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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  ┆ f64  │
#> ╞══════╪══════╡
#> │ 0.9  ┆ 1.0  │
#> │ -3.0 ┆ -1.0 │
#> │ -0.0 ┆ -0.0 │
#> │ 0.0  ┆ 0.0  │
#> │ 4.0  ┆ 1.0  │
#> │ null ┆ null │
#> └──────┴──────┘