title: Plotting two axes in gnuplot
body: <p>Is it possible to plot two curves, with two corresponding axes in gnuplot, each of which has a different scale?</p>
  
  <p>For example, <code>y=x**2</code> and <code>y=x**4</code> in the same graph (they vary enough to be "uncomfortable" when plotted with the same scale).</p>