an class="keyword">end</span>;
0049   <span class="keyword">if</span> (strcmp(varargin{na},<span class="string">'what'</span>))
0050     ppargs = {ppargs{:}, <span class="string">'what'</span>, varargin{na+1}};
0051     showdata = 0;
0052     inc = 2;
0053   <span class="keyword">end</span>;
0054   <span class="keyword">if</span> (strcmp(varargin{na},<span class="string">'nodata'</span>))
0055     showdata = 0;
0056     inc = 1;
0057   <span class="keyword">end</span>;
0058   <span class="keyword"