Class: Array

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

Instance Method Summary collapse

Instance Method Details

#sum_it(attribute) ⇒ Object 



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# File 'lib/conductor.rb', line 77

def sum_it(attribute)
  self.map {|x| x.send(attribute) }.compact.sum
end

#weighted_mean ⇒ Object 



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# File 'lib/conductor.rb', line 85

def weighted_mean
  w_sum = sum(self)
  return 0.00 if w_sum == 0.00
  
  w_prod = 0
  self.each_index {|i| w_prod += (i+1) * self[i].to_f}
  w_prod.to_f / w_sum.to_f
end

#weighted_mean_of_attribute(attribute) ⇒ Object 



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# File 'lib/conductor.rb', line 81

def weighted_mean_of_attribute(attribute)
  self.map {|x| x.send(attribute) }.compact.weighted_mean
end