# File temp/Graph/Line.rb, line 130
      def min_value
        min = 0
        
        if (min_scale_value.nil? == false) then
          min = min_scale_value
        elsif (stacked == true) then
          min = @data[-1][:data].min
        else
          min = @data.collect{|x| x[:data].min}.min
        end

        return min
      end