Compute the sum of the sub-arrays

Description

Compute the sum of the sub-arrays

Usage

<Expr>$arr$sum()

Value

A polars expression

Examples

library("polars")

df <- pl$DataFrame(
  values = list(c(1, 2), c(3, 4), c(NA, 6))
)$cast(pl$Array(pl$Float64, 2))
df$with_columns(sum = pl$col("values")$arr$sum())

#> shape: (3, 2)
#> ┌───────────────┬─────┐
#> │ values        ┆ sum │
#> │ ---           ┆ --- │
#> │ array[f64, 2] ┆ f64 │
#> ╞═══════════════╪═════╡
#> │ [1.0, 2.0]    ┆ 3.0 │
#> │ [3.0, 4.0]    ┆ 7.0 │
#> │ [null, 6.0]   ┆ 6.0 │
#> └───────────────┴─────┘