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Compute the mean horizontally across columns

Description

Compute the mean horizontally across columns

Usage

pl$mean_horizontal(..., ignore_nulls = TRUE)

Arguments

… \<dynamic-dots\> Columns to aggregate horizontally. Accepts expressions. Strings are parsed as column names, other non-expression inputs are parsed as literals.
ignore_nulls A logical. If TRUE, ignore null values (default). If FALSE, any null value in the input will lead to a null output.

Value

A polars expression

Examples

library("polars")

df <- pl$DataFrame(
  a = c(1, 8, 3),
  b = c(4, 5, NA),
  c = c("x", "y", "z")
)

df$with_columns(
  mean = pl$mean_horizontal("a", "b")
)

#> shape: (3, 4)
#> ┌─────┬──────┬─────┬──────┐
#> │ a   ┆ b    ┆ c   ┆ mean │
#> │ --- ┆ ---  ┆ --- ┆ ---  │
#> │ f64 ┆ f64  ┆ str ┆ f64  │
#> ╞═════╪══════╪═════╪══════╡
#> │ 1.0 ┆ 4.0  ┆ x   ┆ 2.5  │
#> │ 8.0 ┆ 5.0  ┆ y   ┆ 6.5  │
#> │ 3.0 ┆ null ┆ z   ┆ 3.0  │
#> └─────┴──────┴─────┴──────┘