title: how to change the order of categorical values on X-axis when using seaborn.FacetGrid?
body: <p>I have following code:</p>
  
  <pre><code>g = sns.FacetGrid(correct_data, hue="congruency", col="PP", row="cue", height=4, ylim=(.4, .9))
  g.map(sns.pointplot, "pattern", "RT")
  </code></pre>
  
  <p>This allows me to create a line plot per participant (PP) and cue (cue) showing separate lines for each level of congruency. Each line shows the relationship between pattern (X-axis) and reaction time (RT on the Y-axis). I would like the reverse the order of the categorical values on the X-axis, how can I do this?
  The "pattern"-variable has two levels, but I like to reverse the default order in which it is displayed.</p>
  
  <p>Thank you.</p>