Multiply two expressions

Source code

Description

Method equivalent of multiplication operator expr * other.

Usage

<Expr>$mul(other)

Arguments

other

Numeric literal or expression value.

Value

Expr

See Also

• Arithmetic operators

Examples

library("polars")

df = pl$DataFrame(x = c(1, 2, 4, 8, 16))

df$with_columns(
  `x*2` = pl$col("x")$mul(2),
  `x * xlog2` = pl$col("x")$mul(pl$col("x")$log(2))
)

#> shape: (5, 3)
#> ┌──────┬──────┬───────────┐
#> │ x    ┆ x*2  ┆ x * xlog2 │
#> │ ---  ┆ ---  ┆ ---       │
#> │ f64  ┆ f64  ┆ f64       │
#> ╞══════╪══════╪═══════════╡
#> │ 1.0  ┆ 2.0  ┆ 0.0       │
#> │ 2.0  ┆ 4.0  ┆ 2.0       │
#> │ 4.0  ┆ 8.0  ┆ 8.0       │
#> │ 8.0  ┆ 16.0 ┆ 24.0      │
#> │ 16.0 ┆ 32.0 ┆ 64.0      │
#> └──────┴──────┴───────────┘