    <span class="keyword">end</span>
0340     <span class="keyword">if</span> (strcmp(varargin{na},<span class="string">'h'</span>)) <span class="comment">% scalar</span>
0341         alpha(2) = varargin{na+1};
0342         inc = 2;
0343     <span class="keyword">end</span>;
0344     <span class="keyword">if</span> (strcmp(varargin{na},<span class="string">'pen'</span>)) <span class="comment">% scalar</span>
0345         alpha(3) = varargin{na+1};
0346         inc = 2;
0347     <span class="keyword"