GroupBy Var

Source code

Description

Reduce the groups to the variance value.

Usage

<GroupBy>$var()

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)$var()

#> shape: (3, 4)
#> ┌────────┬──────┬───────────┬──────────┐
#> │ d      ┆ a    ┆ b         ┆ c        │
#> │ ---    ┆ ---  ┆ ---       ┆ ---      │
#> │ str    ┆ f64  ┆ f64       ┆ f64      │
#> ╞════════╪══════╪═══════════╪══════════╡
#> │ Apple  ┆ 1.0  ┆ 23.083333 ┆ 0.333333 │
#> │ Orange ┆ null ┆ null      ┆ null     │
#> │ Banana ┆ 0.5  ┆ 0.5       ┆ 0.5      │
#> └────────┴──────┴───────────┴──────────┘