AE 02: Bike rentals in DC

Exploring multivariable relationships

Announcements

• Professor Tackett will have office hours Thursday, August 26,9:30a - 11:30a on Zoom.
  • Zoom Link: https://duke.zoom.us/j/96752208722
  • Need your Duke NetID & password to join.
  • Full office hours start August 30.
• We’ll use the “August 25 Lecture” thread pinned to the top of Ed Discussion: https://edstem.org/us/courses/8350/discussion/

Questions about the course?

Questions from the prepare assignment?

Tour of R and RStudio

Let’s take a tour of R and RStudio. Go to vm-manage.oit.duke.edu and open the STA210 Docker containers.

• Tour of RStudio interface

• Console: Use R as a calculator by typing the following in the console:

3 * 5 + 10

x <- 3
x + x^2

x <- 1:10
x*7

• Environment
• Loading and viewing a data frame
• Accessing a variable in a data frame
• R functions

AE-02: Bikeshare Analysis

• Run the following code in the console to download the data and Rmd file for today’s application exercise. (Note: You will learn how to clone a GitHub repo in tomorrow’s lab.) Your RStudio may refresh, and you will see the R Markdown files and data set.

usethis::use_course("sta210-fa21/ae-02")

Understanding the R Project & R Markdown

• R Project
• R Markdown file

R Markdown vs. Console

• Run the following in the console

x <- 2
x * 3

• Then add the following in an R code chunk in your R Markdown file.

x * 3

• What happens? Why the error?
• Let’s fix it!

Bikeshare analysis

GitHub demo

• Configure git using SSH – covered in lab tomorrow!
• Clone repo + start new project
• Update document
• 🧶 ✅ ⬆️ knit, commit, push
• Check changes in GitHub repo
• See Commit history

Submission

There is nothing to submit for today’s AE. Starting Monday, you will submit push your AE to your GitHub repo.