title: seaborn clustermap: set colorbar ticks
body: <p>I would like to modify the ticks of a colorbar in a <code>seaborn.clustermap</code>. <a href="https://stackoverflow.com/questions/6715442/how-to-add-matplotlib-colorbar-ticks">This answer</a> addresses this question for a general <code>matplotlib</code> colorbar.  </p>
  
  <pre><code>g = sns.clustermap(np.random.rand(20,20), 
                     row_cluster=None, col_cluster=None,
                     vmin = 0.25, vmax=1.0)
  </code></pre>
  
  <p>For some reason when I specify <code>clustermap(..., vmin=0.25, vmax=1.0)</code>, I get ticks from 0.3 to 0.9, but no 1.0. If I extend <code>vmax=1.05</code>, I get a tick precisely at <code>1.05</code>.</p>
  
  <p>My guess was that the <code>g.cax</code> property of the object returned by <code>clustermap</code> is the colorbar, but it has no <code>.set_ticks()</code> method. </p>
  
  <p>Any ideas how one can I set the ticks?</p>