title: Set two matplotlib imshow plots to have the same color map scale
body: <p>I am trying to plot to fields with the same scale. The upper image values are a 10 times higher than the one bellow, but they turn out to be the same color in the imshow. How can I set both to have the same scales in colours?</p>
  
  <p>I added the code I am using bellow the image..</p>
  
  <p><a href="https://i.stack.imgur.com/zMyzj.png" rel="noreferrer"><img src="https://i.stack.imgur.com/zMyzj.png" alt="Two imshow plots"></a></p>
  
  <pre><code>def show_field(field1,field2):
      fig = plt.figure()
      ax = fig.add_subplot(2, 1, 1)
      ax.imshow(field1,cmap=plt.cm.YlGn)
      ax.set_adjustable('box-forced')
      ax.autoscale(False)
      ax2 = fig.add_subplot(2, 1, 2)
      ax2.set_adjustable('box-forced')
      ax2.imshow(field2,cmap=plt.cm.YlGn)
      ax2.autoscale(False)
      plt.show()
  </code></pre>