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Contents
module Polars
# Namespace for categorical related expressions.
class CatExpr
# @private
attr_accessor :_rbexpr
# @private
def initialize(expr)
self._rbexpr = expr._rbexpr
end
# Get the categories stored in this data type.
#
# @return [Expr]
#
# @example
# df = Polars::Series.new(
# "cats", ["foo", "bar", "foo", "foo", "ham"], dtype: Polars::Categorical
# ).to_frame
# df.select(Polars.col("cats").cat.get_categories)
# # =>
# # shape: (3, 1)
# # ┌──────┐
# # │ cats │
# # │ --- │
# # │ str │
# # ╞══════╡
# # │ foo │
# # │ bar │
# # │ ham │
# # └──────┘
def get_categories
Utils.wrap_expr(_rbexpr.cat_get_categories)
end
end
end
Version data entries
46 entries across 46 versions & 1 rubygems