do Task 1 of Use and Modify.
4. Watch the How Functions Execute video:
5. Do Task 2 Use and Modify.
6. Watch the Setting Default Values for Arguments video:
7. Do Default Arguments.
8. Watch the When To Use Named And Unnamed Arguments video:
9. Watch the Combining Functions video:
10. Do Combining Functions.
11. Watch the Calling Functions From Inside Other Functions video:
12. Watch the RStudio Tips and Tricks for Working With Functions video:
13. Take a nap, go for a walk, read a book, or play a video game.