• Ads: ACSU/URMC/WICC event Monday at 5:30; WICC lunch bunch.
• Another approach to massive scale differences by W.E.B. Du Bois and an attempt to recreate it in d3.
• Lisa Charlotte Rost on reading scatter plots.

Today: More on scales and guides.

We're working with Country Profile data from the world bank. Here are some of the issues we face:

• Ungrouped data.
• Wordy variables.
• Missing data.
• Incorrect data.
• Data dispersion.