https://observablehq.com/@observablehq/sample-datasets
Yahoo! Finance https://finance.yahoo.com/lookup
Cryptographical Mathematics by Robert Edward Lewand http://cs.wellesley.edu/~fturbak/codman/letterfreq.html
1983 ASA Data Exposition http://lib.stat.cmu.edu/datasets/
The New York Times https://www.nytimes.com/2019/12/02/upshot/wealth-poverty-divide-american-cities.html
ggplot2 “diamonds” dataset https://github.com/tidyverse/ggplot2/blob/master/data-raw/diamonds.csv
Flare visualization toolkit package hierarchy https://observablehq.com/@d3/treemap
Bureau of Labor Statistics https://www.bls.gov/
Character interactions in the chapters of “Les Miserables”, Donald Knuth, Stanford Graph Base https://www-cs-faculty.stanford.edu/~knuth/sgb.html
Matt Riggott/IOC https://www.flother.is/2017/olympic-games-data/
Dr. Kristen Gorman https://github.com/allisonhorst/palmerpenguins
Pizza Paradise, Observable https://observablehq.com/@observablehq/pizza-paradise-data
NOAA/Vega https://www.ncdc.noaa.gov/cdo-web/datatools/records https://github.com/vega/vega-datasets/blob/master/scripts/weather.py