title: How to fill up the Cartesian plane with randomly distributed points?
body: <p>In matlab, how to fill up the Cartesian plane with randomly distributed points?</p>
  
  <p>That is, for each coordinate x(i,j) in the graph, a point is placed or is not placed based on some random criteria (for example a point is placed there iff a random number is > 0).</p>
  
  <p>Seems like this should be easy to implement, but I'm stumped.</p>