Method: Polars::Selectors.float

Defined in:

lib/polars/selectors.rb

.float ⇒ Selector

Select all float columns.

Examples:

df = Polars::DataFrame.new(
  {
    "foo" => ["x", "y"],
    "bar" => [123, 456],
    "baz" => [2.0, 5.5],
    "zap" => [0.0, 1.0]
  },
  schema_overrides: {"baz" => Polars::Float32, "zap" => Polars::Float64}
)

Select all float columns:

df.select(Polars.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(~Polars.cs.float)
# =>
# shape: (2, 2)
# ┌─────┬─────┐
# │ foo ┆ bar │
# │ --- ┆ --- │
# │ str ┆ i64 │
# ╞═════╪═════╡
# │ x   ┆ 123 │
# │ y   ┆ 456 │
# └─────┴─────┘

Returns:

• (Selector)

# File 'lib/polars/selectors.rb', line 1411

def self.float
  Selector._from_rbselector(RbSelector.float)
end