title: Change the height of a Seaborn heatmap colorbar
body: <p>I have the following Python code to create a heatmap using the Seaborn package:</p>
  
  <pre><code>f, ax = plt.subplots(figsize=(21,5))
  heatmap = sns.heatmap(significantBig5[basic].as_matrix().T,mask=labelsDf.T,
       annot=False,fmt='.2f',yticklabels=basic_labels,linewidths=0.5,square=True,
       xticklabels=traits)
  plt.xticks(rotation=70)
  </code></pre>
  
  <p>This creates the following heatmap:
  <a href="https://i.stack.imgur.com/wqWVJ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/wqWVJ.png" alt="sample heatmap"></a></p>
  
  <p>I would like to format this heatmap so that the colorbar on the right side is shorter. Is there a way to do this?</p>