PDF::Writer：PDF::Charts::StdDev#scale

require 'pdf/charts/stddev'

pdf = PDF::Writer.new

chart = PDF::Charts::StdDev.new

p chart.scale

pdf.save_as("2008042500.pdf")

で、

#<PDF::Charts::StdDev::Scale:0x403882dc @label=#<PDF::Charts::StdDev::Label:0x4038823c @text_size=8, @text_color=#<Color::RGB:0x402689c4 @b=0.0, @g=0.0, @r=0.0>, @decimal_precision=1, @pad=2>, @step=1, @show_labels=false, @range=0..6, @style=#<PDF::Writer::StrokeStyle:0x40388278 @width=0.25, @dash=nil, @join=nil, @cap=nil, @miter_limit=nil>>