ss="keyword">if</span> (strcmp(varargin{na},<span class="string">'ev'</span>)) <span class="comment">% char. string, or matrix with d columns.</span>
0373         ev = varargin{na+1};
0374         <span class="keyword">if</span> (isnumeric(ev)); ev = ev'; <span class="keyword">end</span>;
0375         inc = 2;
0376     <span class="keyword">end</span>;
0377     <span class="keyword">if</span> (strcmp(varargin{na},<span class="string">'ll'</span>)) <span class="comment">% row vector of length d.</span>
