Module: Math

Defined in:
lib/el4r/el4r-sub.rb

Overview

sigma

Class Method Summary collapse

Class Method Details

.sigma(b, e) ⇒ Object

Math.sigma(b, e) { expr }



114
115
116
117
118
119
120
121
122
123
124
 
# File 'lib/el4r/el4r-sub.rb', line 114

def sigma(b,e)
  if b > e then
    0
  else
    s=0
    b.upto(e) do |i|
      s += yield(i) || 0
    end
    s
  end
end