Module: RedAmber::DataFrameIndexable

Included in:
DataFrame
Defined in:
lib/red_amber/data_frame_indexable.rb

Overview

mix-ins for the class DataFrame

Instance Method Summary collapse

Instance Method Details

#map_indices(*indices) ⇒ Object

Common method



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# File 'lib/red_amber/data_frame_indexable.rb', line 7

def map_indices(*indices)
  return self if indices.empty?

  indices = indices[0].data if indices[0].is_a?(Vector)

  new_dataframe_by(indices)
end

#sort(*sort_keys) ⇒ RedAmber::DataFrame

Returns Sorted DataFrame.

Returns:



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# File 'lib/red_amber/data_frame_indexable.rb', line 25

def sort(*sort_keys)
  indices = @table.sort_indices(sort_keys.flatten)

  new_dataframe_by(indices)
end

#sort_indices(*sort_keys) ⇒ RedAmber::Vector

Returns Sorted indices in Vector.

Parameters:

  • sort_keys (Arrow::SortKey) —

    :key, “key” or “+key” denotes ascending, “-key” denotes descending order

Returns:



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# File 'lib/red_amber/data_frame_indexable.rb', line 19

def sort_indices(*sort_keys)
  indices = @table.sort_indices(sort_keys.flatten)
  Vector.create(indices)
end