title: Three ggplots in a 2x2 grid
body: <p>Is it possible to set (with <code>par(mfrow=())</code> or something else) a multiple plot panel for 3 ggplot objects, where one takes whole row and the other two are placed in second row?</p>
  
  <p><a href="https://i.stack.imgur.com/vR9cF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vR9cF.png" alt="enter image description here"></a></p>