title: How can I change the axis position for pairs()?
body: <p>By default, <code>pairs()</code> puts the axes on all sides of the plot, alternating between the sides. However, I'm putting the correlation between the data sets in the upper triangle, so I want to adjust the axis position like this:</p>
  
  <p><img src="https://i.stack.imgur.com/TwK9j.png" alt="this is how it should look like"></p>
  
  <p>Which parameters do I need to set?</p>