Created
Sep 1, 2025 10:14 PM
Multi-select
Status
Not started
What it does:
Split-Apply-Combine—group data, compute stats, and merge results.
Key Concepts:
- Grouping: Split data by a key (e.g., "Country").
- Aggregation: Compute summaries (
sum(),mean()). - Transformation: Modify groups without collapsing (e.g., normalize).
Why it matters:
Enables complex aggregations (e.g., "average sales per region").
GroupBy‣