title: How to size my imshow?
body: <p>I generated a 2d intensity matrix with the following code:</p>
  
  <pre><code>H, x_e, y_e = np.histogram2d(test_y, test_x, bins=(y_e, x_e))
  </code></pre>
  
  <p>The values of x_e and y_e are:</p>
  
  <pre><code>x_e
  array([ 0.05      ,  0.0530303 ,  0.05606061,  0.05909091,  0.06212121,
          0.06515152,  0.06818182,  0.07121212,  0.07424242,  0.07727273,
          0.08030303,  0.08333333,  0.08636364,  0.08939394,  0.09242424,
          0.09545455,  0.09848485,  0.10151515,  0.10454545,  0.10757576,
          0.11060606,  0.11363636,  0.11666667,  0.11969697,  0.12272727,
          0.12575758,  0.12878788,  0.13181818,  0.13484848,  0.13787879,
          0.14090909,  0.14393939,  0.1469697 ,  0.15      ,  0.1530303 ,
          0.15606061,  0.15909091,  0.16212121,  0.16515152,  0.16818182,
          0.17121212,  0.17424242,  0.17727273,  0.18030303,  0.18333333,
          0.18636364,  0.18939394,  0.19242424,  0.19545455,  0.19848485,
          0.20151515,  0.20454545,  0.20757576,  0.21060606,  0.21363636,
          0.21666667,  0.21969697,  0.22272727,  0.22575758,  0.22878788,
          0.23181818,  0.23484848,  0.23787879,  0.24090909,  0.24393939,
          0.2469697 ,  0.25      ,  0.2530303 ,  0.25606061,  0.25909091,
          0.26212121,  0.26515152,  0.26818182,  0.27121212,  0.27424242,
          0.27727273,  0.28030303,  0.28333333,  0.28636364,  0.28939394,
          0.29242424,  0.29545455,  0.29848485,  0.30151515,  0.30454545,
          0.30757576,  0.31060606,  0.31363636,  0.31666667,  0.31969697,
          0.32272727,  0.32575758,  0.32878788,  0.33181818,  0.33484848,
          0.33787879,  0.34090909,  0.34393939,  0.3469697 ,  0.35      ])
  y_e
  array([ 0.,  1.,  2.,  3.,  4.,  5.,  6.,  7.,  8.,  9.])
  </code></pre>
  
  <p>I cannot seem to achieve control over the shape of my plotted output with this code:</p>
  
  <pre><code>fig = plt.figure(figsize=(10, 10))
  ax = fig.add_subplot(111)
  ax.set_title(feature_of_interest)
  im = plt.imshow(H, interpolation='nearest', origin='low',
                  extent=[y_e[0], y_e[-1], x_e[0], x_e[-1]])
  </code></pre>
  
  <p>This gives me a very squashed output where I can't see anything:</p>
  
  <p><a href="https://i.stack.imgur.com/zDB4O.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zDB4O.png" alt="enter image description here"></a></p>
  
  <p>How can I adjust the parameters to get a better aspect ratio?</p>
  
  <p>Here's what I've tried so far:</p>
  
  <ul>
  <li>playing around with the <code>extent</code> parameter. This changes the shape, but not in a predictable way. Also that makes the axis labels incorrect. </li>
  <li>changing the <code>figsize</code> parameter. This doesn't seem to have any effect. </li>
  </ul>