 <span class="keyword">if</span> (strcmp(varargin{na},<span class="string">'kern'</span>)) <span class="comment">% character string.</span>
0365         kern = varargin{na+1};
0366         inc = 2;
0367     <span class="keyword">end</span>;
0368     <span class="keyword">if</span> (strcmp(varargin{na},<span class="string">'kt'</span>)) <span class="comment">% character string.</span>
0369         kt = varargin{na+1};
0370         inc = 2;
0371     <span class="keyword">end</span>;
0372     <span cla