Select all numeric columns.

Description

Select all numeric columns.

Usage

cs__numeric()

Value

A Polars selector

See Also

cs for the documentation on operators supported by Polars selectors.

Examples

library("polars")

df <- pl$DataFrame(
  foo = c("x", "y"),
  bar = c(123L, 456L),
  baz = c(2.0, 5.5),
  zap = 0:1,
  .schema_overrides = list(bar = pl$Int16, baz = pl$Float32, zap = pl$UInt8),
)

# Select all numeric columns:
df$select(cs$numeric())

#> shape: (2, 3)
#> ┌─────┬─────┬─────┐
#> │ bar ┆ baz ┆ zap │
#> │ --- ┆ --- ┆ --- │
#> │ i16 ┆ f32 ┆ u8  │
#> ╞═════╪═════╪═════╡
#> │ 123 ┆ 2.0 ┆ 0   │
#> │ 456 ┆ 5.5 ┆ 1   │
#> └─────┴─────┴─────┘

# Select all columns except for those that are numeric:
df$select(!cs$numeric())

#> shape: (2, 1)
#> ┌─────┐
#> │ foo │
#> │ --- │
#> │ str │
#> ╞═════╡
#> │ x   │
#> │ y   │
#> └─────┘