Today

• Data transformation using dplyr.

Announcement

• Quiz Import and Tidy Data due Feb 2 @ 11:59pm.

• Quiz Data Transformation using dplyr due Feb 9 @ 11:59pm.

• HW2 is posted and due Feb 9 @ 11:59pm. Start early. Ask questions on Slack or office hours.

Q&A

• HW2 Q2.1 and Q2.2 not working? I expect so!

• Style guide.

• Q: My computer is not good enough for this class? A: Understand the computer (RAM, hard disk) and be careful when handling big data. Or we can also use Hoffman2 (40GB disk space quota under home, 2TB under $SCRATCH).

• Install Linux R package binaries from Posit Package Manager.

• Time zones (Jason’s excellent Slack question).