1.4 — Data Wrangling — Class Content

Meeting Dates

Wednesday, September 7, 2022

Overview

Today we will cover the heart of tidyverse and use it for “data wrangling”. Today will again be a lot of content thrown at you, so you can look back at this as a reference all semester. Then we will do more practice problems.

Readings

• Chs. 5, 10-12, 18 in Wickham & Grolemund, R for Data Science

References by Package/Task

• tibble
  • R For Data Science, Chapter 10: Tibbles
• readr and importing data
  • R For Data Science, Chapter 11: Data Import
  • R Studio Cheatsheet: Data Import
• dplyr and data wrangling
  • R For Data Science, Chapter 5: Data Transformation
  • R Studio Cheatsheet: Data Wrangling (New version)
• tidyr and tidying or reshaping data
  • R For Data Science, Chapter 12: Tidy Data
  • R Studio Cheatsheet: Data Wrangling
  • R Studio Cheatsheet: Data Import
• joining data
  • R For Data Science, Chapter 13: Relational Data
  • R Studio Cheatsheet: Data Transformation

R Practice

Answers from last class’ practice problems on base R are posted on that page.

Today you will be working on R practice problems on data wrangling Answers will be posted later on that page.

Slides

Below, you can find the slides in two formats. Clicking the image will bring you to the html version of the slides in a new tab. The lower button will allow you to download a PDF version of the slides.

I suggest printing the slides beforehand and using them to take additional notes in class (not everything is in the slides)!

Download as PDF