Get the lengths of runs of identical values

Source code

Description

Get the lengths of runs of identical values

Usage

<Expr>$rle()

Value

Expr

Examples

library("polars")

df = pl$DataFrame(s = c(1, 1, 2, 1, NA, 1, 3, 3))
df$select(pl$col("s")$rle())$unnest("s")

#> shape: (6, 2)
#> ┌─────┬───────┐
#> │ len ┆ value │
#> │ --- ┆ ---   │
#> │ u32 ┆ f64   │
#> ╞═════╪═══════╡
#> │ 2   ┆ 1.0   │
#> │ 1   ┆ 2.0   │
#> │ 1   ┆ 1.0   │
#> │ 1   ┆ null  │
#> │ 1   ┆ 1.0   │
#> │ 2   ┆ 3.0   │
#> └─────┴───────┘