Get the sign of elements

Source code

Description

Get the sign of elements

Usage

<Expr>$sign()

Value

Expr

Examples

library(polars)

pl$DataFrame(a = c(.9, -3, -0, 0, 4, NA_real_))$
  with_columns(sign = pl$col("a")$sign())

#> shape: (6, 2)
#> ┌──────┬──────┐
#> │ a    ┆ sign │
#> │ ---  ┆ ---  │
#> │ f64  ┆ i64  │
#> ╞══════╪══════╡
#> │ 0.9  ┆ 1    │
#> │ -3.0 ┆ -1   │
#> │ -0.0 ┆ 0    │
#> │ 0.0  ┆ 0    │
#> │ 4.0  ┆ 1    │
#> │ null ┆ null │
#> └──────┴──────┘