title: Descend x-axis values using matplotlib
body: <p>How can I plot a bar graph where the x-axis values are in descending order from highest to lowest? </p>
  
  <p>Example:</p>
  
  <p>For example purposes, my plot is graphed as so:</p>
  
  <p><img src="https://i810.photobucket.com/albums/zz24/JasonBerryhill/sT70c.png" alt="graph"></p>
  
  <p>I need the graph to sort where it plots Monday(highest value), Wednesday, Tuesday(smallest value) (respectively)</p>
  
  <p>Here's what I have so far:</p>
  
  <pre><code>x_axis = ['a','b','c'...'z']
  y_axis = [#...#...#] number values for each letter in xaxis
  
  def barplot(x_axis, y_axis): #x and y axis defined in another function
      x_label_pos = range(len(y_axis))
      plot.bar(x_label_pos, y_axis)
      plot.yticks(range(0, int(max(y_axis) + 2), 2))
      plot.xticks(x_axis) 
  </code></pre>