n>
0057 <span class="comment">%</span>
0058 <span class="comment">%==============================================================================</span>
0059 
0060 <span class="keyword">if</span> nargin == 5
0061     warning([<span class="string">'Assuming uniform terrain-following sigma coordinates. '</span>, <span class="keyword">...</span>
0062         <span class="string">'To specify different sigma coordintes, supply a MATLAB mesh '</span>, <span class="keyword">...</span>
0063         <span class="str