title: How to centre a colorbar at a defined value for seaborn heatmap?
body: <p>I am trying to plot a heatmap using seaborn. I have values from 0 to 5 and I need to make a blue-to-red color scale, with white being at 1, blue- below 1, and red - from 1 to 5.</p>
  <p>How can I do that?</p>
  <pre><code>import seaborn as sns; sns.set()
  hm=sns.heatmap(proportion, vmin=0, vmax=5, cmap='RdBu')
  </code></pre>
  <p>This is what I try to do, but it is not customized... 'proportion' is my variable. Is there anything I can do?</p>