Select all decimal columns

Description

Select all decimal columns

Usage

cs__decimal()

Value

A Polars selector

See Also

cs for the documentation on operators supported by Polars selectors.

Examples

library("polars")

df <- pl$DataFrame(
  foo = c("x", "y"),
  bar = c(123, 456),
  baz = c("2.0005", "-50.5555"),
  .schema_overrides = list(
    bar = pl$Decimal(),
    baz = pl$Decimal(scale = 5, precision = 10)
  )
)

# Select decimal columns:
df$select(cs$decimal())

#> shape: (2, 2)
#> ┌──────────────┬───────────────┐
#> │ bar          ┆ baz           │
#> │ ---          ┆ ---           │
#> │ decimal[*,0] ┆ decimal[10,5] │
#> ╞══════════════╪═══════════════╡
#> │ 123          ┆ 2.00050       │
#> │ 456          ┆ -50.55550     │
#> └──────────────┴───────────────┘

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

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