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)
#> ┌─────────┬────────┐
#> │ lengths ┆ values │
#> │ ---     ┆ ---    │
#> │ i32     ┆ f64    │
#> ╞═════════╪════════╡
#> │ 2       ┆ 1.0    │
#> │ 1       ┆ 2.0    │
#> │ 1       ┆ 1.0    │
#> │ 1       ┆ null   │
#> │ 1       ┆ 1.0    │
#> │ 2       ┆ 3.0    │
#> └─────────┴────────┘