span> start_of_recession
0182     
0183     <span class="keyword">case</span> <span class="string">'peak'</span>        
0184         <span class="keyword">if</span> size(flow_section,1)==0
0185             error_flag = 3;
0186             error_str = [<span class="string">'Error: No long enough recession periods, consider setting eps parameter &gt; 0. '</span>, error_str];
0187             <span class="keyword">return</span>
0188         <span class="keyword">elseif</span> size(flow_section,1) &lt; 10
0189