Select all float columns.

Description

Select all float columns.

Usage

cs__float()

Value

A Polars selector

See Also

cs for the documentation on operators supported by Polars selectors.

Examples

library("polars")

df <- pl$DataFrame(
  foo = c("x", "y"),
  bar = c(123L, 456L),
  baz = c(2.0, 5.5),
  zap = c(FALSE, TRUE),
  .schema_overrides = list(baz = pl$Float32, zap = pl$Float64),
)

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

#> shape: (2, 2)
#> ┌─────┬─────┐
#> │ baz ┆ zap │
#> │ --- ┆ --- │
#> │ f32 ┆ f64 │
#> ╞═════╪═════╡
#> │ 2.0 ┆ 0.0 │
#> │ 5.5 ┆ 1.0 │
#> └─────┴─────┘

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

#> shape: (2, 2)
#> ┌─────┬─────┐
#> │ foo ┆ bar │
#> │ --- ┆ --- │
#> │ str ┆ i32 │
#> ╞═════╪═════╡
#> │ x   ┆ 123 │
#> │ y   ┆ 456 │
#> └─────┴─────┘