title: multiple axis in matplotlib with different scales
body: <p>How can multiple scales can be implemented in Matplotlib? I am not talking about the primary and secondary axis plotted against the same x-axis, but something like many trends which have different scales plotted in same y-axis and that can be identified by their colors. </p>
  
  <p>For example, if I have <code>trend1 ([0,1,2,3,4])</code> and <code>trend2 ([5000,6000,7000,8000,9000])</code> to be plotted against time and want the two trends to be of different colors and in Y-axis, different scales, how can I accomplish this with Matplotlib? </p>
  
  <p>When I looked into Matplotlib, they say that they don't have this for now though it is definitely on their wishlist, Is there a way around to make this happen?</p>
  
  <p>Are there any other plotting tools for python that can make this happen?</p>