      that was evaluated on a product grid, so that p(x(i)) = z(i).
    </p>

    <p>
      <a href = "../../f77_src/r8lib/r8lib.html">
      R8LIB</a>,
      a FORTRAN77 library which
      contains many utility routines using double precision real (R8) arithmetic.
    </p>

    <p>
      <a href = "../../f77_src/rbf_interp_1d/rbf_interp_1d.html">
      RBF_INTERP_1D</a>,
      a FORTRAN77 library which
      defines and evaluates radial basis function (RBF) interpolants to 1D data.
    </p>

    <p>
     