API Notes
group_by_dynamic
Not to confuse this one with groupby_dynamic, which is deprecated.
An example of using it:
>>> pl.DataFrame({"a": [1,4,8,12,16,23,29]}) \
>>> .set_sorted("a") \
>>> .group_by_dynamic("a", every="7i", start_by="datapoint", include_boundaries=True, closed="right", label="right") \
>>> .agg([pl.count(), pl.col("a").alias("ab")])
shape: (4, 5)
┌─────────────────┬─────────────────┬─────┬───────┬───────────┐
│ _lower_boundary ┆ _upper_boundary ┆ a ┆ count ┆ ab │
│ --- ┆ --- ┆ --- ┆ --- ┆ --- │
│ i64 ┆ i64 ┆ i64 ┆ u32 ┆ list[i64] │
╞═════════════════╪═════════════════╪═════╪═══════╪═══════════╡
│ 1 ┆ 8 ┆ 8 ┆ 2 ┆ [4, 8] │
│ 8 ┆ 15 ┆ 15 ┆ 1 ┆ [12] │
│ 15 ┆ 22 ┆ 22 ┆ 1 ┆ [16] │
│ 22 ┆ 29 ┆ 29 ┆ 2 ┆ [23, 29] │
└─────────────────┴─────────────────┴─────┴───────┴───────────┘