Today

  • Data transformation with dplyr (cont’d).

Announcement

  • Quiz Import and Tidy Data due Feb 2 @ 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 our 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).