title: Matplotlib function to center color palette on zero?
body: <p>I know about questions as the following:</p>
  
  <p><a href="https://stackoverflow.com/questions/7404116/defining-the-midpoint-of-a-colormap-in-matplotlib">Defining the midpoint of a colormap in matplotlib</a></p>
  
  <p><a href="https://stackoverflow.com/questions/25500541/matplotlib-bwr-colormap-always-centered-on-zero">matplotlib bwr-colormap, always centered on zero</a></p>
  
  <p>Is there a function (e.g. distributed with matplotlib) that automatically centers the colormap on zero and does not display a symmetrical colorbar like in the second example?</p>