  <ul>
        <li>
          <a href = "lagrange_approx_1d.m">lagrange_approx_1d.m</a>
          evaluates the Lagrange approximant of degree M.
        </li>
        <li>
          <a href = "lagrange_basis_1d.m">lagrange_basis_1d.m</a>
          evaluates the Lagrange basis polynomials.
        </li>
      </ul>
    </p>

    <h3 align = "center">
      Examples and Tests:
    </h3>

    <p>
      <ul>
        <li>
          <a href = "lagrange_approx_1d_test.m">lagrange_approx_1d_test.m</a>,
          a