cleaning

BW #122: Economic growth (solution)

Get better at: Excel files, cleaning data, working with multi-indexes, window functions, and plotting

Jun 12, 2025 13 min read paid Featured

BW #122: Economic growth

Get better at: Excel files, cleaning data, working with multi-indexes, window functions, and plotting

Jun 12, 2025 3 min read paid Featured

# BW #111: State taxes (solution)

Get better at: Excel files, cleaning data, regular expressions, multi-indexes, and plotting

Mar 27, 2025 10 min read paid Featured

# BW #111: State taxes

Get better at: Excel files, cleaning data, regular expressions, multi-indexes, and plotting

Mar 26, 2025 3 min read paid Featured

BW #100: Sports betting (solution)

Get better at: Cleaning data, grouping, and plotting

Jan 9, 2025 12 min read paid Featured

BW #100: Sports betting

Get better at: Cleaning data, grouping, and plotting

Jan 8, 2025 4 min read paid Featured

BW #98: Retail sales (solution)

Get better at: Cleaning data, plotting, dates and times, and window functions

Dec 26, 2024 13 min read paid Featured

BW #98: Retail sales

Get better at: Cleaning data, plotting, dates and times, and window functions

Dec 25, 2024 3 min read paid Featured

BW #97: Drones (solution)

Get better at: Cleaning data, plotting, interpolation, pivot tables, and multi-indexes

Dec 19, 2024 13 min read paid Featured

BW #97: Drones

Get better at: Cleaning data, plotting, interpolation, pivot tables, and multi-indexes

Dec 18, 2024 3 min read paid Featured

BW #91: Roller coasters (solution)

Get better at: web scraping, cleaning data, text encodings, joins, method chaining, and crosstabs.

Nov 7, 2024 12 min read paid

BW #91: Roller coasters