Method: Babbage::Array.percentile

Defined in:
lib/babbage/array.rb

.percentile(array, target) ⇒ Object 



25
26
27
28
29
30
31
32
33
34
35
36
 
# File 'lib/babbage/array.rb', line 25

def self.percentile(array, target)
  target = target.to_f / 100.0
  index = (array.length - 1) * target
  sorted_array = array.sort
  if index == index.to_i
    sorted_array[index.to_i]
  else
    average(
      sorted_array[index.floor, 2]
    )
  end
end