Class: Polars::DynamicGroupBy

Inherits:
Object
  • Object
show all
Defined in:
lib/polars/dynamic_group_by.rb

Overview

A dynamic grouper.

This has an .agg method which allows you to run all polars expressions in a group by context.

Instance Method Summary collapse

Constructor Details

#initialize(df, index_column, every, period, offset, truncate, include_boundaries, closed, by, start_by) ⇒ DynamicGroupBy

Returns a new instance of DynamicGroupBy.



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# File 'lib/polars/dynamic_group_by.rb', line 7

def initialize(
  df,
  index_column,
  every,
  period,
  offset,
  truncate,
  include_boundaries,
  closed,
  by,
  start_by
)
  period = Utils._timedelta_to_pl_duration(period)
  offset = Utils._timedelta_to_pl_duration(offset)
  every = Utils._timedelta_to_pl_duration(every)

  @df = df
  @time_column = index_column
  @every = every
  @period = period
  @offset = offset
  @truncate = truncate
  @include_boundaries = include_boundaries
  @closed = closed
  @by = by
  @start_by = start_by
end

Instance Method Details

#agg(aggs) ⇒ Object 



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# File 'lib/polars/dynamic_group_by.rb', line 35

def agg(aggs)
  @df.lazy
    .group_by_dynamic(
      @time_column,
      every: @every,
      period: @period,
      offset: @offset,
      truncate: @truncate,
      include_boundaries: @include_boundaries,
      closed: @closed,
      by: @by,
      start_by: @start_by
    )
    .agg(aggs)
    .collect(no_optimization: true, string_cache: false)
end