Contents

module Enumerable

  def sum
    self.inject(0){|accum, i| accum + i }
  end

  def mean
    self.sum/self.length.to_f
  end

  def sample_variance
    m = self.mean
    sum = self.inject(0){|accum, i| accum +(i-m)**2 }
    sum/(self.length - 1).to_f
  end

  def standard_deviation
    return Math.sqrt(self.sample_variance)
  end

end 

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
tabula-extractor-0.6.3-java	lib/tabula/core_ext.rb
tabula-extractor-0.6.1-java	lib/tabula/core_ext.rb
tabula-extractor-0.5.1-java	lib/tabula/core_ext.rb
tabula-extractor-0.5.0-java	lib/tabula/core_ext.rb