- My girlfriend left me because I’m insecure.

- Nevermind, she’s back. She just went to the bathroom.

- Feedback on Brightspace
- Self-assessment reflections

- What are you still struggling with?
- Example problems
- Creating matrices
- Selecting matrix elements

- R files
- R notebooks

- Finish chapters 4 and 5

Everyone has the 4th of July off except fire.

Fireworks on the 4th of July.

- Guest lecture next Thursday
- Exam on February 20

- Factors vs. Booleans vs. Strings
- Choosing elements in a data frame
- with indexing
- with the ‘$’ notation
- with subset
- combining subset and indexing

- Networks in R
- Network Analysis in R - chapter 1
- Visualization exercise
- Use R to visualize your family network
- I’ll feature my favorites