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David Robinson

Data Scientist at Stack Overflow, works in R and Python.

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Introduction to R package: broom

Welcome to the webpage for the Princeton OPR seminar: Introduction to R package: broom.


You’ll need to install:

  • Install the latest version of R (3.2.3), which can be done here. If you already have R installed, make sure your version is at least 3.2.0: if it’s not, upgrade!
  • Install RStudio, which can be found here.

You’ll need to install several R packages, which you can do in R with:

install.packages(c("ggplot2", "dplyr", "tidyr", "broom"))
  • Live Code Feed
  • R Error Message Cheat Sheet: contains some common R error messages. If you get an error while running a line that you expect to work (perhaps because you saw it on the screen), you can check these examples. (In particular, check your spelling and capitalization carefully).
  • Data Wrangling Cheat Sheet: this sheet is a great summary of dplyr and tidyr operations, two packages used today.

Other Resources

Relevant Code

We’ll be studying a set of United Nations voting data that can be found here:

  • Anton Strezhnev; Erik Voeten, 2013, “United Nations General Assembly Voting Data”, hdl:1902.1/12379 UNF:5:s7mORKL1ZZ6/P3AR5Fokkw== Erik Voeten [Distributor] V7 [Version]

You can download it using the following line of code:


And load the descriptions dataset with: