title: Fill barchart with patterns
body: <p>I am currently working on plotting a bar chart. For easier readability and to make the different bars distinguishable after b&amp;w-printing I want to plot the bars using different patterns and if at all possible different colors and patterns similar to <a href="http://www.burningcutlery.com/derek/bargraph/cluster-pattern.png" rel="nofollow noreferrer">this</a> or <a href="https://i.stack.imgur.com/OCJzr.png" rel="nofollow noreferrer">this</a>. Is this possible while using pandas or matplotlib? If so, are there pattern palettes similar to color palettes?
  My current code looks like this</p>
  
  <pre><code>df.transpose().plot.bar(width=0.8) 
  </code></pre>