title: Lattice: multiple plots in one window?
body: <p>I'm trying to put multiple lattice plots in one window using <code>levelplot</code> by setting <code>par(mfrow=c(2,1))</code> but it seems to be ignoring this.</p>
  
  <p>Is there a particular function for setting multiple plots in <code>lattice</code>?</p>