 nargin&lt;2; error(<span class="string">'!'</span>); <span class="keyword">end</span>
0025 <span class="keyword">if</span> nargin&lt;3 ||isempty(smooth); smooth=1; <span class="keyword">end</span>
0026 <span class="keyword">if</span> nargin&lt;4 ||isempty(flags); flags=[]; <span class="keyword">end</span>
0027 <span class="keyword">if</span> nargin&lt;5; init=[]; <span class="keyword">end</span>
0028 <span class="keyword">if</span> nargin&lt;6||isempty(verbose); verbose=0; <span class="keyword">end</span>
