# By default, chart uses a line width of 3 for line charts. # # You can use the :line_width option to customize this value. # filename = File.basename(__FILE__).gsub('.rb', '.pdf') Prawn::ManualBuilder::Example.generate(filename) do data = {views: {2013 => 182, 2014 => 46, 2015 => 802000000000000000000}} chart data, type: :line, line_width: 10 end