module Median

Public Instance Methods

calculate_median(array) click to toggle source
# File lib/average/median.rb, line 8
def calculate_median(array)
  array.sort!
  if array.length.even?
    get_mean( middle_items_to_average(array) )
  else
    array[ array.length / 2.to_f ]
  end
end
get_median(array) click to toggle source
# File lib/average/median.rb, line 2
def get_median(array)
  if valid_array?(array)
    calculate_median(clean_array(array))
  end
end
middle_item(array) click to toggle source
# File lib/average/median.rb, line 17
def middle_item(array)
  array.size / 2
end
middle_items_to_average(array) click to toggle source
# File lib/average/median.rb, line 21
def middle_items_to_average(array)
  array[ middle_item(array) -1 .. middle_item(array) ]
end