PDF::Writer:PDF::Charts::StdDev#leading_gap, #leading_gap=
require 'pdf/charts/stddev' pdf = PDF::Writer.new chart = PDF::Charts::StdDev.new p chart.leading_gap #chart.leading_gap = 100 chart.leading_gap = -200 chart.data << PDF::Charts::StdDev::DataPoint.new(1, 4.0000, 0.5774) chart.render_on pdf pdf.save_as("2008042600.pdf")
で、
10