Data Viz Review

April 23, 2024

Messages, Warnings and Errors


  • Messages tell you what R is doing
  • Warnings tell you that something might be wrong
  • Errors tell you that something is definitely wrong
    • Locate the error line number in the console and check your code
    • Error line tells you about where the error occurred, not exact
    • Errors are normal, don’t freak out!
    • In fact, you should practice making errors to learn how to fix them

Your boss wants you to…

  • Visualize trends in liberal democracy since the end of WWII for countries in South Asia
  • See how regions compare in terms of levels of corruption in 2015
  • View the relationship between GDP per capita and electoral democracy in 2020

Could You Reproduce It?


  • Have a look at my “Democracy Around the World” Shiny app
  • Can you reproduce the visualizations in the app using the V-Dem data?
  • What are the steps you would take to do so?

Homework 1


IAFF 6501 Website