AE 11: Iterating in R

Application exercise
Modified

March 3, 2025

Packages

We will use the following packages in this application exercise.

  • {tidyverse}: For data import, wrangling, and visualization.
  • {palmerpenguins}: For the penguins dataset
  • {rvest}: For scraping HTML files.
  • {robotstxt}: For verifying if we can scrape a website.

Part 1: Iterating over columns

Your turn: Write a function that summarizes multiple specified columns of a data frame and calculates their arithmetic mean and standard deviation.

# add code here

Part 2: Data scraping

This will be done in the iterate-cornell-review.R R script. Save the resulting data frame in the data folder.