Method: Polars::Selectors.numeric

Defined in:

lib/polars/selectors.rb

.numeric ⇒ SelectorProxy

Select all numeric columns.

Examples:

df = Polars::DataFrame.new(
  {
    "foo" => ["x", "y"],
    "bar" => [123, 456],
    "baz" => [2.0, 5.5],
    "zap" => [0, 0]
  },
  schema_overrides: {"bar" => Polars::Int16, "baz" => Polars::Float32, "zap" => Polars::UInt8},
)

Match all numeric columns:

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

Match all columns except for those that are numeric:

df.select(~Polars.cs.numeric)
# =>
# shape: (2, 1)
# ┌─────┐
# │ foo │
# │ --- │
# │ str │
# ╞═════╡
# │ x   │
# │ y   │
# └─────┘

Returns:

• (SelectorProxy)

# File 'lib/polars/selectors.rb', line 1053

def self.numeric
  _selector_proxy_(F.col(NUMERIC_DTYPES), name: "numeric")
end