title: How to plot a plane from an equation in R
body: <p>I've been tinkering with the RGL package to figure out how to plot a plane from an equation in R, to no avail. </p>
  
  <p>For example, I would like to visualize the following plane:</p>
  
  <pre><code>1x + 0y + 0z = 2
  0x + 1y + 0z = 3
  0x + 0y + 1z = 4
  </code></pre>
  
  <p>It seems the rgl's planes3d function only adds a plane to an existing 3D plot.</p>