plot two data sets on gnuplot

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 I'm trying to write a script to pass a file of stock prices and volumes,
 and plot the results on a gnuplot graph which is non-overlapped graph.

             Fig. 1
          ------------
             Fig. 2
        
 Figure 1 is a graph of stock prices, and Figure 2 is a graph of stock volumes,
 I'm trying to implement it as following codes,

   g = Gnuplot.Gnuplot()
   d1=Gnuplot.Data(self.days,self.open,self.high,self.low,self.close,
                   with='candlestick')
   d2=Gnuplot.Data(self.days,self.volume,with='boxes')
   g.plot(d1,d2)

 If anyone can get me back on track I'd appreciate it.

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