Contents

module WBench
  class Stats < SimpleDelegator
    def median
      sort[length / 2]
    end

    def sum
      inject(:+)
    end

    def mean
      sum / length.to_f
    end

    def sample_variance
      (inject(0) { |variance, value| variance + ((value - mean) ** 2) }) / length
    end

    def std_dev
      Math.sqrt(sample_variance)
    end
  end
end

Version data entries

15 entries across 15 versions & 1 rubygems

Version	Path
wbench-1.1.1	lib/wbench/stats.rb
wbench-1.1.0	lib/wbench/stats.rb
wbench-1.0.0	lib/wbench/stats.rb
wbench-0.4.0	lib/wbench/stats.rb
wbench-0.3.7	lib/wbench/stats.rb
wbench-0.3.6	lib/wbench/stats.rb
wbench-0.3.5	lib/wbench/stats.rb
wbench-0.3.4	lib/wbench/stats.rb
wbench-0.3.3	lib/wbench/stats.rb
wbench-0.3.2	lib/wbench/stats.rb
wbench-0.3.1	lib/wbench/stats.rb
wbench-0.3.0	lib/wbench/stats.rb
wbench-0.2.3	lib/wbench/stats.rb
wbench-0.2.2	lib/wbench/stats.rb
wbench-0.2.1	lib/wbench/stats.rb