Importing and recoding data

Lecture 9

Dr. Mine Çetinkaya-Rundel

Duke University
STA 199 - Fall 2024

September 26, 2024

Warm-up

While you wait…

  • Go to your ae project in RStudio.

  • Make sure all of your changes up to this point are committed and pushed, i.e., there’s nothing left in your Git pane.

  • Click Pull to get today’s application exercise file: ae-09-age-gaps-sales-import.qmd.

  • Wait till the you’re prompted to work on the application exercise during class before editing the file.

Announcements

Midterm things

  • Focus
  • Format
  • Prep
  • Review
  • Accommodations

From last time

Finish up: ae-08-durham-climate-factors

  • Go to your ae project in RStudio.

  • Open ae-08-durham-climate-factors.qmd and pick up at “Recode and reorder”.

Reading data into R

Reading rectangular data

  • Using readr:
    • Most commonly: read_csv()
    • Maybe also: read_tsv(), read_delim(), etc.
  • Using googlesheets4: read_sheet() – We haven’t covered this in the videos, but might be useful for your projects

Application exercise

Goal 1: Reading and writing CSV files

  • Read a CSV file

  • Split it into subsets based on features of the data

  • Write out subsets as CSV files

Age gap in Hollywood relationships

What is the story in this visualization?

ae-09-age-gaps-sales-import - Part 1

  • Go to your ae project in RStudio.

  • If you haven’t yet done so, make sure all of your changes up to this point are committed and pushed, i.e., there’s nothing left in your Git pane.

  • If you haven’t yet done so, click Pull to get today’s application exercise file: ae-09-age-gaps-sales-import.qmd.

  • Work through Part 1 of the application exercise in class, and render, commit, and push your edits.

Goal 2: Reading Excel files

  • Read an Excel file with non-tidy data

  • Tidy it up!

Sales data

Are these data tidy? Why or why not?

Sales data

What “data moves” do we need to go from the original, non-tidy data to this, tidy one?

ae-09-age-gaps-sales-import - Part 2

  • Go to your ae project in RStudio.

  • If you haven’t yet done so, make sure all of your changes up to this point are committed and pushed, i.e., there’s nothing left in your Git pane.

  • If you haven’t yet done so, click Pull to get today’s application exercise file: ae-09-age-gaps-sales-import.qmd.

  • Work through Part 2 of the application exercise in class, and render, commit, and push your edits.