# File temp/Graph/Graph.rb, line 177
      def burn
        raise "No data available" unless @data.size > 0
        
        calculations if methods.include? 'calculations'

        data = get_svg

        if @config[:compress]
          if @@__have_zlib
            inp, out = IO.pipe
            gz = Zlib::GzipWriter.new( out )
            gz.write data
            gz.close
            data = inp.read
          else
            data << "<!-- Ruby Zlib not available for SVGZ -->";
          end
        end
        
        return data
      end