Method: Polars::Selectors.integer

Defined in:

lib/polars/selectors.rb

.integer ⇒ SelectorProxy

Select all integer columns.

Examples:

df = Polars::DataFrame.new(
  {
    "foo" => ["x", "y"],
    "bar" => [123, 456],
    "baz" => [2.0, 5.5],
    "zap" => [0, 1]
  }
)

Select all integer columns:

df.select(Polars.cs.integer)
# =>
# shape: (2, 2)
# ┌─────┬─────┐
# │ bar ┆ zap │
# │ --- ┆ --- │
# │ i64 ┆ i64 │
# ╞═════╪═════╡
# │ 123 ┆ 0   │
# │ 456 ┆ 1   │
# └─────┴─────┘

Select all columns except for those that are integer:

df.select(~Polars.cs.integer)
# =>
# shape: (2, 2)
# ┌─────┬─────┐
# │ foo ┆ baz │
# │ --- ┆ --- │
# │ str ┆ f64 │
# ╞═════╪═════╡
# │ x   ┆ 2.0 │
# │ y   ┆ 5.5 │
# └─────┴─────┘

Returns:

• (SelectorProxy)

# File 'lib/polars/selectors.rb', line 852

def self.integer
  _selector_proxy_(F.col(INTEGER_DTYPES), name: "integer")
end