cleaning

BW #124: NATO Spending (solution)

Get better at: Working with Excel files, regular expressions, cleaning data, window functions, and plotting.

Jun 26, 2025 15 min read paid Featured

BW #124: NATO Spending

Get better at: Working with Excel files, regular expressions, cleaning data, window functions, and plotting.

Jun 25, 2025 3 min read paid Featured

BW #123: Missiles (solution)

Get better at: Web scraping, pivot tables, grouping, cleaning data, and using regular expressions

Jun 20, 2025 13 min read paid Featured

BW #123: Missiles

Get better at: Web scraping, pivot tables, grouping, cleaning data, and using regular expressions

Jun 19, 2025 3 min read paid Featured

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