title: How to decrease hatch density in matplotlib
body: <p>I need to <strong>decrease the density of the hatch</strong> in a bar made with matplotlib.
  The way I add the hatches:</p>
  
  <pre><code>kwargs = {'hatch':'|'}
  rects2 = ax.bar(theta, day7, width,fill=False, align='edge', alpha=1, **kwargs)
  
  kwargs = {'hatch':'-'}
  rects1 = ax.bar(theta, day1, width,fill=False, align='edge', alpha=1, **kwargs)
  </code></pre>
  
  <p>I know that you can increase the density by adding more characters to the pattern, but how can you <strong>decrease</strong> the density?!</p>