GroupBy Max

Source code

Description

Reduce the groups to the maximum value.

Usage

<GroupBy>$max()

Value

aggregated DataFrame

Examples

library(polars)

df = pl$DataFrame(
  a = c(1, 2, 2, 3, 4, 5),
  b = c(0.5, 0.5, 4, 10, 13, 14),
  c = c(TRUE, TRUE, TRUE, FALSE, FALSE, TRUE),
  d = c("Apple", "Orange", "Apple", "Apple", "Banana", "Banana")
)
df$group_by("d", maintain_order = TRUE)$max()

#> shape: (3, 4)
#> ┌────────┬─────┬──────┬──────┐
#> │ d      ┆ a   ┆ b    ┆ c    │
#> │ ---    ┆ --- ┆ ---  ┆ ---  │
#> │ str    ┆ f64 ┆ f64  ┆ bool │
#> ╞════════╪═════╪══════╪══════╡
#> │ Apple  ┆ 3.0 ┆ 10.0 ┆ true │
#> │ Orange ┆ 2.0 ┆ 0.5  ┆ true │
#> │ Banana ┆ 5.0 ┆ 14.0 ┆ true │
#> └────────┴─────┴──────┴──────┘