
      Once the nonlinear least squares problem is set up, MATLAB's
      LSQNONLIN function is called to seek a solution.
    </p>

    <h3 align = "center">
      Usage:
    </h3>

    <p>
      <blockquote>
        <b>distance_to_position</b> ( <i>'distance.txt'</i> )
      </blockquote>
      reads the distance information in <i>'distance.txt'</i>, estimates the
      positions of the cities, and writes out a position table in <i>distance.coord.txt</i>.
    </p>

    <h3 align = "center">
      Licensin