Polars 2 · Expressions, grouping and joins
Group and aggregate
Compute several aggregates per group.
df.group_by("team").agg(
pl.len().alias("people"),
pl.col("age").mean().alias("avg_age"),
)
Official Polars 2 documentation
More expressions, grouping and joins commands
- Conditional columns
- Join two DataFrames
- Handle missing values
- Work with strings
- Work with dates
- Window functions
All expressions, grouping and joins commands · Polars 2 cheatsheet