ow_section less than 4 points, remove</span>
0215         flow_section = flow_section(~isnan(flow_section(:,1)),:);
0216         flow_section = flow_section(flow_section(:,2)&gt;=flow_section(:,1)+3,:);
0217         <span class="keyword">if</span> size(flow_section,1)==0
0218             error_flag = 3;
0219             error_str = [<span class="string">'Error: No long enough baseflow recession periods, consider increasing filter_par parameter. '</span>, error_str];
0220         <span class="keyword">elseif