dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">S</td><td>points to an instance of the floating-point spline structure. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">type</td><td>type of cubic spline interpolation (boundary conditions) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">x</td><td>points to the x values of the known data points. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">y