Week 6: readr and exploratory data analysis

DATA 412/612 · October 7

Lectures

• 6.1 readr: Import and Export(PDF)
• 6.2 readr: Parsers(PDF)
• 6.3 Exploratory Data Analysis(PDF)

Labs

• Lab 6: Import, Parse, and Explore(PDF)
• Lab 6 solutions (password)

Additional readings

• R for Data Science: Data import
• R for Data Science: Exploratory data analysis
• STAT 545: Writing and reading files
• haven: SPSS, Stata, and SAS files

Discussion

• A CSV opens in Excel but looks wrong in R. What would you check first: encoding, delimiter, column types, or skipped rows?
• Name one plot and one table you would always make before trusting a new dataset.