  <span class="comment">% interpolate down the water column (from POLCOMS to FVCOM).</span>
0195         <span class="comment">% Change to 'pchip' to match PWC parent code.</span>
0196         <span class="keyword">if</span> ~isnan(tpz)
0197             fvtemp(pp, :) = interp1(norm_tpz, itempz(pp, :), tfz, <span class="string">'pchip'</span>, <span class="string">'extrap'</span>);
0198             fvsal(pp, :) = interp1(norm_tpz, isalz(pp, :), tfz, <span class="string">'pchip'</span>, <span class="string">'