Data wrangling: relational data and factors

Overview

• Introduce relational data
• Demonstrate how tables can be linked to one another
• Demonstrate methods in dplyr for linking and merging related tables
• Practice joining tables
• Define factors
• Demonstrate how to transform and reorder factors for visualizations
• Practice transforming factors

Before class

• Read Chapters 13, 15 from R for Data Science
  • Do not complete exercises 13.4.6.2-3 – we will be completing these as in-class exercises

Class materials

• Relational data: a quick review
• Practice using relational data
• Practice transforming and visualizing factors

What you need to do after class

• Complete the wrangling and visualizing data homework