Method: Utilities::Statistics#interquartile_range

Defined in:
lib/utilities/utilities.rb

#interquartile_range(already_sorted = false) ⇒ Object

Calculate the interquartile range of self



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# File 'lib/utilities/utilities.rb', line 111

def interquartile_range( already_sorted = false )
  return nil if size < 4
  a = sort_and_extend( already_sorted )
  a.last_quartile - a.first_quartile
end