# File lib/pdf/charts/stddev.rb, line 52
52:     def initialize(args = { })
53:       @range        = args[:range]
54:       @step         = args[:step]
55:       @style        = args[:style]
56:       @show_labels  = false
57: 
58:       yield self if block_given?
59: 
60:       raise TypeError, PDF::Lange[:charts_stddev_scale_norange] if @range.nil?
61:       raise TypeError, PDF::Lange[:charts_stddev_scale_nostep] if @step.nil?
62:     end