title: Make silhouette plot legible for k-means
body: <p>I am trying to make a silhouette plot for a k-means clustering, but the bars are almost invisble. How can I make this chart legible?</p>
  
  <p>Example code:</p>
  
  <pre><code>require(cluster)
  
  X &lt;- EuStockMarkets
  kmm &lt;- kmeans(X, 8)
  
  D &lt;- daisy(X)
  plot(silhouette(kmm$cluster, D), col=1:8)
  </code></pre>
  
  <p>Example output:</p>
  
  <p><a href="https://i.stack.imgur.com/8d6qP.png" rel="noreferrer"><img src="https://i.stack.imgur.com/8d6qP.png" alt="enter image description here"></a></p>