# File lib/pdf/charts/stddev.rb, line 51
51:     def initialize(args = { })
52:       @range        = args[:range]
53:       @step         = args[:step]
54:       @style        = args[:style]
55:       @show_labels  = false
56: 
57:       yield self if block_given?
58: 
59:       raise TypeError, PDF::Lange[:charts_stddev_scale_norange] if @range.nil?
60:       raise TypeError, PDF::Lange[:charts_stddev_scale_nostep] if @step.nil?
61:     end