Today

• (Static) Data visualization using ggplot2.

Announcement

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

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

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

Q&A

• Install Linux R binaries from Posit Package Manager.

• Q: Why my grouping variable is dropped after summarise? A: Read documentation of summarise.