Relationships among numerical variables

Swirl is an R package that provides guided lessons to guide you through (and review) the tests we are learning. These lessons should serve as a bridge between all the code provided above and the key functions and concepts from each lecture set. Swirl lessons are noted in the page for each lecture. A full course lesson (all lessons combined) can also be downloaded using the following instructions.

• install the "swirl" package

• run the following code once on the computer to install a new course

  • library(swirl)

  • install_course_github("jsgosnell", "JSG_swirl_lessons")

• start swirl!

  • swirl()

• then follow the on-screen prompts to select the lessons you want

  • Here we will focus on the lessons on regression and correlation

• TIP: If you are seeing duplicate courses (or odd versions of each), you can clear all courses and then re-download the courses by

  • exit swirl using escape key or bye() function

  • uninstall_all_courses()

  • then reinstall courses as needed

  • when you restart swirl with swirl(), you may need to select

    • 2. No. Let me start something new