def draw(svg, coords, options={})
      
      options.merge!(@options)
      
      if options[:shadow]
        svg.g(:class => 'shadow', :transform => "translate(#{relative(0.5)}, #{relative(0.5)})") {
          coords.each { |coord| svg.circle( :cx => coord.first, :cy => coord.last + relative(0.9), :r => relative(2), 
                                            :style => "stroke-width: #{relative(2)}; stroke: black; opacity: 0.35;" ) }
        }
      end

      coords.each { |coord| svg.circle( :cx => coord.first, :cy => coord.last, :r => relative(2), 
                                        :style => "stroke-width: #{relative(2)}; stroke: #{color.to_s}; fill: #{color.to_s}" ) }
    end
def draw(svg, coords, options={})
      
      options.merge!(@options)
      
      if options[:shadow]
        svg.g(:class => 'shadow', :transform => "translate(#{relative(0.5)}, #{relative(0.5)})") {
          coords.each { |coord| svg.circle( :cx => coord.first, :cy => coord.last + relative(0.9), :r => relative(2), 
                                            :style => "stroke-width: #{relative(2)}; stroke: black; opacity: 0.35;" ) }
        }
      end

      coords.each { |coord| svg.circle( :cx => coord.first, :cy => coord.last, :r => relative(2), 
                                        :style => "stroke-width: #{relative(2)}; stroke: #{color.to_s}; fill: #{color.to_s}" ) }
    end
Renders scatter graph.