image of the
          Voronoi diagram of the points after several CVT iterations.
        </li>
      </ul>
    </p>

    <hr>

    <h2 align = "center">
      CVT_SQUARE_PDF_DISCRETE
    </h2>

    <p>
      <b>CVT_SQUARE_PDF_DISCRETE</b> is a MATLAB function which works the same
      as the code for the uniform square, except that
      we are now working with a density function defined by discrete data.
      In this case, the density is defined by a 20 x 20 grid of sample
      density values.  The ca