Bulletin

Misc logistics
- Emails: include in title ‘STA 199’
- Office hours this week, see website
Prep quiz 01 due Wednesday Jan 19 (take in sakai) under “Tests & Quizzes” on the left hand side. (quiz 01 will not be graded)
Lab 01 due Monday, January 17 at 11:59pm to Gradescope.
- link relevant pages for each question and link all pages for “Workflow and formatting”

Questions?

logistics
lab
prep material

Optional aside: downloading local R

In this course you can always access the R containers: https://vm-manage.oit.duke.edu/containers

But for those of you who wish to, you can download R and RStudio “locally” to your own computer. Below are some resources to do this.

There are 3 things to download: (1) the R programming language, (2) the RStudio integrated development environment (IDE) and (3) Git

Today

By the end of today you will…

comfortably navigate RStudio fundamentals
be able to define common terms including: data frame, function, variable, package
interact with Git from RStudio (committing and pushing)
use a few functions, including: glimpse(), count(), group_by() and summarize()
create a reproducible report via today’s application exercise using R Markdown

Loading and working in today’s application exercise

Open RStudio: https://vm-manage.oit.duke.edu/containers
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

GitHub demo
- configure git using SSH (instructions from lab reproduced below)
- click here to clone a GitHub repo and make a new RStudio project
- Visit course organization page and navigate to your ae02 repository

Click on the green CODE button, select SSH (this might already be selected by default). Click on the clipboard/square icon to copy the repo URL. Next, in RStudio, navigate File > New Project > Version Control > Git > paste the SSH URL > Create Project

Github demo cont.
- update document
- knit, commit and push
- check change in GitHub repo
- see commit history
RStudio tour
- Environment
- R functions
- Loading and viewing a data frame
- Accessing a variable in a data frame

Configuring SSH and GitHub (instructions)

Note: if you have already done this, you do NOT need to do this again

configure ssh

First, type credentials::ssh_setup_github() into your console.
Second, R will ask “No SSH key found. Generate one now?” You should click 1 for yes.
Third, you will generate a key. It will begin with “ssh-rsa….” R will then ask “Would you like to open a browser now?” You should click 1 for yes.
Fourth, you may be asked to provide your username and password to log into GitHub. This would be the ones associated with your account that you set up. After entering this information, you should paste the key in and give it a name.

configure git

Configure git by running the following code in the terminal. Fill in your GitHub username and the email address associated with your GitHub account.

git config --global user.name 'username'
git config --global user.email 'emailaddress'

You should not have to do this every time.

Submitting application exercises

Once you have completed the activity, push your final changes to your GitHub repo. Make sure you committed at least three times. Check that your repo is updated on GitHub, and that’s all you need to do to submit application exercises for participation.
ae02 will not be graded.

Tour of RStudio, R Markdown, and GitHub + Practice

01.12.2022