new (PDF::Charts::StdDev::Scale)

        # 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