EDS 221
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syllabus
daily materials
day 1 (8/10)
day 2 (8/11)
day 3 (8/12)
day 4 (8/13)
day 5 (8/14)
day 6 (8/17)
day 7 (8/18)
day 8 (8/19)
day 9 (8/20)
day 10 (8/21)
Problem solving
Day 9
Thursday August 20
th
, 2026
On this page
Morning session: Troubleshooting
Afternoon session: Exploratory Data Analysis
Additional materials
Morning session: Troubleshooting
Troubleshooting
Reprex practice
Afternoon session: Exploratory Data Analysis
Exploratory Data Analysis
Additional materials
Object of type closure is not subsettable
A great talk by Jenny Bryan about debugging tools and mindset.
Getting help: R4DS ch 8